Ford Escape Quiz
Powertrain

Diagnosis and Testing - All-Wheel Drive Systems

In this manual: Powertrain
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~56min read
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Diagnostic Trouble Code (DTC) 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).


Module Trouble Code Description Action
All-wheel drive C0090:16 4WD/AWD Power Transfer Unit Actuator: Circuit Voltage Below Threshold GO to Pinpoint Test A
All-wheel drive C0090:18 4WD/AWD Power Transfer Unit Actuator: Circuit Current Below Threshold GO to Pinpoint Test A
All-wheel drive C0090:19 4WD/AWD Power Transfer Unit Actuator: Circuit Current Above Threshold GO to Pinpoint Test A
All-wheel drive C0090:71 4WD/AWD Power Transfer Unit Actuator: Stuck GO to Pinpoint Test A
All-wheel drive C0091:17 4WD/AWD Power Transfer Unit Position Sensor 'A': Circuit Voltage Above Threshold GO to Pinpoint Test B
All-wheel drive C0091:32 4WD/AWD Power Transfer Unit Position Sensor 'A': Low Signal Time Below Minimum GO to Pinpoint Test B
All-wheel drive C0091:33 4WD/AWD Power Transfer Unit Position Sensor 'A': Low Signal Time Above Maximum GO to Pinpoint Test B
All-wheel drive C0091:38 4WD/AWD Power Transfer Unit Position Sensor 'A': Incorrect Signal Frequency GO to Pinpoint Test B
All-wheel drive C0091:92 4WD/AWD Power Transfer Unit Position Sensor 'A': Malfunction or Incorrect Operation GO to Pinpoint Test B
All-wheel drive C0092:17 4WD/AWD Power Transfer Unit Position Sensor 'B': Circuit Voltage Above Threshold GO to Pinpoint Test C
All-wheel drive C0092:32 4WD/AWD Power Transfer Unit Position Sensor 'B': Low Signal Time Below Minimum GO to Pinpoint Test C
All-wheel drive C0092:33 4WD/AWD Power Transfer Unit Position Sensor 'B': Low Signal Time Above Maximum GO to Pinpoint Test C
All-wheel drive C0092:38 4WD/AWD Power Transfer Unit Position Sensor 'B': Incorrect Signal Frequency GO to Pinpoint Test C
All-wheel drive C0092:92 4WD/AWD Power Transfer Unit Position Sensor 'B': Malfunction or Incorrect Operation GO to Pinpoint Test M
All-wheel drive C0093:16 4WD/AWD Power Transfer Unit Temperature Sensor: Circuit Voltage Below Threshold GO to Pinpoint Test D
All-wheel drive C0093:17 4WD/AWD Power Transfer Unit Temperature Sensor: Circuit Voltage Above Threshold GO to Pinpoint Test D
All-wheel drive C0093:92 4WD/AWD Power Transfer Unit Temperature Sensor: Malfunction or Incorrect Operation GO to Pinpoint Test D
All-wheel drive C0095:07 4WD/AWD Rear Differential Actuator 'A': Mechanical Malfunction GO to Pinpoint Test I
All-wheel drive C0095:18 4WD/AWD Rear Differential Actuator 'A': Circuit Current Below Threshold GO to Pinpoint Test I
All-wheel drive C0095:19 4WD/AWD Rear Differential Actuator 'A': Circuit Current Above Threshold GO to Pinpoint Test I
All-wheel drive C0095:44 4WD/AWD Rear Differential Actuator 'A': Data Memory Failure GO to Pinpoint Test N
All-wheel drive C0095:71 Rear Drive Unit Actuator 4WD/AWD 'A': Actuator Stuck GO to Pinpoint Test I
All-wheel drive C0095:92 Rear Drive Unit Actuator 4WD/AWD 'A': Performance or Incorrect Operation GO to Pinpoint Test I
All-wheel drive C0095:99 Rear Drive Unit Actuator 4WD/AWD 'A': Learning Limit Exceeded GO to Pinpoint Test I
All-wheel drive C0096:54 4WD/AWD Rear Drive Unit Actuator 'A' Data: Calibration Missing GO to Pinpoint Test N
All-wheel drive C0099:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Short to Ground or Open Circuit GO to Pinpoint Test G
All-wheel drive C0099:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Circuit Voltage Below Threshold GO to Pinpoint Test G
All-wheel drive C0099:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Circuit Voltage Above Threshold GO to Pinpoint Test G
All-wheel drive C009A:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Short to Ground or Open Circuit GO to Pinpoint Test G
All-wheel drive C009A:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Circuit Voltage Below Threshold GO to Pinpoint Test G
All-wheel drive C009A:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Circuit Voltage Above Threshold GO to Pinpoint Test G
All-wheel drive C009B:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Short to Ground or Open Circuit GO to Pinpoint Test G
All-wheel drive C009B:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Circuit Voltage Below Threshold GO to Pinpoint Test G
All-wheel drive C009B:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Circuit Voltage Above Threshold GO to Pinpoint Test G
All-wheel drive C009C:00 4WD/AWD Rear Drive Unit Actuator Position Sensor "A" Ratio: No Subtype Information GO to Pinpoint Test G
All-wheel drive C00A1:08 Powertrain Control Module: Bus Signal/Message Failures GO to Pinpoint Test E
All-wheel drive C00A1:46 Drive Control Module: Calibration/Parameter Memory Failure GO to Pinpoint Test E
All-wheel drive C00A1:57 Transmission Control Module: Invalid/Incompatible Software Component GO to Pinpoint Test E
All-wheel drive C00A1: F1 Drive Control Module: Ethernet 2 Failure GO to Pinpoint Test E
All-wheel drive C00A2:01 Transmission Control Module Power Transfer Unit Control Circuit Driver: General Electrical Failure GO to Pinpoint Test E
All-wheel drive C00A2:19 Powertrain Control Module Power Transfer Unit Control Circuit Driver: Circuit Current Above Threshold GO to Pinpoint Test A
All-wheel drive C00A2:1C Transmission Control Module Power Transfer Unit Control Circuit Driver: Circuit Voltage Out of Range GO to Pinpoint Test B
All-wheel drive C00A2:49 Transmission Control Module Power Transfer Unit Control Circuit Driver: Internal Electronic Failure GO to Pinpoint Test E
All-wheel drive C00A2:4B Transmission Control Module Power Transfer Unit Control Circuit Driver: Overtemperature GO to Pinpoint Test E
All-wheel drive C00A2:96 Powertrain Control Module Power Transfer Unit Control Circuit Driver: Internal Component Failure GO to Pinpoint Test E
All-wheel drive C00A3:01 Transmission Control Module Rear Drive Unit 'A' Control Circuit Driver: General Electrical Failure GO to Pinpoint Test E
All-wheel drive C00A3:1C Transmission Control Module Rear Drive Unit Control Circuit Driver "A": Circuit Voltage Out of Range GO to Pinpoint Test J
All-wheel drive C00A3:49 Transmission Control Module Rear Drive Unit Control Circuit Driver "A": Internal Electronic Failure GO to Pinpoint Test E
All-wheel drive C00A3:4B Transmission Control Module Rear Drive Unit 'A' Control Circuit Driver: Overtemperature GO to Pinpoint Test E
All-wheel drive C00A3:96 Transmission Control Module Rear Drive Unit "A" Control Circuit Driver: Internal Component Failure GO to Pinpoint Test E
All-wheel drive C05D9:74 4WD/AWD Clutch Control Circuit Performance: Drive Slipping GO to Pinpoint Test I
All-wheel drive C05F0:00 Rear Drive Shaft Speed Sensor Circuit Low Signal Level: No Subtype Information GO to Pinpoint Test H
All-wheel drive C05F1:00 Rear Drive Shaft Speed Sensor Circuit High Signal Level: No Subtype Information GO to Pinpoint Test H
All-wheel drive C05F3:00 Rear Drive Shaft Speed Sensor Circuit: No Subtype Information GO to Pinpoint Test H
All-wheel drive C05F4:00 Rear Drive Shaft Speed Sensor Circuit Range/Performance: No Subtype Information GO to Pinpoint Test H
All-wheel drive P0562:00 System Low Voltage: No Sub-type Information GO to Pinpoint Test E
All-wheel drive P0563:00 System High Voltage: No Sub-type Information GO to Pinpoint Test E
All-wheel drive P0603:00 Keep Alive Memory (KAM) Internal Control Module Error: No Subtype Information GO to Pinpoint Test E
All-wheel drive P0604:00 Internal Control Module Random Access Memory (RAM) Error: No Sub Type Information GO to Pinpoint Test E
All-wheel drive P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub-type Information GO to Pinpoint Test E
All-wheel drive P0607:00 Control Module Performance: No Sub-type Information GO to Pinpoint Test E
All-wheel drive P060A:00 Internal Control Module Monitor Processor Performance: No Subtype Information GO to Pinpoint Test E
All-wheel drive P060B:00 Internal Control Module Analog-to-Digital Processing Performance: No Subtype Information GO to Pinpoint Test E
All-wheel drive P060C:00 Internal Control Module Main Processor Performance: No Subtype Information GO to Pinpoint Test E
All-wheel drive P0630:00 VIN Not Programmed or Mismatched - ECM/PCM: No Sub Type Information GO to Pinpoint Test K
All-wheel drive P064F:00 Unauthorized Software/Calibration Detected: No Sub Type Information GO to Pinpoint Test E
All-wheel drive P068A:00 ECM/PCM Power Relay De-energized Too Early: no subtype information GO to Pinpoint Test E
All-wheel drive P1001:00 KOER Cannot Complete, KOER Aborted: No Sub Type Information GO to Pinpoint Test L
All-wheel drive P1397:00 System Voltage Out of Self-Test Range: No Subtype Information GO to Pinpoint Test L
All-wheel drive P1501:00 Vehicle Speed Sensor Out of Self-Test Range: No Subtype Information GO to Pinpoint Test L
All-wheel drive P160A:00 Control Module Vehicle Configuration Options Reconfiguration Error: No Sub Type Information GO to Pinpoint Test K
All-wheel drive P1674:00 Control Module Software Corrupted: No Subtype Information GO to Pinpoint Test E
All-wheel drive P1705:00 Transmission Range Circuit Does Not Indicate Park/Neutral During Self-Test: No Subtype Information GO to Pinpoint Test L
All-wheel drive U0100:00 Lost Communication with ECM/PCM 'A': No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0101:00 Lost Communication with TCM: No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0121:00 Lost Communication with Anti-Lock Brake System (ABS) Control Module 'A': No Sub-type Information GO to Pinpoint Test F
All-wheel drive U0126:00 Lost Communication with Steering Wheel Angle Sensor Module: No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0137:00 Trailer Brake Control Module Communication Lost: No Subtype Information GO to Pinpoint Test F
All-wheel drive U0138:00 All Terrain Control Module Communication Lost: No Subtype Information GO to Pinpoint Test F
All-wheel drive U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0146:00 Lost Communication with Serial Data Gateway 'A': No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0155:00 Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0212:00 Lost Communication with Steering Column Control Module: No Sub Type Information GO to Pinpoint Test F
All-wheel drive U0401:00 Incorrect Data Received from ECM/PCM 'A': No Sub Type Information GO TO Pinpoint Test O
All-wheel drive U0402:00 Incorrect Data Received from TCM: No Sub Type Information GO TO Pinpoint Test O
All-wheel drive U0415:00 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module A: No Sub Type Information GO TO Pinpoint Test O
All-wheel drive U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information GO TO Pinpoint Test O
All-wheel drive U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information GO TO Pinpoint Test O
All-wheel drive U0428:00 Invalid Data Received from Steering Wheel Angle Sensor Module: No Subtype Information GO TO Pinpoint Test O
All-wheel drive U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test K
All-wheel drive U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test K
All-wheel drive U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information GO to Pinpoint Test E

