Headlamps. Diagnosis and Testing

DTC Chart: BCM

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

DTC Chart

Trouble Code	Description	Action
B124A:11	Right DRL: Short to Ground	GO to Pinpoint Test U
B124A:15	Right DRL: Short to Battery or Open	If the lamp does not operate, GO to Pinpoint Test U. If the lamp is constantly on, GO to Pinpoint Test V.
B124B:11	Left DRL: Short to Ground	GO to Pinpoint Test U
B124B:15	Left DRL: Short to Battery or Open	If the lamp does not operate, GO to Pinpoint Test U. If the lamp is constantly on, GO to Pinpoint Test V.
B143B: 11	Lamp Switch Input: Short to Ground	For halogen headlamps: GO to Pinpoint Test E For LED headlamps: GO to Pinpoint Test F
B143K:11	Headlamp Off Input: Short to Ground	For halogen headlamps: GO to Pinpoint Test E For LED headlamps: GO to Pinpoint Test F
B143D:11	Headlamp Input: Short to Ground	For halogen headlamps: GO to Pinpoint Test E For LED headlamps: GO to Pinpoint Test F
B143E:11	Headlamp switch input: short to ground	For halogen headlamps: GO to Pinpoint Test E For LED headlamps: GO to Pinpoint Test F
B1447:11	Parking lamp switch input signal: short to ground	For halogen headlamps: GO to Pinpoint Test E For LED headlamps: GO to Pinpoint Test F
B1499:11	Exterior lamps power supply "A": short to ground	GO to Pinpoint Test S
B1499:15	Exterior lamps power supply "A": short to battery or open	GO to Pinpoint Test S
B149D: 11	Exterior lamps power supply "B": short to ground	GO to Pinpoint Test S
B149D: 15	Exterior lamps power supply "B": short to battery or open circuit	GO to Pinpoint Test S
B1D00:11	Left low beam: circuit short to ground	For halogen headlamps: GO to Pinpoint Test A For LED headlamps: GO to Pinpoint Test B
B1D00:15	Low Beam Left: Short to Battery or Open Circuit	If the low beam does not operate, for halogen headlamps GO to Pinpoint Test A. If the low beam does not operate, for LED headlamps GO to Pinpoint Test B. If the low beam is always on, for halogen headlamps GO to Pinpoint Test E. If the low beam is always on, for LED headlamps GO to Pinpoint Test F.
B1D01:11	Low Beam Right: Short to Ground	For halogen headlamps: GO to Pinpoint Test A For LED headlamps: GO to Pinpoint Test B
B1D01:15	Low Beam Right: Short to Battery or Open Circuit	If the low beam does not operate, for halogen headlamps GO to Pinpoint Test A. If the low beam does not operate, for LED headlamps GO to Pinpoint Test B. If the low beam is always on, for halogen headlamps GO to Pinpoint Test E. If the low beam is always on, for LED headlamps GO to Pinpoint Test F.
B1D02:11	Left high beam: short to ground	For halogen headlamps, For LED headlamps,
B1D02:15	Left high beam: short to battery or open circuit	If the high beam does not operate, for halogen headlamps GO to Pinpoint Test C. If the high beam does not operate, for LED headlamps GO to Pinpoint Test D. If the high beam is always on, for halogen headlamps GO to Pinpoint Test G. If the high beam is always on, for LED headlamps GO to Pinpoint Test H.
B1D03:11	Right high beam: short to ground	For halogen headlamps, For LED headlamps,
B1D03:15	Right high beam: short to ground	If the high beam does not operate, for halogen headlamps GO to Pinpoint Test C. If the high beam does not operate, for LED headlamps GO to Pinpoint Test D. If the high beam is always on, for halogen headlamps GO to Pinpoint Test G. If the high beam is always on, for LED headlamps GO to Pinpoint Test H.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is corrected. FIRST, REFER to all other diagnostic trouble codes (DTCs). After the cause is corrected, CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. For more information on BCM FET protection, see REFER TO: Multifunction Electronic Modules - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	The module has permanently disabled the output due to excessive current draw (for example, a short to ground) that exceeded the limits the BCM can withstand. The cause of the excessive current draw MUST be corrected before installing a new BCM. FIRST, REFER to all other diagnostic trouble codes (DTCs). After the cause is corrected, Click here to access the guided procedure (BCM). This Pinpoint Test requires Internet Explorer version 11 or later. For additional information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

DTC Chart: HCM

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

HCM Diagnostic Trouble Code Chart

Trouble Code	Description	Action
C1A03:29	Left Front Height Sensor: Incorrect Signal	GO to Pinpoint Test W
C1A05:29	Left Rear Height Sensor: Incorrect Signal	GO to Pinpoint Test W
B103K:01	Left headlamp control: general electrical malfunction	If the low beam headlamp does not operate, GO to Pinpoint Test B. If the low beam headlamp is always on, GO to Pinpoint Test F. If the high beam headlamp does not operate, GO to Pinpoint Test D. If the high beam headlamp is always on, GO to Pinpoint Test H. Except for North America, if automatic headlamp level adjustment does not operate or does not operate correctly, GO to Pinpoint Test R.
B103D:01	Right headlamp control: general electrical malfunction	If the low beam headlamp does not operate, GO to Pinpoint Test B. If the low beam headlamp is always on, GO to Pinpoint Test F. If the high beam headlamp does not operate, GO to Pinpoint Test D. If the high beam headlamp is always on, GO to Pinpoint Test H. Except for North America, if automatic headlamp level adjustment does not operate or does not operate correctly, GO to Pinpoint Test R. If the front turn signal lamp does not operate or is always on, Refer to: Turn Signal and Hazard Warning Lamps (417-01 Exterior Lighting, Diagnosis and Testing). If the parking lamp does not operate or is always on, Refer to: Parking, Tail and License Plate Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1087:00	LIN bus "A": no sub-type information	For halogen headlamps: GO to Pinpoint Test Q For LED headlamps: GO to Pinpoint Test F
B1088:00	LIN bus "B": no sub-type information	For halogen headlamps: GO to Pinpoint Test Q For LED headlamps: GO to Pinpoint Test F
B1D64:01	Left Headlamp Swivel Motor: General Electrical Failure	GO TO Pinpoint Test R
B1D65:01	Right Headlamp Swivel Motor: General Electrical Failure	GO TO Pinpoint Test R
U0100:00	Lost Communication With ECM/PCM "A": No Sub Type Information	GO to Pinpoint Test K
U0121:00	Lost Communication with Anti-Lock Braking System (ABS) Control Module: No Sub-Type Information	GO to Pinpoint Test L
U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test M
U0151:00	Lost Communication with Restraints Control Module: No Sub Type Information	GO to Pinpoint Test N
U0212:00	Lost Communication with Steering Column Control Module: No Sub Type Information	GO TO Pinpoint Test O
U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	GO to Pinpoint Test P
U0401:00	Incorrect Data Received from ECM/PCM 'A': No Sub Type Information	This DTC sets when the HCM receives invalid network data from the PCM. RETRIEVE and RESOLVE all non-network diagnostic trouble codes (DTCs) in the PCM and other modules on the network. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
U0415:00	Incorrect Data Received from Anti-Lock Braking System (ABS) Control Module: No Sub-Type Information	This DTC sets when the HCM receives invalid network data from the ABS module. RETRIEVE and RESOLVE all non-network diagnostic trouble codes (DTCs) in the ABS module and other modules on the network. Refer to: Anti-Lock Brake System (ABS) and Stability Control (206-09 Anti-Lock Brake System (ABS) and Stability Control, Diagnosis and Testing).
U0422:00	Incorrect Data Received from Body Control Module: No Sub Type Information	This DTC sets when the HCM receives invalid network data from the BCM. RETRIEVE and RESOLVE all non-network diagnostic trouble codes (DTCs) in the BCM and other modules on the network. Refer to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
U0452:00	Incorrect Data Received from Restraints Control Module: No Sub Type Information	This DTC sets when the HCM receives invalid network data from the RCM. RETRIEVE and RESOLVE all non-network diagnostic trouble codes (DTCs) in the RCM and other modules on the network. Refer to: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
U2101:00	Control Module Configuration Incompatible: No Sub Type Information	CHECK the vehicle service history for recent service actions involving this module. This DTC is set due to incomplete or incorrect PMI procedures. If service operations have recently been performed on this module, REPEAT the PMI procedure as directed by the diagnostic tool. Refer to: Module Programming (418-01 Module Configuration, General Procedures). If no service actions have recently been performed, INSTALL a new HCM to correct the configuration data storage error.
U3000:49	Control Module: Internal Electronic Failure	CLEAR the DTC. REPEAT the self-test. If the DTC returns, INSTALL a new HCM.

