Back-Up Lamps. 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
B1277:11	Back-up lamp: short to ground	GO to Pinpoint Test A
B1277:15	Back-up lamp: short to battery or open	If the back-up lamps do not operate, GO to Diagnostic Test A. If the back-up lamps are always on, GO to Diagnostic Test C.
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).

Symptom Chart

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: Back-Up Lamps

Symptom Chart

Pinpoint Tests

All Back-Up Lamps Inoperative

For circuit and connector information, refer to Wiring Diagrams Cell 93.

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

Possible Sources

• Lamp
• Wiring, Terminals or Connectors
• Gear Range Input
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the bulbs and make sure they are in good condition.

A1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) GEAR RANGE PID (PARAMETER IDENTIFICATION)

Apply the parking brake. The ignition is on. Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs). Monitor the Transmission Range (TR) PID. Move the gear selector lever to the REVERSE position. Does the PID indicate reverse gear range when the transmission range selector is not in REVERSE? Yes GO to A2 No Diagnose transmission range concerns. REFER TO: External Controls (307-05A Automatic Transmission External Controls - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).

A2 CHECK THE BACK-UP LAMP VOLTAGE

Ignition OFF. Apply the parking brake. Disconnect: Left Back-Up Lamp C4017 (for vehicles not equipped with liftgate-mounted parking lamps, back-up lamp portion). Disconnect: Left Back-Up Lamp C487 (for vehicles equipped with liftgate-mounted parking lamps, back-up lamp portion). The ignition is on. Place the transmission range selector in the REVERSE position. For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C4017-1 Ground For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C487-3 Ground Is the voltage greater than 11 volts? Yes GO to A6 No GO to A3

A3 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE BACK-UP LAMP VOLTAGE

Place the transmission selector lever in the PARK 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. Place the transmission range selector in the REVERSE position. For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C4017-1 Ground For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C487-3 Ground Is the voltage greater than 11 volts? Yes INSTALL a new back-up lamp. No GO to A4

A4 CHECK THE BACK-UP LAMP POWER CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Disconnect: BCM C2280F. For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C4017-1 Ground For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C487-3 Ground Is the resistance greater than 10000 Ohms? Yes GO to A5 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.

A5 CHECK THE BACK-UP LAMP POWER CIRCUIT FOR AN OPEN

For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C4017-1 C2280F-11 For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C487-3 C2280F-11 Is the resistance less than 3 ohms? Yes GO to A7 No REPAIR the circuit.

A6 CHECK THE BACK-UP LAMP GROUND CIRCUIT FOR AN OPEN

For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C4017-1 C4017-2 For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Positive lead Measurement/Action Negative lead C487-3 C487-4 Is the voltage greater than 11 volts? Yes INSTALL a new back-up lamp. No REPAIR the circuit.

A7 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 Back-Up Lamp Inoperative

For circuit and connector information, refer to Wiring Diagrams Cell 93.

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

• Lamp
• Wiring, Terminals or Connectors
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the bulbs and make sure they are in good condition.

B1 BACK-UP LAMP VOLTAGE CHECK

Ignition OFF. Apply the parking brake. Disconnect: Left Back-Up Lamp C4017 or Right Back-Up Lamp C488, whichever is not operating (for vehicles not equipped with liftgate-mounted parking lamps, back-up lamp portion). Disconnect: Left Back-Up Lamp C487 or Right Back-Up Lamp C4016, whichever is not operating (for vehicles equipped with liftgate-mounted parking lamps, back-up lamp portion). The ignition is on. Move the gear selector lever to the REVERSE position. For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C4017-1 Ground Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C4016-1 Ground For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C487-3 Ground Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C488-3 Ground Is the voltage greater than 11 volts? Yes GO to B2 No GO to B3

B2 CHECK THE BACK-UP LAMP GROUND CIRCUIT FOR AN OPEN

For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C4017-1 C4017-2 Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C4016-1 C4016-2 For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C487-3 C487-4 Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C488-3 C488-4 Is the voltage greater than 11 volts? Yes INSTALL a new back-up lamp. No REPAIR the circuit.

B3 CHECK THE BACK-UP LAMP POWER CIRCUIT FOR AN OPEN

Disconnect: BCM C2280F. For vehicles not equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C4017-1 C2280F-11 Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C4016-1 C2280F-11 For vehicles equipped with liftgate-mounted parking lamps (back-up lamp portion), measure: Click to display connectors Left Back-Up Lamp Positive lead Measurement/Action Negative lead C487-3 C2280F-11 Click to display the connectors Right Back-Up Lamp Positive lead Measurement/Action Negative lead C488-3 C2280F-11 Is the resistance less than 3 ohms? Yes GO to B4 No REPAIR the circuit.

B4 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.

Back-Up Lamps Continuously On

For circuit and connector information, refer to Wiring Diagrams Cell 93.

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

Possible Sources

• Wiring, Terminals or Connectors
• Gear Range Input
• BCM

C1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) TRANSMISSION RANGE PID (PARAMETER IDENTIFICATION)

Apply the parking brake. The ignition is on. Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs). Monitor the Transmission Range (TR) PID. Move the transmission range selector lever to each position. Does the PID indicate reverse when the transmission range selector is not in REVERSE? Yes Diagnose transmission range concerns. REFER TO: External Controls (307-05A Automatic Transmission External Controls - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing). No GO to C2

C2 CHECK THE BACK-UP LAMP POWER CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: BCM C2280F. The ignition is on. Is one of the back-up lamps still on? Yes REPAIR the faulty circuit. No GO to C3

C3 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.