Pinpoint Tests


PINPOINT TEST A: PTU DRIVE MOTOR

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The PTU actuator motor consists of a reversible DC motor, gear reduction unit, drive cam, shift fork and a pair of position sensors. The Four-Wheel Drive Module switches power and ground on the PTUMC+ and PTUMC- circuits to engage or disengage the PTU.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
Four-Wheel Drive C0090:16 4WD/AWD Power Transfer Unit Actuator: Circuit Voltage Below Threshold The Four-Wheel Drive Module will set this DTC when it detects less than 9 V on the PTUMC power supply circuit when commanded to shift. A short to ground in the power supply circuit usually causes this condition. Depending on the command when the fault was detected, the fault may be in the PTUMC+ or PTUMC- circuit.
Four-Wheel Drive C0090:18 4WD/AWD Power Transfer Unit Actuator: Circuit Current Below Threshold PTU motor current was 0 amperes while the PTU motor was commanded on.
Four-Wheel Drive C0090:19 4WD/AWD Power Transfer Unit Actuator: Circuit Current Above Threshold PTU motor current detected (> 1 A) when motor command is 0 % DC.
Four-Wheel Drive C0090:71 4WD/AWD Power Transfer Unit Actuator: Stuck Cam position sensor (A) and shift fork position sensor (B) did not indicate movement when the motor drive was commanded. FIRST, REPAIR any PTU position sensor faults.
Four-Wheel Drive C00A2:19 Powertrain Control Module Power Transfer Unit Control Circuit Driver: Circuit Current Above Threshold This DTC is set when the Four-Wheel Drive Module detects excessive current in the PTU (Power Transfer Unit) actuator drive.

Possible Sources

  • PTUMC+ or PTUMC- Open Circuit
  • PTUMC+ or PTUMC- Short to Ground
  • PTUMC+ or PTUMC- Combined
  • PTU Actuator Motor
  • AWD Module
A1 CHECK PTUMC+ AND PTUMC- CIRCUITS FOR OPEN CIRCUIT
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect the PTU Actuator Motor C1898C.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUMC-C1898C-1 PTUMC-C3841-14
    PTUMC+ C1898C-2 PTUMC-C3841-13

Is the resistance less than 3 ohms?
Yes GO to A2
No REPAIR the open circuit.
A2 CHECK PTUMC+ AND PTUMC- CIRCUITS FOR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect the PTU Actuator Motor C1898C.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUMC-C1898C-1 Ground
    PTUMC+ C1898C-2 Ground

Is the resistance greater than 10000 ohms?
Yes GO to A3
No REPAIR the short to ground.
A3 CHECK FOR A SHORT TO GROUND PTUMC+ AND PTUMC-
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect the PTU Actuator Motor C1898C.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUMC-C1898C-1 PTUMC+ C1898C-2