DTC Chart: SCCM

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

SCCM Diagnostic Trouble Code Chart

Trouble Code	Description	Action
B1007:09	High beam headlamp switch: component failure	INSTALL a new left multifunction switch on the steering column. Refer to: Left Multifunction Switch on the Steering Column (211-05 Steering Wheel and Steering Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern is not resolved, INSTALL a new SCCM. Refer to: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Steering Column Electrical Components, Removal and Installation).

DTC Chart: IPMA

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

IPMA Diagnostic Trouble Code Chart

Trouble Code	Description	Action
B11C7:46	High beam sensor: calibration/parameter memory failure	GO to Pinpoint Test J
B11C7:97	High beam sensor: component or system operation sticking or binding	GO to Pinpoint Test J

Symptom Chart

Symptom Chart: Headlamps

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart

Condition	Possible Sources	Action
Module Does Not Respond to Scan Tool	Fuse Wiring, Terminals or Connectors Module	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
One or both low beams do not operate - halogen headlamps	Refer to Pinpoint Test	CHECK that the bulb(s) are OK. If OK, GO to Pinpoint Test A.
One or both low beams do not operate - LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test B
One or both high beams do not operate - halogen headlamps	Refer to Pinpoint Test	CHECK that the bulb(s) are serviceable. If the bulbs are serviceable, go to Pinpoint Test C.
One or both high beams do not operate - LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test D
One or both low beams are always on - halogen headlamps	Refer to Pinpoint Test	GO to Pinpoint Test E
One or both low beams are always on - LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test F
One or both high beams are always on - halogen headlamps	Refer to Pinpoint Test	GO to Pinpoint Test G
One or both high beams are always on - LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test H
Flash-to-pass function inoperative	Refer to Pinpoint Test	GO to Pinpoint Test I
Automatic high beam function inoperative	Refer to Pinpoint Test	GO to Pinpoint Test J
Manual headlamp level adjustment does not operate or does not operate correctly - except North America, halogen headlamps	Refer to Pinpoint Test	GO to Pinpoint Test Q
Automatic headlamp leveling is inoperative/does not operate correctly - except North America, LED headlamps	Refer to Pinpoint Test	GO TO Pinpoint Test R
One turn/park lamp is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test S
One or both turn/park lamps are inoperative, dim when the parking lamps are on, or do not illuminate when the parking lamps are off	Refer to Pinpoint Test	Diagnosis: One or more front park or side marker lamps are inoperative. REFER TO: Park, Tail and License Lamps (417-01 Exterior Lighting, Diagnosis and Testing).

Symptom Chart: DRL

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart

Condition	Possible Sources	Action
Module Does Not Respond to Scan Tool	Fuse Wiring, Terminals or Connectors Module	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
DRLs are inoperative - halogen headlamps without LED turn/park lamps and LED headlamps	Refer to Pinpoint Test	GO TO Pinpoint Test T
DRLs are inoperative - halogen headlamps with LED turn/park lamps and LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test U
DRLs are always on - halogen headlamps with LED turn/park lamps and LED headlamps	Refer to Pinpoint Test	GO to Pinpoint Test V

Pinpoint Tests

One or both low beams are inoperative - halogen headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B1D00:11	Low Beam Left: Short to Ground	Set when the BCM detects a short to ground in the left low beam output circuit.
B1D00:15	Low Beam Left: Short to Battery or Open Circuit	Set when the BCM detects an open in the left low beam output circuit.
B1D01:11	Low Beam Right: Short to Ground	Set when the BCM detects a short to ground in the right low beam output circuit.
B1D01:15	Low Beam Right: Short to Battery or Open Circuit	Set when the BCM detects an open in the right low beam output circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Lamp
• Wiring, Terminals or Connectors
• Headlamp Assembly
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the bulbs and make sure they are in good condition.
• Inspect the headlamp assembly for damage.

SPECIFIC TEST A: ONE OR BOTH LOW BEAM HEADLAMPS DO NOT OPERATE - HALOGEN HEADLAMPS

NOTE: Due to different power ratings and resulting current draw of some aftermarket halogen incandescent bulbs, the BCM may activate its short-circuit protection strategy, resulting in a failure of the low beam output circuit. Make sure the bulbs meet Ford specifications. If the bulbs do not meet Ford specifications, install the correct bulbs. Perform a Self-Test (required to clear certain Diagnostic Trouble Codes (DTCs) and reset the BCM). Repair all unresolved Diagnostic Trouble Codes (DTCs). Clear all Diagnostic Trouble Codes (DTCs). Verify the system operates normally.

A1 DETERMINE IF ONE OR BOTH LOW BEAM HEADLAMPS ARE INOPERATIVE

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Are both low beams inoperative? Yes GO to A8 No GO to A2

A2 CHECK THE HEADLAMP VOLTAGE

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. Set the headlamp switch to the HEADLAMPS position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the voltage greater than 11 volts? Yes GO to A4 No GO to A3

A3 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE HEADLAMP VOLTAGE

Turn the headlamp switch to the OFF position. Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver). Ignition OFF. The ignition is on. Set the headlamp switch to the HEADLAMPS position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the voltage greater than 11 volts? Yes GO to A5 No GO to A6

A4 CHECK THE GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 C1509A-16 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 C1510A-16 Is the voltage greater than 11 volts? Yes GO to A5 No REPAIR the circuit.

A5 CHECK THE LOW BEAM LAMPS

Turn the headlamp switch to the OFF position. Replace the known good low beam lamp. REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation). Set the headlamp switch to the HEADLAMPS position. Does the non-operating headlamp illuminate? Yes REMOVE the known good bulb. INSTALL a new bulb. REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation). No REMOVE the known good bulb. CHECK the headlamp internal wiring harness for an open or short, damage, or pushed-out pin. If the harness is not serviceable, REPAIR the harness. If the harness is not repairable, INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

A6 CHECK THE LOW BEAM FEED CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: BCM C2280B. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the resistance greater than 10000 Ohms? Yes GO to A7 No REPAIR the circuit. After the repair: If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation. If any BCM diagnostic trouble codes (DTCs) other than DTC U3000:49 are present, CLEAR the diagnostic trouble codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. CHECK the system for normal operation. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

A7 CHECK THE LOW BEAM FEED CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 C2280B-4 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 C2280B-2 Is the resistance less than 3 ohms? Yes GO to A8 No REPAIR the circuit.

A8 CHECK BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both low beams are inoperative - LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B103K:01	Left headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B103D:01	Right headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B1D00:11	Low Beam Left: Short to Ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the left low beam output circuit.
B1D00:15	Low Beam Left: Short to Battery or Open Circuit	Continuous memory and on-demand DTC that sets when the BCM detects an open in the left low beam output circuit.
B1D01:11	Low Beam Right: Short to Ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the right low beam output circuit.
B1D01:15	Low Beam Right: Short to Battery or Open Circuit	Continuous memory and on-demand DTC that sets when the BCM detects an open in the right low beam output circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Wiring, Terminals or Connectors
• Adaptive Front Lighting Module
• Headlamp Assembly
• HS-CAN
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp assembly for damage.

