Vehicle Dynamic Suspension. Diagnosis and Testing

• CHECK the service history for recent service actions related to the VDM. This DTC is set due to incomplete or incorrect PMI procedures.
• If recent service actions were performed on the VDM, REPEAT the PMI procedure as directed by the diagnostic scan tool.
• CLEAR the DTC and PERFORM the VDM self-test. If the DTC does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CHECK the service history for recent service actions related to the VDM. This DTC is set due to incomplete or incorrect PMI procedures.
• If recent service actions were performed on the VDM, REPEAT the PMI procedure as directed by the diagnostic scan tool.
• CLEAR the DTC and PERFORM the VDM self-test. If the DTC does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CHECK the service history for recent service actions related to the VDM. This DTC is set due to incomplete or incorrect PMI procedures.
• If recent service actions were performed on the VDM, REPEAT the PMI procedure as directed by the diagnostic scan tool.
• CLEAR the DTC and PERFORM the VDM self-test. If the DTC does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CHECK the service history for recent service actions related to the VDM. This DTC is set due to incomplete or incorrect PMI procedures.
• If recent service actions were performed on the VDM, REPEAT the PMI procedure as directed by the diagnostic scan tool.
• CLEAR the DTC and PERFORM the VDM self-test. If the DTC does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• This DTC is stored in permanent memory if any of the following PCM messages contain "invalid" instead of actual message data: accelerator pedal position, ambient air temperature, drive wheel torque, engine speed data, powertrain status, gear selector position or vehicle speed.
• Using the diagnostic scan tool, RETRIEVE and CHECK all PCM and GWM diagnostic trouble codes (DTCs).
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
  REFER TO: Engine Control Modules (303-14B Engine Control Modules - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing).
  REFER TO: Engine Control Modules (303-14B Engine Control Modules - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing).
  REFER TO: Engine Control Modules (303-14B Engine Control Modules - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing).
• If the diagnostic scan tool cannot communicate with the PCM or GWM,
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
• If there are no diagnostic trouble codes (DTCs) in the PCM or GWM, the condition may be intermittent.
• TURN the ignition OFF. DISCONNECT and INSPECT all PCM and GWM electrical connectors and related inline connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.

• This DTC is stored in permanent memory if any of the following ABS module messages contain "invalid" instead of actual message data: ABS active, brake torque request, stability control mode, stability control request indicator, traction control mode, vehicle lateral acceleration, vehicle longitudinal acceleration, vehicle roll rate or vehicle vertical acceleration.
• Using the diagnostic scan tool, RETRIEVE and CHECK all ABS module diagnostic trouble codes (DTCs).
  REFER TO: Anti-Lock Brake System (ABS) and Stability Control System (206-09 Anti-Lock Brake System (ABS) and Stability Control System, Diagnosis and Testing).
• If the diagnostic scan tool cannot communicate with the ABS module,
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
• If there are no diagnostic trouble codes (DTCs) in the ABS module, the condition may be intermittent.
• TURN the ignition OFF. DISCONNECT and INSPECT all ABS module electrical connectors and related inline connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.

• Steering wheel angle information is sent to the VDM from the PSCM.
• This DTC is stored in permanent memory if the steering wheel angle data message contains "invalid" instead of actual steering wheel angle data.
• Using the diagnostic scan tool, RETRIEVE and CHECK all PSCM diagnostic trouble codes (DTCs).
  Click here to access the guided routine (EPAS). Internet Explorer version 11 or later is required to perform this Pinpoint test.
• If the diagnostic scan tool cannot communicate with the PSCM,
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
• If there are no diagnostic trouble codes (DTCs) in the PSCM, the condition may be intermittent.
• TURN the ignition OFF. DISCONNECT and INSPECT all PSCM module electrical connectors and related inline connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.

• This DTC is stored in permanent memory if any of the following BCM messages contain "invalid" instead of actual message data.
• Using the diagnostic scan tool, RETRIEVE and CHECK all BCM diagnostic trouble codes (DTCs).
  REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
• If the diagnostic scan tool cannot communicate with the BCM,
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
• If the BCM has no diagnostic trouble codes (DTCs), this condition may be caused by an intermittent concern.
• TURN the ignition OFF and WAIT one minute. DISCONNECT and INSPECT all BCM electrical connectors and related inline connectors for corrosion, bent pins, backed-out pins and spread terminals. REPAIR as necessary.

• This DTC is stored in continuous memory if any of the following RCM messages contain 'invalid' instead of the actual message data: vehicle lateral acceleration, vehicle longitudinal acceleration or vehicle roll rate.
• Using a diagnostic scan tool, RETRIEVE and INSPECT all RCM diagnostic trouble codes (DTCs).
  REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
• If the diagnostic scan tool cannot communicate with the RCM,
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
• If there are no diagnostic trouble codes (DTCs) in the RCM, this condition may be caused by an intermittent concern.
• TURN the ignition OFF and WAIT one minute. DISCONNECT and INSPECT all RCM electrical connectors and related inline connectors for corrosion, bent pins, backed-out pins and spread terminals. REPAIR as necessary.