Is the resistance greater than 10000 Ohms?
Yes For DTC C00A2:19 , CHECK OASIS for any applicable TSBs, GSBs, SSMs or FSAs. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation). For DTC C0090:xx , INSTALL a new PTU drive motor.
REFER TO: Power Transfer Unit Drive Motor (307-07B Power Transfer Unit, 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1), Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07C Power Transfer Unit — 2 L EcoBoost (177 kW/240 L PS) — MI4, Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07D Power Transfer Unit, Removal and Installation).
No REPAIR the short circuit as required.
PINPOINT TEST B: C0091:17, C0091:32, C0091:33, C0091:38, C0091:92, C00A2:1C

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

Two position sensors are located inside the PTU motor assembly, one for the cam and one for the shift fork. Both Hall-effect sensors share a common power supply and ground.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All-Wheel Drive C0091:17 4WD/AWD Power Transfer Unit Position Sensor 'A': Circuit Voltage Above Threshold This DTC sets when the AWD module detects that the PTU cam position sensor signal voltage exceeds the threshold value.
All-Wheel Drive C0091:32 4WD/AWD Power Transfer Unit Position Sensor 'A': Low Signal Time Below Minimum This DTC sets when the PTU cam position sensor signal is < 10% DC.
All-Wheel Drive C0091:33 4WD/AWD Power Transfer Unit Position Sensor 'A': Low Signal Time Above Maximum This DTC sets when the AWD module detects that the PTU cam position sensor signal is > 90% DC.
All-Wheel Drive C0091:38 4WD/AWD Power Transfer Unit Position Sensor 'A': Incorrect Signal Frequency This DTC sets when the AWD module detects that the PTU cam position sensor frequency is outside the range of 1 kHz +/- 150 Hz.
All-Wheel Drive C0091:92 4WD/AWD Power Transfer Unit Position Sensor 'A': Malfunction or Incorrect Operation This DTC sets when the system is on/off and the cam sensor is not within the expected range for this position.
All-Wheel Drive C00A2:1C Transmission Control Module Power Transfer Unit Control Circuit Driver: Circuit Voltage Out of Range This DTC sets when the AWD module detects a voltage outside 4.7–5.29 V (AWD connector pin 25).

Possible Sources

  • Open circuits PTUPS+, PTUPS-, PTUCP, short to ground, short to voltage
  • PTU Actuator Motor
  • AWD Module
B1 CHECK FOR SHIFT FORK POSITION (B) DTCs
  • The ignition is on.

Was DTC C0092 "Shift Fork Position (B)" stored?
Yes The sensors share the same power and signal return circuits. GO to B2.
No The concern is related to the cam position sensor (A) signal. GO to B6.
B2 CHECK SENSOR VREF AND SIGNAL RETURN CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Disconnect AWD module C3841.
  • Inspect the harness connector for damage.
  • The ignition is on.
  • Action:
    Positive lead Measurement/Action Negative lead
    C1898A-1 C3841-25
    C1898A-4 C3841-23

Is the resistance less than 3 ohms?
Yes GO to B5
No REPAIR the open circuit.
B3 CHECK SENSOR VREF FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect PTU position sensors C1898A.
  • Disconnect AWD module C3841.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-25 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to B4
No REPAIR the short to ground.
B4 CHECK SENSOR VREF AND SIGNAL RETURN CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Disconnect AWD module C3841.
  • The ignition is on.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-25 Ground
    C3841-23 Ground

Is there voltage present?
Yes REPAIR the short to voltage.
No GO to B5
B5 CHECK AWD MODULE VREF
  • Ignition OFF.
  • Disconnect PTU position sensors C1898A.
  • Connect AWD module C3841.
  • The ignition is on.
  • Action:
    Positive lead Measurement/Action Negative lead
    C1898A-1 Ground

Is the voltage within 4.7–5.29 V?
Yes INSTALL a new PTU drive motor.
REFER TO: Power Transfer Unit Drive Motor (307-07B Power Transfer Unit, 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1), Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07C Power Transfer Unit — 2 L EcoBoost (177 kW/240 L PS) — MI4, Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07D Power Transfer Unit, Removal and Installation).
No INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
B6 CAM POSITION SENSOR (A) SIGNAL FOR AN OPEN
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Inspect the connector for damage.
  • Disconnect AWD module C3841.
  • Inspect the connector for damage.
  • Action:
    Positive lead Measurement/Action Negative lead
    C1898A-2 C3841-26

Is the resistance less than 3 ohms?
Yes GO to B7
No REPAIR the open circuit.
B7 CHECK CAM POSITION SENSOR (A) SIGNAL FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Disconnect AWD module C3841.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-26 Ground

Is the resistance greater than 10000 Ohms?
Yes INSTALL a new PTU drive motor.
REFER TO: Power Transfer Unit Drive Motor (307-07B Power Transfer Unit, 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1), Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07C Power Transfer Unit — 2 L EcoBoost (177 kW/240 L PS) — MI4, Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07D Power Transfer Unit, Removal and Installation).
No REPAIR the short to ground.
PINPOINT TEST C: C0092:17, C0092:32, C0092:33 AND C0092:38

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

Two position sensors are located inside the PTU motor assembly, one for the cam and one for the shift fork. Both Hall-effect sensors share a common power supply and ground.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All-Wheel Drive C0092:17 4WD/AWD Power Transfer Unit Position Sensor 'B': Circuit Voltage Above Threshold This DTC sets when the AWD module detects that the PTU shift fork position sensor signal voltage exceeds the threshold value.
All-Wheel Drive C0092:32 4WD/AWD Power Transfer Unit Position Sensor 'B': Low Signal Time Below Minimum PTU shift fork position sensor signal < 10% DC.
All-Wheel Drive C0092:33 4WD/AWD Power Transfer Unit Position Sensor 'B': Low Signal Time Above Maximum This DTC sets when the AWD module detects that the PTU shift fork position sensor signal is > 90% DC.
All-Wheel Drive C0092:38 4WD/AWD Power Transfer Unit Position Sensor 'B': Incorrect Signal Frequency This DTC sets when the AWD module detects that the PTU shift fork position sensor frequency is outside the range of 1 kHz +/- 40 Hz.

Possible Sources

  • Open circuits PTUPS+, PTUPS-, PTUCP, short to ground, short to voltage
  • PTU Actuator Motor
  • AWD Module
C1 CHECK CAM POSITION SENSOR (A) DTCs
  • Review the continuous DTCs retrieved from the AWD module.

Was DTC C0091 "Cam Position (A)" stored?
Yes The sensors share the same power and signal return circuits. GO to B-series diagnostic test.
No The concern is related to the shift fork position sensor (B) signal. GO to C2.
C2 SHIFT FORK POSITION SENSOR (B) SIGNAL FOR AN OPEN
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Inspect the harness connector for damage.
  • Disconnect AWD module C3841.
  • Inspect the harness connector for damage.
  • The ignition is on.
  • Action:
    Positive lead Measurement/Action Negative lead
    C1898A-3 C3841-24

Is the resistance less than 3 ohms?
Yes GO to C3
No REPAIR the open circuit.
C3 SHIFT FORK POSITION SENSOR (B) SIGNAL FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect PTU position sensor C1898A.
  • Disconnect AWD module C3841.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-24 Ground

Is the resistance greater than 10000 Ohms?
Yes INSTALL a new PTU drive motor.
REFER TO: Power Transfer Unit Drive Motor (307-07B Power Transfer Unit, 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1), Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07C Power Transfer Unit — 2 L EcoBoost (177 kW/240 L PS) — MI4, Removal and Installation).
REFER TO: Power Transfer Unit Drive Motor (307-07D Power Transfer Unit, Removal and Installation).
No REPAIR the short to ground.
PINPOINT TEST D: C0093:16, C0093:17 AND C0093:92

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The fluid temperature sensor is located in the PTU cover. This temperature-sensitive device is called a thermistor. The sensor resistance value changes with temperature. The AWD module monitors the voltage at the transfer case fluid temperature sensor to determine PTU fluid temperature.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All-Wheel Drive C0093:16 4WD/AWD Power Transfer Unit Temperature Sensor: Circuit Voltage Below Threshold This DTC sets when the transfer case (4WD) module detects a short to ground in the sensor circuit.
4WD C0093:17 4WD/AWD Power Transfer Unit Temperature Sensor: Circuit Voltage Above Threshold This DTC sets when the 4WD module detects a short to voltage or an open circuit in the sensor circuit.
4WD C0093:92 4WD/AWD Power Transfer Unit Temperature Sensor: Malfunction or Incorrect Operation This DTC sets when the 4WD module detects high voltage in the sensor circuit. PTU out of range failure (performance).