SPECIFIC TEST B: ONE OR BOTH LOW BEAM LAMPS DO NOT OPERATE - LIGHT EMITTING DIODE (LED) HEADLAMPS

B1 DETERMINE IF ONE OR BOTH LOW BEAMS ARE INOPERATIVE

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Are both low beams inoperative? Yes GO to B8 No GO to B2

B2 CHECK THE HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on. Using the diagnostic scan tool, perform the HCM self-test. Is DTC B103C:01 or B103D:01 present? Yes GO to B7 No GO to B3

B3 CHECK THE LED (LIGHT EMITTING DIODE) VOLTAGE CIRCUIT

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Set the headlamp switch to the HEADLAMPS position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the voltage greater than 11 volts? Yes GO to B6 No GO to B4

B4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE LED (LIGHT EMITTING DIODE) VOLTAGE CIRCUIT

Turn the headlamp switch to the OFF position. Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver). Ignition OFF. The ignition is on. Set the headlamp switch to the HEADLAMPS position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the voltage greater than 11 volts? Yes GO to B7 No GO to B5

B5 CHECK THE LED (LIGHT EMITTING DIODE) VOLTAGE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: BCM C2280B. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 Ground Is the resistance greater than 10000 Ohms? Yes GO to B7 No REPAIR the faulty circuit. After the repair: If no Diagnostic Trouble Codes (DTCs) are present, VERIFY the system operates normally. If any BCM Diagnostic Trouble Codes (DTCs) other than DTC U3000:49 are present, CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. VERIFY the system operates normally. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

B6 CHECK THE LED (LIGHT EMITTING DIODE) GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-6 C1509A-16 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-6 C1510A-16 Is the voltage greater than 11 volts? Yes GO to B7 No REPAIR the faulty circuit.

B7 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate correctly? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

B8 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both high beams are inoperative - halogen headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B1D02:11	Left high beam: short to ground	Set when the BCM detects a short to ground in the left high beam output circuit.
B1D02:15	Left high beam: short to battery or open circuit	Set when the BCM detects an open in the left high beam output circuit.
B1D03:11	Right high beam: short to ground	Set when the BCM detects a short to ground in the right high beam output circuit.
B1D03:15	Right high beam: short to battery or open	Set when the BCM detects an open in the right high beam output circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Lamp
• Wiring, Terminals or Connectors
• Multifunction switch
• Headlamp Assembly
• SCCM
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp assembly for damage.

SPECIFIC TEST C: ONE OR BOTH HIGH BEAM LAMPS DO NOT OPERATE - HALOGEN HEADLAMPS

C1 CHECK LOW BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Turn the left multifunction switch on the steering column to the high beam position and observe the headlamps. Set the left multifunction switch on the steering column to the LOW BEAM position and observe the headlamps. Do the low beams operate? Yes If a single high beam is inoperative, GO to C3. If both high beams are inoperative, GO to C2. No GO to Pinpoint Test A

C2 CHECK THE MULTIFUNCTION SWITCH INPUT

Using a scan tool, view the SCCM Parameter Identifications (PIDs). Monitor the SCCM HEADLAMP_SW switch mode PID while moving the left multifunction switch on the steering column to the FLASH-TO-PASS and HIGH BEAM positions. Do the PID values match the left multifunction switch position on the steering column? Yes GO TO C9 No INSTALL a new left multifunction switch on the steering column. Refer to: Left Multifunction Switch on the Steering Column (211-05 Steering Wheel and Steering Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern is not resolved, INSTALL a new SCCM. Refer to: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Steering Column Electrical Components, Removal and Installation).

C3 CHECK THE HIGH BEAM VOLTAGE

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. Set the headlamp switch to the HEADLAMPS position and the left multifunction switch on the steering column to the HIGH BEAM position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the voltage greater than 11 volts? Yes GO to C5 No GO TO C4

C4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE HIGH BEAM VOLTAGE

Turn the headlamp switch to the OFF position. Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver). Ignition OFF. The ignition is on. Set the headlamp switch to the HEADLAMPS position and the left multifunction switch on the steering column to the HIGH BEAM position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the voltage greater than 11 volts? Yes GO to C6 No GO TO C7

C5 CHECK THE HIGH BEAM GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 C1509A-9 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 C1510A-9 Is the voltage greater than 11 volts? Yes GO to C6 No REPAIR the circuit.

C6 CHECK THE HIGH BEAM LAMP

Turn the headlamp switch to the off position. Replace the known good high beam lamp. REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation). Set the headlamp switch to the headlamps ON position and the left multifunction switch on the steering column to the high beam position. Does the non-operating headlamp illuminate? Yes REMOVE the known good bulb. INSTALL a new bulb. REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation). No REMOVE the known good bulb. CHECK the headlamp internal wiring harness for an open or short, damage, or pushed-out pin. If the harness is not serviceable, REPAIR the harness. If the harness is not repairable, INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

C7 CHECK THE HIGH BEAM POWER CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: BCM C2280B. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the resistance greater than 10000 Ohms? Yes GO TO C8 No REPAIR the circuit. After the repair: If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation. If any BCM diagnostic trouble codes (DTCs) other than DTC U3000:49 are present, CLEAR the diagnostic trouble codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. CHECK the system for normal operation. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

C8 CHECK THE HIGH BEAM POWER CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 C2280B-11 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 C2280B-6 Is the resistance less than 3 ohms? Yes GO TO C9 No REPAIR the circuit.

C9 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both high beams do not operate - LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B103K:01	Left headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B103D:01	Right headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B1D02:11	High Beam Circuit Left: Short to Ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the left high beam output circuit.
B1D02:15	High Beam Circuit Left: Short to Battery or Open Circuit	Continuous memory and on-demand DTC that sets when the BCM detects an open in the left high beam output circuit.
B1D03:11	High Beam Circuit Right: Short to Ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the right high beam output circuit.
B1D03:15	High Beam Circuit Right: Short to Battery or Open Circuit	Continuous memory and on-demand DTC that sets when the BCM detects an open in the right high beam output circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Wiring, Terminals or Connectors
• Multifunction Switch on the LH Steering Column
• Adaptive Front Lighting Module
• Headlamp Assembly
• SCCM
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp assembly for damage.

SPECIFIC TEST D: ONE OR BOTH HIGH BEAM LAMPS DO NOT OPERATE - LIGHT EMITTING DIODE (LED) HEADLAMPS

D1 CHECK THE LOW BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Set the left multifunction switch on the steering column to the HIGH BEAM position and observe the headlamps. Set the left multifunction switch on the steering column to the LOW BEAM position and observe the headlamps. Do the low beams operate? Yes If one high beam does not operate, GO to D3. If both high beams do not operate, GO to D2. No GO to Pinpoint Test B

D2 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH INPUT

Using the diagnostic scan tool, view the SCCM Parameter Identifications (PIDs). Monitor the SCCM high beam switch PID (HIGH_BEAM_SW) while moving the left multifunction switch on the steering column to the HIGH BEAM and LOW BEAM positions. Do the PID values match the left multifunction switch position on the steering column? Yes GO to D10 No INSTALL a new left multifunction switch on the steering column. REFER TO: Left Steering Column Multifunction Switch (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern persists, GO to D9.

D3 CHECK THE HEADLAMP HIGH BEAM CIRCUIT VOLTAGE

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the voltage greater than 11 volts? Yes GO to D7 No GO to D4

D4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE HEADLAMP LOW BEAM CIRCUIT VOLTAGE

Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver). Ignition OFF. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the voltage greater than 11 volts? Yes GO to D8 No GO to D5

D5 CHECK THE HIGH BEAM CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: BCM C2280B. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 Ground Is the resistance greater than 10000 Ohms? Yes GO to D6 No REPAIR the circuit. After the repair: If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation. If any BCM diagnostic trouble codes (DTCs) other than DTC U3000:49 are present, CLEAR the diagnostic trouble codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. CHECK the system for normal operation. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

D6 CHECK THE HIGH BEAM POWER CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 C2280B-11 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 C2280B-6 Is the resistance less than 3 ohms? Yes GO to D10 No REPAIR the circuit.

D7 CHECK THE HEADLAMP GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-2 C1509A-9 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-2 C1510A-9 Is the voltage greater than 11 volts? Yes GO to D8 No REPAIR the faulty circuit.