Possible Sources

  • PTUT, PTUC - open circuit, short to ground, short to voltage
  • PTU Fluid Temperature Sensor
  • AWD Module
D1 CHECK PTU TEMPERATURE SENSOR CIRCUITS FOR OPEN
  • Ignition OFF.
  • Disconnect the PTU fluid temperature sensor C1898B.
  • Inspect the connector for damage.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Inspect the connector for damage.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUT C1898B-1 C3841-34
    PTUC C1898B-2 C3841-32

Is the resistance less than 3 ohms?
Yes GO to D2
No REPAIR the open circuit.
D2 CHECK PTU TEMPERATURE SENSOR CIRCUITS FOR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the PTU fluid temperature sensor C1898B.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUT C1898B-1 Ground
    PTUC C1898B-2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to D3
No REPAIR the short to ground.
D3 CHECK PTU TEMPERATURE SENSOR CIRCUITS FOR SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the PTU fluid temperature sensor C1898B.
  • Disconnect the Four-Wheel Drive Module C3841.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    PTUT C1898B-1 Ground
    PTUC C1898B-2 Ground

Is there voltage present?
Yes REPAIR the short to voltage.
No GO to D4
D4 CHECK PTU TEMPERATURE SENSOR RESISTANCE
  • Ignition OFF.
  • Disconnect the PTU temperature sensor C1898B.
  • Action:
    Positive lead Measurement/Action Negative lead
    Component side, pin 1 Component side, pin 2
    Temperature C Temperature F MIN Ohms NOM Ohms MAX Ohms
    -40 -40 2.96M 3.466M 3.9974M
    -30 -22 1.565M 1.817657M 2.082M
    -20 -4 861.54K 0.993M 1.130M
    -10 14 492.02K 563.3K 637.9K
    0 32 290.59K 330.5K 372.4K
    10 50 176.98K 200.1K 224.4K
    20 68 110.88K 124.7K 139.2K
    25 77 88.626K 99.459K 110.7K
    30 86 71.296K 79.805K 88.69K
    40 104 46.954K 52.314K 57.93K
    50 122 31.615K 35.071K 38.674K
    60 140 21.728K 24.005K 26.378K
    70 158 15.219K 16.750K 18.344K
    80 176 10.850K 11.899K 12.989K
    90 194 7864 8594 9353
    100 210 5787 6304 6841
    110 230 4319 469 5078
    120 248 3268 3539 3820
    130 266 2503 2703 2911
    140 284 1940 2089 2244
    150 302 1520 1633 1751
    160 360 1204 1290 1380

Does the temperature/resistance meet specification?
Yes INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
No INSTALL a new PTU fluid temperature sensor. Torque: 150 lb-in (17 N·m)
PINPOINT TEST E: AWD MODULE POWER, GROUND OR INTERNAL FAULT

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The 4WD module performs self-diagnostic checks. If it detects a fault with internal hardware, programming, or performance, it will set a DTC. Some internal faults may be caused by module power or ground supply problems.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
4WD C00A1:08 Powertrain Control Module: Bus Signal/Message Failures The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
4WD C00A1:46 Drive Control Module: Calibration/Parameter Memory Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
4WD C00A1:57 Transmission Control Module: Invalid/Incompatible Software Component The 4WD module has detected an internal software error.
4WD C00A1:F1 Drive Control Module: Ethernet 2 Failure This DTC indicates that the 4WD module has entered a fail-safe state.
4WD C00A2:01 Transmission Control Module Power Transfer Unit Control Circuit Driver: General Electrical Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
4WD C00A2:49 Transmission Control Module Power Transfer Unit Control Circuit Driver: Internal Electronic Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
4WD C00A2:4B Transmission Control Module Power Transfer Unit Control Circuit Driver: Overtemperature The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
4WD C00A2:96 Powertrain Control Module Power Transfer Unit Control Circuit Driver: Internal Component Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive C00A3:01 Transmission Control Module Rear Drive Unit 'A' Control Circuit Driver: General Electrical Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive C00A3:49 Transmission Control Module Rear Drive Unit Control Circuit Driver "A": Internal Electronic Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive C00A3:4B Transmission Control Module Rear Drive Unit 'A' Control Circuit Driver: Overtemperature The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive C00A3:96 Transmission Control Module Rear Drive Unit "A" Control Circuit Driver: Internal Component Failure The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P0562:00 System Low Voltage: No Sub-type Information The All Wheel Drive module detected battery voltage below 9 volts on the power supply circuit.
All Wheel Drive P0563:00 System High Voltage: No Sub-type Information The All Wheel Drive module detected battery voltage above 16 volts on the power supply circuit.
All Wheel Drive P0603:00 Keep Alive Memory (KAM) Internal Control Module Error: No Subtype Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P0604:00 Internal Control Module Random Access Memory (RAM) Error: No Sub Type Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub-type Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P0607:00 Control Module Performance: No Sub-type Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P060A:00 Internal Control Module Monitor Processor Performance: No Subtype Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P060B:00 Internal Control Module Analog-to-Digital Processing Performance: No Subtype Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P060C:00 Internal Control Module Main Processor Performance: No Subtype Information The 4WD module has detected an internal fault that may have been caused by a module voltage supply problem.
All Wheel Drive P064F:00 Unauthorized Software/Calibration Detected: No Sub Type Information The 4WD module has detected an internal software error.
All Wheel Drive P068A:00 ECM/PCM Power Relay De-energized Too Early: no subtype information The All Wheel Drive module detected 0 volts on the power supply circuit earlier than expected.
All Wheel Drive P1674:00 Control Module Software Corrupted: No Subtype Information The 4WD module has detected an internal software error.
All Wheel Drive U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information The 4WD module has detected an internal software error.

Possible Sources

  • Vehicle Level Voltage Concern
  • All Wheel Drive Module Power Supply Voltage
  • All Wheel Drive Module Ground
  • AWD Module
E1 CHECK FOR VOLTAGE DTCS IN OTHER MODULES
  • The ignition is on.
  • Enter the following diagnostic mode: CMDTC Self-Test for All Modules.

Are any voltage DTCs set in other modules?
Yes
REFER TO: Charging System - 1.5 L EcoBoost (132 kW/180 L PS) - I3 (Y1) (414-00 Charging System - General Information, Diagnosis and Testing).
REFER TO: Charging System - 2 L EcoBoost (177 kW/240 L PS) - MI4 (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to E3
E2 CHECK THE ALL WHEEL DRIVE (AWD) MODULE GROUND
  • Ignition OFF.
  • Make sure the All Wheel Drive module mounting nuts are tightened. 89 lb-in ( 10 N·m )

Are any fasteners loose?
Yes TIGHTEN the All Wheel Drive module mounting nuts to specification. RECHECK the system for normal operation.
No GO to E3
E3 CHECK THE ALL WHEEL DRIVE (AWD) MODULE POWER SUPPLY VOLTAGE
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Inspect the harness connector for damage. Check that the terminals are not bent, damaged or pushed out of the connector.
  • The ignition is on.
  • Manipulate the harness and suspension (wiggle test) while measuring:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    PWR C3841-1 Ground

Is the voltage greater than 10 volts and remain steady during the harness check?
Yes For hybrid vehicles: GO to E4
For all others, GO to E5
No REPAIR the open circuit.
E4 CHECK THE ALL WHEEL DRIVE (AWD) MODULE GROUND - HYBRID ONLY
  • Disconnect AWD module C3841.
  • Ignition OFF.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-46 Ground

Is the resistance less than 3 ohms?
Yes GO to E5
No REPAIR the open circuit.
E5 VERIFY THE CONCERN IS PRESENT
  • Connect the All Wheel Drive module C3841.
  • The ignition is on.
  • Enter the following diagnostic mode: CMDTC Clear and Retest Self-Test.
  • Ignition OFF.
  • Open and close the driver door to initiate module shutdown.
  • Wait 1 minute for the All Wheel Drive module to enter sleep mode.
  • Start the engine and let it idle for 1 minute.
  • Enter the following diagnostic mode: All Wheel Drive On Demand and CMDTC Self-Test.

Has the voltage or internal fault DTC reset?
Yes INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
No The system is now operating correctly. The concern may have been caused by a module connection. REPAIR the root cause of any connector or terminal concerns.
PINPOINT TEST F: LOSS OF COMMUNICATION WITH OTHER MODULE

REFER TO the Wiring Diagrams Cell 34 for schematic and connector information. REFER TO the Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Symptoms

The AWD module expects to receive network data from other modules over HS-CAN1. The All Wheel Drive system will set a DTC when it has not received messages from the module for more than 12 seconds. Other modules that require data from the suspect module may set a Lost Communication DTC.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive U0100:00 Lost Communication with ECM/PCM 'A': No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0101:00 Lost Communication with TCM: No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0121:00 Lost Communication with Anti-Lock Brake System (ABS) Control Module 'A': No Sub-type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0126:00 Lost Communication with Steering Wheel Angle Sensor Module: No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0137:00 Trailer Brake Control Module Communication Lost: No Subtype Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0138:00 All Terrain Control Module Communication Lost: No Subtype Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0140:00 Lost Communication With Body Control Module: No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0146:00 Lost Communication with Serial Data Gateway 'A': No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0155:00 Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.
All Wheel Drive U0212:00 Lost Communication with Steering Column Control Module: No Sub Type Information The AWD module has not received messages from the suspect module for more than 12 seconds.

Possible Sources

  • Suspect module
  • Battery Voltage Concern
  • HS-CAN1
F1 CHECK FOR LOST COMMUNICATION DTCS IN OTHER MODULES
  • Enter the following diagnostic mode: CMDTC All.

Are any other modules on the vehicle also set with a Lost Communication DTC for the suspect module?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to F2
F2 REVIEW THE CMDTC (CONTINUOUS MEMORY DIAGNOSTIC CODE) FOR LOW VOLTAGE DTCS (DIAGNOSTIC TROUBLE CODES)
  • Check all modules for low voltage DTCs using CMDTC.

Which modules have a low voltage DTC set?
Yes
REFER TO: Charging System - 1.5 L EcoBoost (132 kW/180 L PS) - I3 (Y1) (414-00 Charging System - General Information, Diagnosis and Testing).
REFER TO: Charging System - 2 L EcoBoost (177 kW/240 L PS) - MI4 (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to F3
F3 CHECK THE HS-CAN1 (HIGH-SPEED CONTROLLER AREA NETWORK 1) CONNECTORS
  • Ignition OFF.

  • For wiring diagram and connector information, REFER TO Wiring Diagrams Cell 14.
  • DISCONNECT and INSPECT the HS-CAN1 connectors between the AWD module and the suspect module.
  • Repair:
    • corrosion (INSTALL a new connector or terminals)
    • damaged or bent pins (INSTALL new terminals/pins)
    • pushed-out pins (INSTALL new pins)
  • Reconnect all connectors. Make sure each connector is properly seated and locked.

Is the concern still present?
Yes CHECK for applicable TSB, GSB, SSM or FSA. If a service bulletin exists for this concern, stop this test and follow the bulletin instructions. If none resolves the concern, INSTALL a new suspect module.
No The system is now operating correctly. The concern may have been caused by a module connection. REPAIR the root cause of any connector or terminal concerns.
PINPOINT TEST G: C0099:14, C0099:16, C0099:17, C009A:14, C009A:17, C009B:14, C009B:16, C009B:17 AND C009C:00

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive C0099:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Short to Ground or Open Circuit This DTC sets when the All Wheel Drive module detects an open circuit in the position sensor A circuit.
All Wheel Drive C0099:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Circuit Voltage Below Threshold This DTC sets when the All Wheel Drive module detects a low voltage in the position sensor A circuit.
All Wheel Drive C0099:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "A": Circuit Voltage Above Threshold This DTC sets when the All Wheel Drive module detects a high voltage in the position sensor A circuit.
All Wheel Drive C009A:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Short to Ground or Open Circuit This DTC sets if the AWD module detects an open circuit in the position sensor B circuit.
AWD C009A:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Circuit Voltage Below Threshold This DTC sets if the AWD module detects high voltage in the position sensor B circuit.
AWD C009A:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "B": Circuit Voltage Above Threshold This DTC sets if the AWD module detects high voltage in the position sensor B circuit.
AWD C009B:14 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Short to Ground or Open Circuit This DTC sets if the AWD module detects an open circuit in the position sensor C circuit.
AWD C009B:16 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Circuit Voltage Below Threshold This DTC sets if the AWD module detects low voltage in the position sensor C circuit.
AWD C009B:17 4WD/AWD Rear Drive Unit Actuator "A" Position Sensor "C": Circuit Voltage Above Threshold This DTC sets if the AWD module detects high voltage in the position sensor C circuit.
AWD C009C:00 4WD/AWD Rear Drive Unit Actuator Position Sensor "A" Ratio: No Subtype Information This DTC sets if the AWD module detects a correlation fault with the rear drive unit (RDU) "A" actuator position sensor.