D8 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate correctly? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

D9 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) OPERATION

Disconnect and inspect all SCCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the SCCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern, INSTALL a new SCCM. REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

D10 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both low beams are on constantly - halogen headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B143B: 11	Lamp Switch Input: Short to Ground	Sets when the BCM detects a short to ground in the headlamp input circuit.
B143K:11	Headlamp Off Input: Short to Ground	Sets when the BCM detects a short to ground in the headlamp off input circuit.
B143D:11	Headlamp Input: Short to Ground	Sets when the BCM detects a short to ground in the headlamp input circuit.
B143E:11	Headlamp switch input: short to ground	Sets when the BCM detects a short to ground in the headlamp switch input circuits.
B1D00:15	Low Beam Left: Short to Battery or Open Circuit	Sets when the BCM detects a short to battery voltage in the left low beam output circuit.
B1D01:15	Low Beam Right: Short to Battery or Open Circuit	Sets when the BCM detects a short to battery voltage in the right low beam output circuit.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Headlight Switch
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp switch for damage.

SPECIFIC TEST E: ONE OR BOTH LOW BEAM LAMPS ARE CONSTANTLY ON - HALOGEN HEADLAMPS

E1 CHECK THE LOW BEAM OPERATION

The ignition is on. Turn the headlamp switch to the OFF position. Observe the operation of the left and right low beams. Are both low beams on? Yes GO to E2 No GO to E7

E2 CHECK THE HEADLAMP SWITCH

Ignition OFF. Disconnect: Headlamp Switch C205. Perform the headlamp switch component test. REFER TO Wiring Diagrams Cell 149 for schematic and connector information. Does the headlamp switch pass the component test? Yes GO to E3 No INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation).

E3 CHECK THE HEADLAMP SWITCH GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-4 Ground Is the resistance less than 3 ohms? Yes GO to E4 No REPAIR the circuit.

E4 CHECK THE HEADLAMP SWITCH CIRCUITS FOR A SHORT TO GROUND

Disconnect: BCM C2280G. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 C205-4 C205-11 C205-4 C205-12 C205-4 C205-13 C205-4 Is the resistance greater than 10000 ohms? Yes GO to E5 No REPAIR the circuit.

E5 CHECK THE HEADLAMP SWITCH CIRCUITS FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 C2280G-16 C205-11 C2280G-2 C205-12 C2280G-15 C205-13 C2280G-21 Is the resistance less than 3 ohms? Yes GO to E6 No REPAIR the circuit.

E6 CHECK THE HEADLAMP SWITCH CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect: Run/Start Relay. Connect: Click to display connectors Positive lead Measurement/Action Negative lead Run/Start Relay Socket Pin 3 Run/Start Relay Socket Pin 5 Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 C205-4 C205-11 C205-4 C205-12 C205-4 C205-13 C205-4 Are there any voltages? Yes REMOVE the fuse jumper wire. REPAIR the circuit. No REMOVE the fuse jumper. GO to E8.

E7 CHECK THE LOW BEAM VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: BCM C2280B. The ignition is on. Observe the headlamps. Does the low beam remain on? Yes REPAIR the circuit. No GO to E8

E8 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both low beams are on constantly - LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B143B: 11	Lamp Switch Input: Short to Ground	On-demand DTC that sets when the BCM detects a short to ground in the headlamp input circuit.
B143K:11	Headlamp Off Input: Short to Ground	On-demand DTC that sets when the BCM detects a short to ground in the headlamp off input circuit.
B143D:11	Headlamp Input: Short to Ground	On-demand DTC that sets when the BCM detects a short to ground in the headlamp input circuit.
B143E:11	Headlamp switch input: short to ground	Continuous memory DTC that sets when the BCM detects a short to ground in the headlamp switch input circuits.
B1447:11	Parking Lamp Switch Input Signal: Circuit Short to Ground	On-demand DTC that sets when the BCM detects a short to ground in the parking lamp input circuit.
B103K:01	Left headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B103D:01	Right headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B1087:00	LIN bus "A": no sub-type information	Continuous memory and on-demand DTC that sets in the HCM when communication with the adaptive front lighting module is lost.
B1088:00	LIN bus "B": no sub-type information	Continuous memory and on-demand DTC that sets in the HCM when communication with the adaptive front lighting module is lost.

Possible Sources

• Wiring, Terminals or Connectors
• Headlight Switch
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp switch for damage.

SPECIFIC TEST F: ONE OR BOTH LOW BEAM LAMPS ARE CONSTANTLY ON - LIGHT EMITTING DIODE (LED) HEADLAMPS

F1 CHECK THE LOW BEAM OPERATION

The ignition is on. Turn the headlamp switch to the OFF position. Observe the operation of the left and right low beams. Are both low beams on? Yes GO to F2 No GO to F7

F2 CHECK THE HEADLAMP SWITCH

Ignition OFF. Disconnect: Headlamp Switch C205. Perform the headlamp switch component test. REFER TO Wiring Diagrams Cell 149 for schematic and connector information. Does the headlamp switch pass the component test? Yes GO to F3 No INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation).

F3 CHECK THE HEADLAMP SWITCH GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-4 Ground Is the resistance less than 3 ohms? Yes GO to F4 No REPAIR the circuit.

F4 CHECK THE HEADLAMP SWITCH CIRCUITS FOR A SHORT TO VOLTAGE

The ignition is on. Disconnect: BCM C2280G. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 C205-4 C205-11 C205-4 C205-12 C205-4 C205-13 C205-4 Is there voltage present? Yes REPAIR the faulty circuit. No GO to F5

F5 CHECK THE HEADLAMP SWITCH CIRCUITS FOR A SHORT TO GROUND

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 Ground C205-11 Ground C205-12 Ground C205-13 Ground Is the resistance greater than 10000 ohms? Yes GO to F6 No REPAIR the faulty circuit.

F6 CHECK THE HEADLAMP SWITCH CIRCUITS FOR AN OPEN

Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-10 C2280G-16 C205-11 C2280G-2 C205-12 C2280G-15 C205-13 C2280G-21 Is the resistance less than 3 ohms? Yes GO to F12 No REPAIR the faulty circuit.

F7 CHECK THE HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on. Using the diagnostic scan tool, perform the HCM self-test. Is DTC B103C:01 or B103D:01 present? Yes GO to F11 No GO to F8

F8 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: HCM C2129. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C2129-10 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C2129-21 Ground Is there voltage present? Yes REPAIR the circuit. No GO to F9

F9 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C2129-10 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C2129-21 Ground Is the resistance greater than 10000 Ohms? Yes GO to F10 No REPAIR the circuit.

F10 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C2129-10 C1509A-13 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C2129-21 C1510A-13 Is the resistance less than 3 ohms? Yes GO to F13 No REPAIR the circuit.

F11 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate correctly? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

F12 CHECK THE BCM (BODY CONTROL MODULE) FOR PROPER OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

F13 CHECK THE HCM (HEADLAMP CONTROL MODULE) FOR PROPER OPERATION

Disconnect and inspect the HCM connector. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the HCM connector. Make sure it is properly seated and latched. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new HCM. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both high beams are on constantly - halogen headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B1D02:15	Left high beam: short to battery or open circuit	Set when the BCM detects an open in the left high beam output circuit.
B1D03:15	Right high beam: short to battery or open	Set when the BCM detects an open in the right high beam output circuit.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Multifunction Switch on the LH Steering Column
• SCCM
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the LH multifunction switch on the steering column for damage.

SPECIFIC TEST G: ONE OR BOTH HIGH BEAM LAMPS ARE CONSTANTLY ON - HALOGEN HEADLAMPS

G1 CHECK THE HIGH BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Set the left multifunction switch on the steering column to the LOW BEAM position and observe the headlamps. Observe the left and right high beam operation. Do both high beams remain on? Yes GO to G2 No GO to G3

G2 CHECK THE MULTIFUNCTION SWITCH INPUT

Using a scan tool, view the SCCM Parameter Identifications (PIDs). Monitor the SCCM headlamp switch mode PID (HEADLAMP_SW) while moving the left multifunction switch on the steering column to the FLASH-TO-PASS, HIGH BEAM and LOW BEAM positions. Do the PID values match the left multifunction switch position on the steering column? Yes GO to G5 No INSTALL a new left multifunction switch on the steering column. REFER TO: Left Steering Column Multifunction Switch (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern persists, GO to G4.