Possible Sources

  • Damaged or backed-out terminals, corrosion, loose wires, and missing or damaged seals
  • RDU Motor Sensor
  • AWD Module
G1 CHECK THE VOLTAGE IN THE CIRCUIT
  • Ignition OFF.
  • Disconnect RDU C4347A.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347A-5 Ground

Is the voltage approximately 5 volts?
Yes GO to G2
No GO to G3
G2 CHECK THE GROUND CIRCUIT
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347A-4 Ground

Is the resistance less than 3 ohms?
Yes GO to G3
No REPAIR the circuit.
G3 CHECK THE SENSOR CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect RDU C4347A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347A-4 C3841-18
    C4347A-5 C3841-35
    C4347A-6 C3841-4
    C4347A-7 C3841-19
    C4347A-8 C3841-5

Is the resistance less than 3 ohms?
Yes GO to G4
No REPAIR the circuit.
G4 CHECK THE SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347A-4 Ground
    C4347A-5 Ground
    C4347A-6 Ground
    C4347A-7 Ground
    C4347A-8 Ground

Is the resistance greater than 10000 ohms?
Yes INSTALL a new RDU.
Refer to: Axle Assembly (205-02 Rear Axle/Differential, Removal and Installation).
No REPAIR the circuit.
PINPOINT TEST H: C05F0:00, C05F1:00, C05F3:00 AND C05F4:00 RDU (REAR DRIVE) SPEED SENSOR

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The RDU propshaft speed sensor is a Hall-effect sensor that provides a signal to the AWD module. The frequency of the signal changes as the propshaft speed changes.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
AWD C05F0:00 Rear Drive Shaft Speed Sensor Circuit Low Signal Level: No Subtype Information This DTC sets if the AWD module detects an open or a short to ground in the RDU speed sensor circuit.
AWD C05F1:00 Rear Drive Shaft Speed Sensor Circuit High Signal Level: No Subtype Information This DTC sets if the AWD module detects a short to power in the RDU speed sensor circuit.
AWD C05F3:00 Rear Drive Shaft Speed Sensor Circuit: No Subtype Information This DTC sets when the AWD module detects that the RDU speed sensor supply voltage is out of range.
AWD C05F4:00 Rear Drive Shaft Speed Sensor Circuit Range/Performance: No Subtype Information This DTC indicates that the AWD module has detected an implausible rear propshaft speed sensor signal. This may be caused by noise generated by the speed sensor, speed sensor wiring harness, or a mechanical fault in the PTU, propshaft, or RDU.

Possible Sources

  • Damaged or backed-out terminals, corrosion, loose wires, and missing or damaged seals
  • RDU Speed Sensor
  • AWD Module
H1 RECHECK THE AWD (ALL WHEEL DRIVE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • AWD Diagnostic Trouble Code Overview.

Are DTCs C05F0:00, C05F1:00, C05F3:00, or C05F4:00 present?
Yes For DTCs C05F0:00, C05F1:00, C05F3:00, GO to H2. For DTC C05F4:00, GO to H7.
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
H2 CHECK THE VOLTAGE AT THE RDU (REAR DRIVE) SPEED SENSOR
  • Disconnect RDU C4347B.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347B-1 Ground

Is the voltage approximately 9 volts?
Yes GO to H3
No GO to H5
H3 CHECK THE SIGNAL RETURN CIRCUIT FOR AN OPEN
  • Disconnect the Four-Wheel Drive Module C3841.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347B-2 C3841-6

Is the resistance less than 3 ohms?
Yes GO to H4
No REPAIR the circuit.
H4 CHECK THE SIGNAL RETURN CIRCUIT FOR A SHORT TO VOLTAGE
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347B-2 Ground

Is any voltage detected?
Yes REPAIR the circuit.
No INSTALL a new RDU speed sensor.
Refer to: Rear Drive (RDU) Speed Sensor (205-02 Rear Axle/Differential, Removal and Installation).
H5 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect the Four-Wheel Drive Module C3841.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347B-1 C3841-7

Is the resistance less than 3 ohms?
Yes GO to H6
No REPAIR the circuit.
H6 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347B-1 Ground

Is the resistance greater than 10000 Ohms?
Yes CHECK OASIS for any applicable TSBs, GSBs, SSMs or FSAs. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new AWD module.
Refer to: All Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L hp) — I3 (Y1)/2 L EcoBoost (177 kW/240 L hp) – MI4 (307-07A All Wheel Drive Systems, Removal and Installation).
Refer to: All Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L hp) (BG) (307-07A All Wheel Drive Systems, Removal and Installation).
No REPAIR the circuit.
H7 RDU (REAR DRIVE) SPEED SENSOR DTC OPERATION
  • Inspect the RDU speed sensor harness and the AWD module for loose connections.
  • CHECK the RDU speed sensor for a loose mounting.

Were any loose connections or a loose sensor repaired?
Yes REPAIR the circuit. CLEAR the DTCs, ROAD TEST the vehicle to verify the concern is resolved.
No INSTALL a new RDU speed sensor.
Refer to: Rear Drive (RDU) Speed Sensor (205-02 Rear Axle/Differential, Removal and Installation).
PINPOINT TEST I: C0095:07, C0095:18, C0095:19, C0095:71, C0095:92, C0095:99 AND C05D9:74 RDU (REAR DRIVE) MOTOR PHASE CIRCUITS

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The rear drive contains a three-phase reversible motor. The motor actuates the clutch in the RDU to engage or disengage all wheel drive. The AWD module controls the motor by supplying power on the RDMC X circuits. The motor position is fed back to the AWD module on the RDMP X circuits. When the AWD module engages, the AWD module will move the motor from a hard stop (clutch fully released) to the clutch kiss point. The kiss point is the maximum clutch engagement point where 0 torque is transmitted through the clutch.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
AWD C0095:07 4WD/AWD Rear Differential Actuator 'A': Mechanical Malfunction This DTC sets when the AWD module attempts to engage the PTU and RDU clutch but a fault occurs that prevents synchronization of the PTU and RDU. Diagnose the more specific DTC first.
AWD C0095:18 4WD/AWD Rear Differential Actuator 'A': Circuit Current Below Threshold This DTC is stored in continuous memory if the RDU motor circuit detects low current when commanded.
AWD C0095:19 4WD/AWD Rear Differential Actuator 'A': Circuit Current Above Threshold This DTC is stored continuously and on demand if the RDU motor circuit detects high current when commanded.
AWD C0095:71 Rear Drive Unit Actuator 4WD/AWD 'A': Actuator Stuck The AWD module sets this DTC if the motor position sensors do not change when the motor is commanded. Resolve all motor position sensor faults before addressing this DTC.
AWD C0095:92 Rear Drive Unit Actuator 4WD/AWD 'A': Performance or Incorrect Operation The AWD module sets this DTC when the motor position sensors indicate the motor is in an implausible position.
AWD C0095:99 Rear Drive Unit Actuator 4WD/AWD 'A': Learning Limit Exceeded This DTC sets when the kiss point learn cannot be completed successfully. Resolve all motor position sensor DTCs before addressing this DTC.
AWD C05D9:74 4WD/AWD Clutch Control Circuit Performance: Drive Slipping This DTC sets when the "A" clutch cannot complete a hard stop. Resolve all engine position sensor DTCs before referring to this DTC.

Possible Sources

  • Contamination in AWD or RDU connector
  • RDMC open circuit
  • RDMC circuit shorted to ground
  • RDMC circuits shorted together
  • RDU
I1 CHECK THE ALL WHEEL DRIVE (AWD) MODULE AND REAR DRIVE UNIT (RDU) ENGINE CONNECTORS FOR CONTAMINATION
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect RDU C4347A.
  • INSPECT the connectors for water intrusion, bent pins, spread terminals, corrosion or damage.

Is there any damage or contamination?
Yes REPAIR as necessary. CLEAR the DTCs and PERFORM a road test.
No GO to I2.
I2 CHECK THE ALL WHEEL DRIVE (AWD) ENGINE CIRCUITS FOR OPEN
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect RDU C4347A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4347A-1 C3841-3
    C4347A-2 C3841-2
    C4347A-3 C3841-30

Is the resistance less than 3 ohms?
Yes GO to I3
No REPAIR the circuit.
I3 CHECK THE ALL WHEEL DRIVE (AWD) ENGINE CIRCUITS FOR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect RDU C4347A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C3841-3 Ground
    C3841-2 Ground
    C3841-30 Ground

Is the resistance greater than 10000 ohms?
Yes GO to I4
No REPAIR the circuit.
I4 CHECK THE ALL WHEEL DRIVE (AWD) ENGINE CIRCUITS FOR SHORT CIRCUIT
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Disconnect RDU C4347A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C3841-3 C3841-2
    C3841-2 C3841-30
    C3841-3 C3841-30

Is the resistance greater than 10000 ohms?
Yes GO to I5
No REPAIR the circuit.
I5 CONFIRM THE CONCERN
  • Ignition OFF.
  • The ignition is on.
  • Clear the AWD module CMDTCs.
    • Road test vehicle:
      • 1. Accelerate from 0 to 30 mph three times.
      • 2. Cruise steadily above 45 mph for 30 seconds.
      • 3. Stop slowly.
      • 4. Turn the ignition off.
      • 5. Repeat the road test 2 times.
  • Retrieve the AWD module CMDTCs.

Is C0095:xx or C005D9:xx set in continuous memory?
Yes INSTALL a new RDU drive. Refer to the appropriate section in Group 205 for the procedure. Perform the RETEST operation. If NO change, INSTALL a new RDU. .
REFER TO: Axle Assembly (205-02 Rear Drive Axle/Differential, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or terminal problems.
PINPOINT TEST J: DTC C00A3:1C

For wiring diagrams and connector information, refer to Cell 34 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The RDU motor contains a 2-wire Hall effect position sensor (RDUPS). The all wheel drive module sends a 5-volt reference voltage, which switches to low when the motor rotates.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive C00A3:1C Transmission Control Module Rear Drive Unit Control Circuit Driver "A": Circuit Voltage Out of Range The all wheel drive module detected a reference voltage outside 4.7-5.29 V (all wheel drive connector pin 35).

Possible Sources

  • RDUPS+, RDUPS- Open circuit, short to voltage
  • RDUPS+ short to ground
  • RDU position sensor (RDU part)
  • All wheel drive module power or ground
  • AWD Module
J1 CHECK THE SENSOR VREF AND SIGNAL RETURN CIRCUITS FOR OPEN
  • Ignition OFF.
  • Disconnect RDU C4347A.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Inspect the harness connectors for damage.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    RDUPS+ C4347A-5 C3841-35
    RDUPS- C4347A-4 C3841-18

Is the resistance less than 3 ohms?
Yes GO to J2
No REPAIR the open circuit.
J2 CHECK THE SENSOR VREF FOR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect RDU C4347A.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    RDUPS+ C3841-35 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to J3
No REPAIR the short to ground.
J3 CHECK THE SENSOR VREF AND SIGNAL RETURN FOR SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect RDU C4347A.
  • Disconnect the Four-Wheel Drive Module C3841.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    RDUPS+ C3841-35 Ground
    RDUPS- C3841-18 Ground

Is there voltage present?
Yes REPAIR the short to voltage.
No GO to J7
J4 CHECK THE ALL WHEEL DRIVE (AWD) MODULE GROUND
  • Ignition OFF.
  • Make sure the All Wheel Drive module mounting nuts are tightened. 89 lb-in ( 10 N·m )

Are any fasteners loose?
Yes TIGHTEN the All Wheel Drive module mounting nuts to specification. RECHECK the system for normal operation.
No GO to J5
J5 CHECK THE ALL WHEEL DRIVE (AWD) MODULE POWER FOR VOLTAGE
  • Ignition OFF.
  • Disconnect the Four-Wheel Drive Module C3841.
  • Inspect the harness connector for damage. Check that the terminals are not bent, damaged or pushed out of the connector.
  • The ignition is on.
  • Manipulate the harness and suspension (wiggle test) while measuring:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    PWR C3841-1 Ground

Is the voltage greater than 10 volts and remain steady during the harness check?
Yes For hybrid vehicles, GO to J6.
For all others, GO to J7.
No REPAIR the open circuit.
J6 CHECK THE ALL WHEEL DRIVE (AWD) MODULE GROUND - HYBRID ONLY
  • Disconnect AWD module C3841.
  • Ignition OFF.
  • Action:
    Positive lead Measurement/Action Negative lead
    C3841-46 Ground

Is the resistance less than 3 ohms?
Yes GO to J7
No REPAIR the open circuit.
J7 CHECK THE ALL WHEEL DRIVE (AWD) MODULE VREF
  • Ignition OFF.
  • Disconnect RDU C4347A.
  • Connect the All Wheel Drive module C3841.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    RDUPS+ C4347A-5 Ground

Is the voltage within 4.7–5.29 V?
Yes INSTALL a new RDU.
Refer to: Axle Assembly (205-02 Rear Axle/Differential, Removal and Installation).
No INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
PINPOINT TEST K: MODULE CONFIGURATION ERRORS

Normal Operation and Fault Symptoms

The new AWD module retains the vehicle identification block (VID) information from the old module during the PMI procedure. The AWD module compares the stored values with the valid values stored in the calibration. If the stored value does not match a valid value, a DTC is stored.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive P0630:00 VIN Not Programmed or Mismatched - ECM/PCM: No Sub Type Information The VIN stored in the AWD module is not a valid VIN for the calibration.
All Wheel Drive P160A:00 Control Module Vehicle Configuration Options Reconfiguration Error: No Sub Type Information The VIN, tire circumference and gear ratio stored in the AWD module do not match valid values.
All Wheel Drive U2100:00 Initial Configuration Not Complete: No Sub Type Information Sets when the all wheel drive module detects that the initial configuration is not complete.
All Wheel Drive U2101:00 Control Module Configuration Incompatible: No Sub Type Information Sets when the all wheel drive module detects a control module configuration incompatibility.

Possible Sources

  • Incomplete PMI procedure on the all wheel drive module
  • Incorrect module replacement
  • AWD Module
K1 PERFORM THE PROGRAMMABLE MODULE INSTALLATION (PMI) MODE ON THE ALL WHEEL DRIVE (AWD) MODULE USING THE AVAILABLE DATA
  • Enter the following diagnostic mode: AWD - Programmable Module Installation.
  • Enter the following diagnostic mode: Clear and retest the all wheel drive module self-test.

Is the DTC set?
Yes INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
No Repair is complete.
PINPOINT TEST L: P1001, P1397, P1501, P1705

Normal Operation and Fault Symptoms

The all wheel drive module KOER self-test runs when requested by the diagnostic scan tool and the engine is running. The test may set certain faults if the self-test conditions are incorrect at any time during the test:

  • Engine running. Broadcast by PCM on HS-CAN1.
  • All wheel drive module voltage is outside normal operating limits. Measured by the all wheel drive module at pin 1.
  • Vehicle speed is 0. Broadcast by GWM on HS-CAN1 from ABS on HS-CAN2.
  • Transmission range in Park (P) or Neutral (N). Broadcast by PCM on HS-CAN1.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive P1001:00 KOER Cannot Complete, KOER Aborted: No Sub Type Information KOER self-test timed out. Test did not complete within 4-1/2 minutes.
All Wheel Drive P1397:00 System Voltage Out of Self-Test Range: No Subtype Information All wheel drive module voltage at pin 1 is outside the allowable range after the self-test starts.
All Wheel Drive P1501:00 Vehicle Speed Sensor Out of Self-Test Range: No Subtype Information Vehicle speed exceeds mph (km/h) after the self-test starts.
All Wheel Drive P1705:00 Transmission Range Circuit Does Not Indicate Park/Neutral During Self-Test: No Subtype Information Transmission range is not in Park or Neutral after the self-test starts.