G3 CHECK THE HIGH BEAM VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: BCM C2280B. The ignition is on. Observe the headlamps. Does the high beam remain on? Yes REPAIR the circuit. No GO to G5

G4 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) FOR PROPER OPERATION

Disconnect and inspect all SCCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the SCCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern, INSTALL a new SCCM. REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

G5 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One or both high beams are on constantly - LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B103K:01	Left headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B103D:01	Right headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.

Possible Sources

• Multifunction Switch on the LH Steering Column
• SCCM
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the LH multifunction switch on the steering column for damage.

SPECIFIC TEST H: ONE OR BOTH HIGH BEAM LAMPS ARE CONSTANTLY ON - LIGHT EMITTING DIODE (LED) HEADLAMPS

H1 CHECK HIGH BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Set the left multifunction switch on the steering column to the LOW BEAM position and observe the headlamps. Observe the left and right headlamp operation. Do both high beams remain on? Yes GO to H2 No GO to H4

H2 CHECK THE LEFT (LH) MULTIFUNCTION SWITCH INPUT

Using the diagnostic scan tool, view the SCCM Parameter Identifications (PIDs). Monitor the SCCM high beam switch PID (HIGH_BEAM_SW) while moving the left multifunction switch on the steering column to the HIGH BEAM and LOW BEAM positions. Do the PID values match the left multifunction switch position on the steering column? Yes GO to H5 No INSTALL a new LH multifunction switch on the steering column. REFER TO: Multifunction Switch - LH Steering Column (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern still exists, GO to H3

H3 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) OPERATION

Disconnect and inspect all SCCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the SCCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern, INSTALL a new SCCM. REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

H4 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate correctly? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

H5 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

Flash-to-Pass function is inoperative

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Possible Sources

• Multifunction switch
• SCCM

Visual Inspection and Preliminary Diagnosis

• Inspect the LH multifunction switch on the steering column for damage.

SPECIFIC TEST I: FLASH-TO-PASS FEATURE DOES NOT OPERATE

I1 CHECK THE HIGH BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Turn the high beam on and off using the high beam function of the LH multifunction switch on the steering column. Does the high beam operate correctly? Yes GO to I2. No GO to Pinpoint Test C

I2 CHECK THE MULTIFUNCTION SWITCH INPUT

Using a scan tool, view the SCCM Parameter Identifications (PIDs). Monitor the SCCM headlamp switch PID (HEADLAMP_SW) while moving the LH multifunction switch on the steering column to the FLASH-TO-PASS position. Do the PID values match the left multifunction switch position on the steering column? Yes GO to I4 No INSTALL a new LH multifunction switch on the steering column. REFER TO: Multifunction Switch - LH Steering Column (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). CHECK the system for normal operation. If the concern still exists, GO to I3

I3 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) OPERATION

Disconnect and inspect all SCCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the SCCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern, INSTALL a new SCCM. REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

I4 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

Automatic high beam function inoperative

Normal Operation and Fault Symptoms

The IPMA controls the automatic high beam function when it is active. The IPMA turns on the high beams when the following conditions are met:

• The function has been enabled using the message center.
• The auto lamp function has turned on the exterior lamps.
• The fog lamps are off.
• The vehicle speed is above 51 km/h.
• The IPMA determines that the ambient light conditions are dark enough.
• The IPMA does not detect any light sources that can be interpreted as vehicle headlamps.

The IPMA turns off the high beams when any of the following occurs:

• The IPMA detects any light source that can be interpreted as an illuminated vehicle headlamp.
• The IPMA determines that the ambient light conditions are not dark enough.
• The vehicle speed falls below 44 km/h.
• The fog lamps are on.
• The auto lamps are turned off.
• The IPMA determines that the view is blocked.

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B11C7:46	High beam sensor: calibration/parameter memory failure	Set when the IPMA detects a software calibration problem.
B11C7:97	High beam sensor: component or system operation sticking or binding	Set when the IPMA detects a blockage in front of the high beam sensor.

Possible Sources

• Debris on the windshield.
• IPMA (Interior Rearview Mirror Component)

SPECIFIC TEST J: AUTOMATIC HIGH BEAM FEATURE DOES NOT OPERATE

NOTE: In cold weather conditions (4 °C [40°F] or lower), the automatic high beam is disabled for 10 minutes to allow the windshield heater to clear the windshield in front of the high beam camera.

J1 CHECK THE HIGH BEAM LAMP OPERATION

Set the headlamp switch to the HEADLAMPS position. Set the left multifunction switch on the steering column to the HIGH BEAM position, while observing the headlamps. Do the high beam headlamps illuminate? Yes GO to J2 No GO to Pinpoint Test C

J2 CHECK THE IPMA (IMAGE PROCESSING MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on. Using a scan tool, perform the IPMA self-test. Is DTC B11C7:97 present? Yes GO to J4 No GO to J3

J3 PERFORM THE IPMA (IMAGE PROCESSING MODULE A) PMI (PROGRAMMABLE MODULE INSTALLATION) AND CHECK

Perform the IPMA PMI. REFER TO: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation). Clear the diagnostic trouble codes (DTCs). Repeat the self-test. Is the concern still present? Yes INSTALL a new interior rearview mirror. REFER TO: Interior Rearview Mirror (501-09 Mirrors, Removal and Installation). No The system is currently operating correctly.

J4 VERIFY THE AUTOMATIC HIGH BEAM SENSOR IS NOT BLOCKED

Visually check that the automatic high beam sensor is not blocked. Sources of blockage may include: stickers, window decals or tags. non-factory window tint. Is the automatic high beam sensor blocked? Yes If possible, REMOVE the blockage. CHECK the system for normal operation. If the blockage cannot be removed, CHECK the automatic high beam operation with the customer. No INSTALL a new interior rearview mirror. REFER TO: Interior Rearview Mirror (501-09 Mirrors, Removal and Installation).

U0100:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0100:00	Lost Communication With ECM/PCM "A": No Sub Type Information	Continuous memory DTC set in the HCM when no data messages are received from the PCM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• PCM
• HS-CAN

SPECIFIC TEST K: U0100:00

K1 CHECK THE SCAN TOOL COMMUNICATION WITH THE PCM (POWERTRAIN CONTROL MODULE)

Connect the scan tool. Verify that a vehicle session can be established using the scan tool. Can a vehicle communication session be established? Yes GO to K2 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

K2 CHECK THE HCM (HEADLAMP CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

The ignition is on. Using the diagnostic scan tool, perform the HCM self-test. Clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0100:00 retrieved again? Yes GO to K3 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

K3 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON ENGINE OFF) / KOER (KEY ON ENGINE RUNNING) SELF-TEST

Using the diagnostic scan tool, perform a PCM self-test. Are any diagnostic trouble codes recorded? Yes Diagnose the PCM DTC. Refer to the appropriate section in group 303 for the procedure. No GO to K4

K4 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) U0100:00

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0100:00 set in the ABS module? Yes Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. . No INSTALL a new HCM.

U0121:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0121:00	Lost Communication with Anti-Lock Braking System (ABS) Control Module: No Sub-Type Information	Continuous memory diagnostic trouble code set in the HCM when no data messages are received from the ABS module through the GWM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• ABS Module
• HS-CAN

SPECIFIC TEST L: U0121:00

L1 VERIFY THE CUSTOMER CONCERN

The ignition is on. Make sure the observed symptom is present. Is the observed symptom present? Yes GO to L2 No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

L2 CHECK THE COMMUNICATION NETWORK

Using a scan tool, perform the network test. Does the ABS module pass the network test? Yes GO to L3 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

L3 PERFORM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST

Using the diagnostic scan tool, perform a self-test of the ABS module. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes Refer to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). No GO to L4

L4 RECHECK HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0121:00 still present? Yes GO to L5 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

L5 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) U0121:00 SET IN OTHER MODULES

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0121:00 set in the BCM? Yes INSTALL a new ABS module. REFER TO: Anti-Lock Brake System (ABS) Module (206-09 Anti-Lock Brake System (ABS) and Stability Control System, Removal and Installation). No INSTALL a new HCM.