Possible Sources

  • KOER entry conditions are incorrect when the self-test starts
  • Operator changed the vehicle condition during the self-test
  • Other vehicle system concerns prevented the self-test from completing in time.
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST M: C0092:92

Normal Operation and Fault Symptoms

The all wheel drive module learned a normal fork position that exceeds the threshold. The drive unit and fork assembly and/or PTU are worn or damaged.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
All Wheel Drive C0092:92 4WD/AWD Power Transfer Unit Position Sensor 'B': Malfunction or Incorrect Operation This DTC sets if the system is engaged/disengaged and the fork sensor is not within the expected range for this position.

Possible Sources

  • Internal PTU damage
M1 CHECK THE CONCERN
  • Ignition OFF.
  • The ignition is on.
  • Clear the AWD module CMDTCs.
    • Road test vehicle:
      • 1. Accelerate from 0 to 30 mph three times.
      • 2. Cruise steadily above 45 mph for 30 seconds.
      • 3. Stop slowly.
      • 4. Turn the ignition off.
      • 5. Repeat the road test 2 times.
  • Retrieve the AWD module CMDTCs.

Is C0092:92 set in continuous memory?
Yes INSTALL a new PTU.
REFER TO: Power Transfer Unit - Vehicles With: Power Transfer Unit Oil Cooler (307-07B Power Transfer Unit - 1.5 L EcoBoost (132 kW/180 L PS) - I3 (Y1), Removal).
REFER TO: Power Transfer Unit - Vehicles Without: Power Transfer Unit Oil Cooler (Power Transfer Unit 307-07B - 1.5 L EcoBoost (132 kW/180 L PS) - I3 (Y1), Removal).
REFER TO: Power Transfer Unit - Vehicles With: Power Transfer Unit Oil Cooler (Power Transfer Unit 307-07C - 2 L EcoBoost (177 kW/240 L PS) - MI4, Removal).
REFER TO: Power Transfer Unit - Vehicles Without: Power Transfer Unit Oil Cooler (Power Transfer Unit 307-07C - 2 L EcoBoost (177 kW/240 L PS) - MI4, Removal).
REFER TO: Power Transfer Unit (307-07D Power Transfer Unit, Removal).
No The system is currently operating correctly.
PINPOINT TEST N: C0095:44, C0096:54

Normal Operation and Fault Symptoms

The RDU contains a drive motor, ball ramp, and multi-plate clutch pack. During manufacturing, the clutch friction characteristics are measured and recorded in a database for each RDU serial number. This data is required by new AWD modules. Programmed to adjust the RDU operating characteristics. The AWD module checks the value stored in memory when the key is turned on. If the value is missing or invalid, a DTC will be stored and AWD functionality will be limited. will be present.

AWD - Active Torque Coupling Configuration subroutine requires the technician to manually enter the 16-character alphanumeric serial number from the label on the RDU into the diagnostic scan tool. The scan tool will search the serial number database and program the AWD module with the clutch characteristic data from production.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
AWD C0095:44 4WD/AWD Rear Differential Actuator 'A': Data Memory Failure When the AWD module was powered up, it detected a problem with the RDU configuration data. The data was incomplete, unreadable, or otherwise corrupted.
AWD C0096:54 4WD/AWD Rear Drive Unit Actuator 'A' Data: Calibration Missing During AWD module power-up, it could not find the RDU configuration data. This data field is empty in the new module.

Possible Sources

  • RDU Configuration Not Programmed
  • AWD Internal Failure
N1 PROGRAM RDU CONFIGURATION CODE IN THE AWD (ALL WHEEL DRIVE) MODULE
  • The ignition is on.
  • Using the diagnostic scan tool, perform the AWD - Active Torque Coupling Configuration procedure.
  • Ignition OFF.
  • The ignition is on.
  • Enter the following diagnostic mode: Clear the AWD module DTCs and repeat the self-test.

Does the DTC return?
Yes INSTALL a new AWD module.
REFER TO: All-Wheel Drive (AWD) Module — 1.5 L EcoBoost (132 kW/180 L PS) — I3 (Y1)/2 L EcoBoost (177 kW/240 L PS) — MI4 (307-07A All-Wheel Drive Systems, Removal and Installation).
REFER TO: All-Wheel Drive (AWD) Module — 2.5 L Duratec — Hybrid (121 kW/164 L PS) (BG) (307-07A All-Wheel Drive Systems, Removal and Installation).
No Repair is complete.
PINPOINT TEST O: U0401:00, U402:00, U0415:00, U0422:00, U0423:00 AND U0428:00

Refer to Wiring Diagrams Cell 14 for schematic and connector information. Refer to Wiring Diagrams Cell 34 for schematic and connector information.

Normal Operation and Fault Symptoms

The AWD module waits to receive network data from other modules over HS-CAN1. The AWD module will set a DTC when it receives invalid or incomplete messages from another module. Incomplete or corrupted messages are usually the result of network traffic preventing the complete message from being received within the calibrated time. Invalid data messages are usually due to a fault in the suspect module or system.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
AWD U0401:00 Incorrect Data Received from ECM/PCM 'A': No Sub Type Information Sets when the AWD module detects invalid data received from the PCM.
AWD U0402:00 Incorrect Data Received from TCM: No Sub Type Information Sets when the AWD module detects invalid data received from the TCM.
AWD U0415:00 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module A: No Sub Type Information Sets when the AWD module detects invalid data received from the ABS "A" control module.
AWD U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information Sets when the AWD module detects invalid data received from the BCM.
AWD U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information Sets when the AWD module detects invalid data received from the IPC.
AWD U0428:00 Invalid Data Received from Steering Wheel Angle Sensor Module: No Subtype Information Sets when the AWD module detects invalid data received from the SCCM.

Possible Sources

  • High Network Traffic Event
  • Intermittent Network Connection
  • Suspect module
O1 CHECK THE SUSPECT MODULE FOR DTCs (DIAGNOSTIC TROUBLE CODES)
  • Enter the following diagnostic mode: Clear and recheck the AWD. CMDTC Self-Test.
  • Enter the following diagnostic mode: Suspect Module On-Demand Self-Test and CMDTC Self-Test.
  • Road test the vehicle.

Is any DTC set in the suspect module?
Yes CHECK and REPAIR all DTCs in the suspect module.
No GO to O2
O2 CHECK THE AWD (ALL WHEEL DRIVE) MODULE GROUND
  • Ignition OFF.
  • Make sure the AWD module mounting nuts are tightened. Torque: 89 lb-in (10 N·m)

Are any fasteners loose?
Yes TIGHTEN the AWD module nuts to specification. RECHECK the system for normal operation.
No GO to O3
O3 CHECK THE HS-CAN1 (HIGH SPEED CONTROLLER AREA NETWORK 1) CONNECTOR

  • Refer to Wiring Diagrams Cell 14 for schematic and connector information.
    DISCONNECT and CHECK the HS-CAN1 connectors between the AWD module and the suspect module.
  • Repair:
    • corrosion (install a new connector or terminals - clean the module pins).
    • damaged or bent pins - install new terminals/pins.
    • pushed-out pins - install new pins as necessary.
  • Reconnect all connectors. Make sure each connector is properly seated and locked.
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article addresses this condition, INSTALL a new suspect module.
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.

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