U0140:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0140:00	Lost Communication With Body Control Module: No Sub Type Information	Continuous memory diagnostic trouble code set in the HCM when no data messages are received from the BCM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• BCM
• HS-CAN

SPECIFIC TEST M: U0140:00

M1 CHECK CUSTOMER CONCERN

The ignition is on. Make sure the observed symptom is present. Is the observed symptom present? Yes GO to M2 No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

M2 CHECK THE COMMUNICATION NETWORK

Using a scan tool, perform the network test. Does the BCM pass the network test? Yes GO to M3 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

M3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST

Using a scan tool, perform the BCM self-test. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). No GO to M4

M4 RECHECK HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0140:00 still present? Yes GO to M5 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

M5 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) U0140:00 SET IN OTHER MODULES

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0140:00 set in any other modules? Yes Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No INSTALL a new HCM.

U0151:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0151:00	Lost Communication with Restraints Control Module: No Sub Type Information	Continuous memory diagnostic trouble code set in the HCM when no data messages are received from the RCM through the GWM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• RCM
• HS-CAN

SPECIFIC TEST N: U0151:00

N1 CONFIRM THE CUSTOMER CONCERN

The ignition is on. Make sure the observed symptom is present. Is the observed symptom present? Yes GO to N2 No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

N2 CHECK THE COMMUNICATION NETWORK

Using a scan tool, perform the network test. Does the RCM pass the network test? Yes GO to N3 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

N3 PERFORM RCM (RESTRAINTS CONTROL MODULE) SELF-TEST

Using the diagnostic scanner, perform the RCM self-test. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). No GO to N4

N4 RECHECK HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0151:00 still present? Yes GO to N5 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

N5 CHECK DTC U0151:00 SET IN OTHER MODULES

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0151:00 set in the BCM? Yes INSTALL a new RCM. REFER TO: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). No INSTALL a new HCM.

U0212:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0212:00	Lost Communication with Steering Column Control Module: No Sub Type Information	Continuous memory diagnostic trouble code set in the HCM when no data messages are received from the SCCM through the GWM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• SCCM
• HS-CAN

SPECIFIC TEST O: U0212:00

O1 CONFIRM THE CUSTOMER CONCERN

The ignition is on. Make sure the observed symptom is present. Is the observed symptom present? Yes GO to O2 No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

O2 CHECK THE COMMUNICATION NETWORK

Using a scan tool, perform the network test. Does the SCCM pass the network test? Yes GO to O3 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

O3 PERFORM THE SCCM (STEERING COLUMN CONTROL MODULE) SELF-TEST

Using the diagnostic scan tool, perform the SCCM self-test. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes Refer to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). No GO to O4

O4 RECHECK HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0212:00 still present? Yes GO to O5 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

O5 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) U0212:00 SET IN OTHER MODULES

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0212:00 set in the BCM? Yes INSTALL a new SCCM. REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). No INSTALL a new HCM.

U0253:00

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	Continuous memory diagnostic trouble code set in the HCM when no data messages are received from the APIM through the GWM for 5 seconds or longer.

Possible Sources

• Communication Problem
• Battery Voltage Concern
• APIM
• HS-CAN

SPECIFIC TEST P: U0253:00

P1 VERIFY THE CUSTOMER CONCERN

The ignition is on. Make sure the observed symptom is present. Is the observed symptom present? Yes GO to P2 No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

P2 CHECK THE NETWORK COMMUNICATION

Using a scan tool, perform the network test. Does the APIM pass the network test? Yes GO to P3 No REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

P3 PERFORM THE APIM (SYNC MODULE) SELF-TEST

Using the diagnostic scan tool, perform the APIM self-test. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes CHECK the diagnostic trouble codes (DTCs). Refer to the appropriate section in group 415 for the procedure. No GO to P4

P4 RECHECK THE HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the HCM self-test. Is DTC U0253:00 still present? Yes GO to P5 No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

P5 CHECK THE DTC (DIAGNOSTIC TROUBLE CODE) U0253:00 SET IN OTHER MODULES

Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. The ignition is on. Wait 10 seconds. Using a scan tool, perform a continuous memory self-test. Retrieve continuous memory diagnostic trouble codes (CMDTC) from all modules. Is DTC U0253:00 set in the BCM? Yes INSTALL a new APIM. Refer to the appropriate section in Group 415. No INSTALL a new HCM.

Manual headlamp leveling is inoperative or does not operate correctly - except North America, halogen headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp assembly for damage.
• Inspect the headlamp switch for damage.
• CHECK that fuse BJB 20 (10A) is OK.

SPECIFIC TEST Q: MANUAL HEADLAMP LEVELING DOES NOT OPERATE/OPERATES INCORRECTLY - EXCEPT NORTH AMERICA, HALOGEN HEADLAMPS

Q1 CHECK THE HEADLAMP AIMING

The ignition is on. Set the headlamp switch to the HEADLAMPS position. While observing both headlamps, Press and release the headlamp leveling switch. Adjust the headlamp leveling setting to 4. Press the headlamp leveling switch until it latches. Does any headlamp change beam light? Yes GO to Q3 No GO to Q2

Q2 CHECK THE VOLTAGE AT THE HEADLAMP SWITCH

Ignition OFF. Turn the headlamp switch to the OFF position. Disconnect: Headlamp Switch C205. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-9 Ground Is the voltage greater than 11 volts? Yes GO to Q5 No CHECK BJB fuse 20 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to determine the possible causes of the short circuit.

Q3 CHECK THE HEADLAMP LEVELING MOTOR SUPPLY VOLTAGE CIRCUIT FOR AN OPEN WITH THE ENGINE OFF

Ignition OFF. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-4 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-4 Ground Is the voltage greater than 11 volts? Yes GO to Q4 No REPAIR the circuit.

Q4 CHECK THE HEADLAMP LEVELING MOTOR GROUND CIRCUIT FOR AN OPEN WITH THE ENGINE OFF

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-4 C1509A-12 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-4 C1510A-12 Is the voltage greater than 11 volts? Yes GO to Q5 No REPAIR the circuit.

Q5 CHECK THE HEADLAMP LEVELING CIRCUIT TO THE HEADLAMP LEVELING MOTOR FOR AN OPEN

Disconnect: Headlamp Switch C205 (if not previously disconnected). Disconnect: Left headlamp C1509A and right headlamp C1510A (both inoperative). Disconnect: Left headlamp C1509A (only left inoperative). Disconnect: Right headlamp C1510A (only right inoperative). Action: Click to display the connectors Both or only left not working Positive lead Measurement/Action Negative lead C1509A-14 C205-1 Click to display the connectors Only right not working Positive lead Measurement/Action Negative lead C1510A-14 C205-1 Is the resistance less than 3 ohms? Yes If only the left or right headlamp is inoperative, INSTALL a new headlamp assembly. REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). If both are inoperative, GO to Q6. No REPAIR the circuit.

Q6 CHECK THE HEADLAMP LEVELING CIRCUIT TO THE HEADLAMP LEVELING MOTOR FOR A SHORT TO VOLTAGE

The ignition is on. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-1 Ground Is there voltage present? Yes REPAIR the circuit. No GO to Q7

Q7 CHECK THE HEADLAMP LEVELING CIRCUIT TO THE HEADLAMP LEVELING MOTOR FOR A SHORT TO GROUND

Ignition OFF. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-1 Ground Is the resistance greater than 10000 Ohms? Yes INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation). No REPAIR the circuit.

Automatic headlamp leveling inoperative/not operating properly - except North America, LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B103K:01	Left headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B103D:01	Right headlamp control: general electrical malfunction	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects a component or wiring fault inside the headlamp assembly.
B1087:00	LIN bus "A": no sub-type information	Continuous memory and on-demand DTC that sets in the HCM when communication with the adaptive front lighting module is lost.
B1088:00	LIN bus "B": no sub-type information	Continuous memory and on-demand DTC that sets in the HCM when communication with the adaptive front lighting module is lost.
B1D64:01	Left Headlamp Swivel Motor: General Electrical Failure	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects an actuator fault inside the headlamp assembly.
B1D65:01	Right Headlamp Swivel Motor: General Electrical Failure	Continuous memory and on-demand DTC that is set in the HCM when the Adaptive Front Lighting Module detects an actuator fault inside the headlamp assembly.

Possible Sources

• Fuse
• Wiring, Terminals or Connectors
• Headlamp Assembly
• BCM
• HS-CAN

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp assembly for damage.

SPECIFIC TEST R: AUTOMATIC HEADLAMP LEVELING DOES NOT OPERATE/OPERATES INCORRECTLY - EXCEPT NORTH AMERICA, LIGHT EMITTING DIODE (LED) HEADLAMPS

R1 CHECK LOW BEAM OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS position. Do the low beams operate correctly? Yes GO to R2 No CHECK the low beams. GO to Pinpoint Test B.

R2 CHECK AUTO LAMP OPERATION

The ignition is on. Turn the headlamp switch to AUTO LAMPS. Do the auto lamps operate correctly? Yes CHECK that BJB fuse 20 (10A) is OK. If OK, GO to R3. If not OK, REFER to the Wiring Diagrams manual to determine the possible causes of the short circuit. No CHECK the auto lamps. REFER to: Auto Lamps (417-01 Exterior Lighting, Diagnosis and Testing).

R3 CHECK THE HCM (HEADLAMP CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Turn the headlamp switch to the OFF position. The ignition is on. Using the diagnostic scan tool, perform the HCM self-test. Are DTC B103C:01, B103D:01, B1087:00 or B1088:00 retrieved? Yes For DTC B1087:00 or B1088:00 GO to R5 For DTC B103C:01 or B103D:01 GO to R4 No INSTALL the new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

R4 CHECK THE ADAPTIVE LIGHTING MOTOR VOLTAGE CIRCUITS

Ignition OFF. Disconnect: Left headlamp C1509A (DTC B103C:01) Disconnect: Right headlamp C1510A (DTC B103D:01). The ignition is on. Action: Click to display the connectors DTC B103C:01 Positive lead Measurement/Action Negative lead C1509A-4 Ground Click to display the connectors DTC B103D:01 Positive lead Measurement/Action Negative lead C1510A-4 Ground Is the voltage greater than 11 volts? Yes INSTALL the new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). No REPAIR the circuit.

R5 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: HCM C2129. Disconnect: Left headlamp C1509A (DTC B1087:00) or right headlamp C1510A (DTC B1088:00). The ignition is on. Action: Click to display the connectors DTC B1087:00 Positive lead Measurement/Action Negative lead C2129-10 Ground Click to display the connectors DTC B1088:00 Positive lead Measurement/Action Negative lead C2129-21 Ground Is there voltage present? Yes REPAIR the circuit. No GO to R6

R6 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Action: Click to display the connectors DTC B1087:00 Positive lead Measurement/Action Negative lead C2129-10 Ground Click to display the connectors DTC B1088:00 Positive lead Measurement/Action Negative lead C2129-21 Ground Is the resistance greater than 10000 Ohms? Yes GO to R7 No REPAIR the circuit.

R7 CHECK THE HCM (HEADLAMP CONTROL MODULE) LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

Action: Click to display the connectors DTC B1087:00 Positive lead Measurement/Action Negative lead C2129-10 C1509A-13 Click to display the connectors DTC B1088:00 Positive lead Measurement/Action Negative lead C2129-21 C1510A-13 Is the resistance less than 3 ohms? Yes GO to R8 No REPAIR the circuit.

R8 CHECK THE HCM (HEADLAMP CONTROL MODULE) OPERATION

Disconnect and inspect the HCM connector. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the HCM connector. Make sure it is properly seated and latched. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new HCM. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

One side marker/parking lamp inoperative

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B1499:11	Exterior lamps power supply "A": short to ground	Continuous memory and on-demand DTC that is set when the BCM detects a short to ground in the output voltage circuit of the Adaptive Front Lighting Module.
B1499:15	Exterior lamps power supply "A": short to battery or open	Continuous memory and on-demand DTC that is set when the BCM detects an open in the output voltage circuit of the Adaptive Front Lighting Module.
B149D: 11	Exterior lamps power supply "B": short to ground	Continuous memory and on-demand DTC that is set when the BCM detects a short to ground in the output voltage circuit of the Adaptive Front Lighting Module.
B149D: 15	Exterior lamps power supply "B": short to battery or open circuit	Continuous memory and on-demand DTC that is set when the BCM detects an open in the output voltage circuit of the Adaptive Front Lighting Module.

Possible Sources

• Wiring, Terminals or Connectors
• Headlamp Assembly
• Adaptive Front Lighting Module
• BCM

SPECIFIC TEST S: ONE SIDE MARKER/PARKING LAMP DOES NOT OPERATE

S1 CHECK THE ADAPTIVE FRONT LIGHTING MODULE VOLTAGE CIRCUIT

Ignition OFF. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the voltage greater than 11 volts? Yes GO to S5 No GO to S2

S2 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE ADAPTIVE FRONT LIGHTING MODULE VOLTAGE CIRCUIT

Turn the headlamp switch to the OFF position. Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver). Ignition OFF. The ignition is on. Set the headlamp switch to the HEADLAMPS position. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the voltage greater than 11 volts? Yes CHECK the internal headlamp harness for an open or short, damaged or pushed-out terminals. If the harness is OK, INSTALL a new Adaptive Front Lighting Module. If the harness is not OK, REPAIR the harness. If the harness is not repairable, INSTALL a new headlamp assembly. REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). No GO to S3

S3 CHECK THE ADAPTIVE FRONT LIGHTING MODULE VOLTAGE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Disconnect: BCM C2280B. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the resistance greater than 10000 Ohms? Yes GO to S4 No REPAIR the circuit. After the repair: If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation. If any BCM diagnostic trouble codes (DTCs) other than DTC U3000:49 are present, CLEAR the diagnostic trouble codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. CHECK the system for normal operation. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

S4 CHECK THE ADAPTIVE FRONT LIGHTING MODULE VOLTAGE CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 C2280B-40 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 C2280B-36 Is the resistance less than 3 ohms? Yes GO to S6 No REPAIR the circuit.

S5 CHECK THE ADAPTIVE FRONT LIGHTING MODULE GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 C1509A-9 C1509A-3 C1509A-12 C1509A-3 C1509A-16 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 C1510A-9 C1510A-3 C1510A-12 C1510A-3 C1510A-16 Is the voltage greater than 11 volts? Yes CHECK the internal headlamp harness for an open or short, damaged or pushed-out terminals. If the harness is OK, INSTALL a new Adaptive Front Lighting Module. CHECK the system for normal operation. If the condition still exists, INSTALL a new headlamp assembly. REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). No REPAIR the faulty circuit.

S6 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DRLs inoperative - halogen headlamps not equipped with LED signature/front position lamps

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Possible Sources

• Wiring, Terminals or Connectors
• BCM

SPECIFIC TEST T: DRL (DAYTIME RUNNING LAMPS) DO NOT OPERATE - HALOGEN HEADLAMPS WITHOUT LIGHT EMITTING DIODE (LED) SIDE MARKER/PARKING LAMPS

T1 CHECK HEADLAMP OPERATION

Ignition OFF. Set the headlamp switch to the HEADLAMPS position. Do the low beams operate correctly? Yes GO to T2 No GO to Pinpoint Test A

T2 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DRLs inoperative - halogen headlamps equipped with LED signature/front position lamps and LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B124A:11	Right DRL: Short to Ground	Continuous memory and on-demand DTC that is set when the BCM detects a short to ground on the right DRL voltage supply circuit.
B124A:15	Right DRL: Short to Battery or Open	Continuous memory and on-demand DTC that is set when the BCM detects an open or a short to voltage on the right DRL voltage supply circuit.
B124B:11	Left DRL: Short to Ground	Continuous memory and on-demand DTC that is set when the BCM detects a short to ground on the LH DRL voltage supply circuit.
B124B:15	Left DRL: Short to Battery or Open	Continuous memory and on-demand DTC that is set when the BCM detects an open or a short to voltage on the left DRL voltage supply circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Wiring, Terminals or Connectors
• Adaptive Front Lighting Module
• Headlamp Assembly
• BCM

SPECIFIC TEST U: DRL (DAYTIME RUNNING LAMPS) DO NOT OPERATE - HALOGEN HEADLAMPS WITH LED SIDE MARKER/PARKING LAMPS AND LIGHT EMITTING DIODE (LED) HEADLAMPS

NOTE: Before performing this test, refer to the Description and Operation section in this section to learn about correct DRL operation.

U1 CHECK HEADLAMP OPERATION

The ignition is on. Set the headlamp switch to the HEADLAMPS ON position. Do the low beam headlamps operate? Yes GO to U2 No For halogen headlamps: GO to Pinpoint Test A For LED headlamps: GO to Pinpoint Test B

U2 CHECK THE DRL (DAYTIME RUNNING LAMP) CIRCUIT FOR A VOLTAGE

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Make sure the ambient light is sufficient so the automatic headlamp system does not turn the headlamps on automatically. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the voltage greater than 11 volts? Yes GO to U6 No GO to U3

U3 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE DRL (DAYTIME RUNNING LAMP) CIRCUIT FOR A VOLTAGE

Using a scan tool, perform the BCM self-test. Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver if DTC U1000:00 is present). Ignition OFF. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the voltage greater than 11 volts? Yes GO to U6 No GO to U4

U4 CHECK THE DRL (DAYTIME RUNNING LAMP) CIRCUIT FOR A SHORT TO GROUND

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: BCM C2280C. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is the resistance greater than 10000 Ohms? Yes GO to U5 No REPAIR the circuit. After repair: If no Diagnostic Trouble Codes (DTCs) are present, CHECK the system for normal operation. If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the on-demand self-test (required to enable the lamp output driver if DTC U1000:00 is present). If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

U5 CHECK THE DRL (DAYTIME RUNNING LAMP) CIRCUIT FOR AN OPEN

Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 C2280C-40 Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 C2280C-36 Is the resistance less than 3 ohms? Yes GO to U7 No REPAIR the circuit.

U6 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

U7 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DRL always on - halogen headlamps equipped with LED position lamps / front side marker lamps and LED headlamps

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).

REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
B124A:15	Right DRL: Short to Battery or Open	Continuous memory and on-demand DTC that is set when the BCM detects an open or a short to voltage on the right DRL voltage supply circuit.
B124B:15	Left DRL: Short to Battery or Open	Continuous memory and on-demand DTC that is set when the BCM detects an open or a short to voltage on the left DRL voltage supply circuit.

Possible Sources

• Wiring, Terminals or Connectors
• Adaptive Front Lighting Module
• BCM

SPECIFIC TEST V: DRL (DAYTIME RUNNING LAMPS) ARE ALWAYS ON - HALOGEN HEADLAMPS WITH LED SIDE MARKER/PARKING LAMPS AND LIGHT EMITTING DIODE (LED) HEADLAMPS

NOTE: Before performing this test, refer to the Description and Operation section in this section to learn about correct DRL operation.

V1 CHECK THE BCM (BODY CONTROL MODULE) DRL (DAYTIME RUNNING LAMP) CIRCUIT

Ignition OFF. Disconnect: BCM C2280C. The ignition is on. Do the DRLs remain on? Yes GO to Step 2 No GO to V4

V2 CHECK THE DRL (DAYTIME RUNNING LAMP) CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: Left Headlamp C1509A or Right Headlamp C1510A. The ignition is on. Action: Click to display the connectors LH headlamp Positive lead Measurement/Action Negative lead C1509A-3 Ground Click to display the connectors Right headlamp Positive lead Measurement/Action Negative lead C1510A-3 Ground Is there voltage present? Yes REPAIR the circuit. No GO to V3

V3 CHECK THE ADAPTIVE FRONT LIGHTING MODULE

Remove the suspect Adaptive Front Lighting Module. Replace with a known good Adaptive Front Lighting Module from the opposite headlamp. Clear the Diagnostic Trouble Codes (DTCs), repeat the Self-Test (required to enable the lamp output driver), and cycle the ignition OFF and ON. Verify the system operates normally. Does the suspect headlamp operate? Yes REMOVE the known good Adaptive Front Lighting Module. INSTALL a new Adaptive Front Lighting Module. No REMOVE the known good Adaptive Front Lighting Module. INSTALL a new headlamp assembly. INSTALL a new headlamp assembly. REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

V4 CHECK THE BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the BCM connectors. Make sure they are fully seated and locked. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

C1A03:29, C1A05:29

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Conditions
C1A03:29	Left Front Height Sensor: Incorrect Signal	Continuous memory and on-demand DTC that sets when the HCM detects an invalid reading in the front headlamp leveling sensor feedback circuit.
C1A05:29	Left Rear Height Sensor: Incorrect Signal	Continuous memory and on-demand DTC that sets when the HCM detects an invalid reading in the front headlamp leveling sensor feedback circuit.

Possible Sources

• Wiring, Terminals or Connectors
• Headlamp Level Sensor
• HS-CAN

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp level sensors and linkage for damage.

SPECIFIC TEST W: C1A03:29, C1A05:29

W1 CHECK THE HEADLAMP LEVELING SENSOR VOLTAGE SUPPLY

Ignition OFF. Disconnect: For DTC C1A03:29, front headlamp leveling sensor C1153. Disconnect: For DTC C1A05:29, rear headlamp leveling sensor C3654. The ignition is on. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-3 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-3 Ground Is the voltage approximately 5 volts? Yes GO to W5 No If the voltage is less than 5 volts, GO to W2 If the voltage is greater than 5 volts, GO to W4

W2 CHECK THE HEADLAMP LEVELING SENSOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Disconnect: HCM C2129. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-3 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-3 Ground Is the resistance greater than 10000 Ohms? Yes GO to W3 No REPAIR the circuit.

W3 CHECK THE HEADLAMP LEVELING SENSOR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-3 C2129-8 Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-3 C2129-20 Is the resistance less than 3 ohms? Yes GO to W11 No REPAIR the circuit.

W4 CHECK THE HEADLAMP LEVELING SENSOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: HCM C2129. The ignition is on. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-3 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-3 Ground Is there voltage present? Yes REPAIR the circuit. No GO to W11

W5 CHECK THE HEADLAMP LEVELING SENSOR GROUND CIRCUIT

Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-3 C1153-2 Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-3 C3654-2 Is the voltage approximately 5 volts? Yes GO to W8 No GO to W6

W6 CHECK THE HEADLAMP LEVELING SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: HCM C2129. The ignition is on. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-2 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-2 Ground Is there voltage present? Yes REPAIR the circuit. No GO to W7

W7 CHECK THE HEADLAMP LEVELING SENSOR GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-2 C2129-3 Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-2 C2129-15 Is the resistance less than 3 ohms? Yes GO to W11 No REPAIR the circuit.

W8 CHECK THE HEADLAMP LEVELING SENSOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: HCM C2129. The ignition is on. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-1 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-1 Ground Is there voltage present? Yes REPAIR the circuit. No GO to W9

W9 CHECK THE HEADLAMP LEVELING SENSOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-1 Ground Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-1 Ground Is the resistance greater than 10000 Ohms? Yes GO to W10. No REPAIR the circuit.

W10 CHECK THE HEADLAMP LEVELING SENSOR FEEDBACK CIRCUIT FOR AN OPEN

Action: Click to display the connectors For DTC C1A03:29 Positive lead Measurement/Action Negative lead C1153-1 C2129-17 Click to display the connectors For DTC C1A05:29 Positive lead Measurement/Action Negative lead C3654-1 C2129-5 Is the resistance less than 3 ohms? Yes INSTALL a new headlamp leveling position sensor. CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to W11. No REPAIR the circuit.

W11 CHECK THE HCM (HEADLAMP CONTROL MODULE) OPERATION

Disconnect and inspect the HCM connector. Repair: corrosion (install new connector or terminals - clean module pins) damaged or bent pins - install new terminals/pins backed-out pins - install new pins as necessary Reconnect the HCM connector. Make sure it is properly seated and latched. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new HCM. No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.