• CLEAR the diagnostic trouble code. PERFORM the VDM self-test.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• This DTC is set due to an incomplete or incorrect flash programming procedure.
• REPEAT the flash programming procedure as directed by the diagnostic scan tool.
• CLEAR the DTC and PERFORM the VDM self-test. RETRIEVE and RECORD all diagnostic trouble codes (DTCs).
• If the diagnostic trouble code does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• This DTC is preset in a new VDM and is automatically cleared when the VDM is configured correctly.
• CONNECT the diagnostic scan tool and PERFORM the PMI procedure as directed by the diagnostic scan tool.
• CLEAR the diagnostic trouble code. PERFORM the VDM self-test. RETRIEVE and RECORD all diagnostic trouble codes (DTCs).
• If the diagnostic trouble code does not return, the repair is complete.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CLEAR the diagnostic trouble code. PERFORM the VDM self-test.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CLEAR the diagnostic trouble code. PERFORM the VDM self-test.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• CLEAR the diagnostic trouble code. PERFORM the VDM self-test.
• If the DTC returns, INSTALL a new VDM.
  REFER TO: Vehicle Dynamics Module (VDM) (204-05 Suspension Ride Control, Removal and Installation).

• Fuse
• Wiring, Terminals or Connectors
• VDM concern

• 
  REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

• Diagnostic trouble codes (DTCs) present in the VDM

• RETRIEVE all VDM diagnostic trouble codes (DTCs).

• Dynamic vehicle suspension system disabled

• RETRIEVE all VDM diagnostic trouble codes (DTCs).
• If there are no diagnostic trouble codes (DTCs),
  REFER TO: Suspension System (204-00 Suspension System, General Information, Diagnosis and Testing).

Normal Operation and Fault Symptoms

The VDM requires an operating voltage of 9 to 16 volts. The VDM receives this voltage from the BCM. The VDM has one ground circuit. Excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system causes the VDM to set a diagnostic trouble code.

DTC Fault Trigger Conditions

Possible Sources

• Fuses
• Wiring, Terminals or Connectors
• VDM

Visual Inspection and Pre-checks

• Make sure that the battery terminals and vehicle cables are free of corrosion and other contamination.
• Make sure that the vehicle battery terminals are tightened to the correct torque.
• Check that BCM fuse 36 (15A) is in working condition.

• Using the diagnostic scan tool, clear the VDM diagnostic trouble codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Using the diagnostic scan tool, retrieve all Continuous Monitor Diagnostic Trouble Codes (CMDTCs).

• Perform the battery state of health test.
  REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

• The ignition is on.

• Measure and record the battery voltage.

• Using the diagnostic scan tool, monitor the SW_IGN_V_VDM PID.

• Ignition OFF.

• Disconnect VDM C3672A.

• The ignition is on.

• Action:
  Click to display the connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-1		Ground

  
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-2		Ground

• Ignition OFF.

• Disconnect VDM C3672A.

• Action:
  Click to display the connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-11		Ground

  
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-12		Ground

• Ignition OFF.

• Disconnect BCM C2280F.

• Using a good light source, inspect all disconnected electrical connectors for the following:
  • corrosion - install a new connector or terminal and clean the module contacts
  • damaged or bent pins - install new terminals or pins
  • pushed-out pins - install new pins as necessary
  • spread terminals - install new terminals as necessary

• Connect BCM C2280F. Make sure it is installed and fully seated.

• Connect VDM C3672A and C3672B. Make sure they are installed and fully seated.

• Operate the system and determine if the concern is still present.

Normal Operation and Fault Symptoms

The VDM requires an operating voltage of 9 to 16 volts. The VDM receives this voltage from the BCM. The VDM has one ground circuit. Excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system causes the VDM to set a diagnostic trouble code.

A charging system overcharge condition causes the VDM to set a diagnostic trouble code. This DTC can also be set in the VDM due to battery charging or jump-starting the vehicle.

DTC Fault Trigger Conditions

Possible Sources

• Charging System Concern
• VDM

• Using the diagnostic scan tool, retrieve all Continuous Monitor Diagnostic Trouble Codes (CMDTCs).

• Turn off all interior lights, exterior lights and accessories.

• NOTE: Do not allow engine speed to exceed 2000 RPM during this step, otherwise the generator may self-excite, causing the charging system output voltage to default. If engine speed exceeds 2000 RPM, turn the engine off and restart it before performing this step. Start the engine and run it at approximately 1500 RPM for 3 minutes while monitoring the battery voltage.

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, clear the VDM diagnostic trouble codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Ignition OFF.

• Disconnect the VDM C3672A and C3672B.

• Disconnect BCM C2280F.

• Using a good light source, inspect all disconnected electrical connectors for the following:
  • corrosion - install a new connector or terminal and clean the module contacts
  • damaged or bent pins - install new terminals or pins
  • pushed-out pins - install new pins as necessary
  • spread terminals - install new terminals as necessary

• Connect BCM C2280F. Make sure it is installed and fully seated.

• Connect VDM C3672A and C3672B. Make sure they are installed and fully seated.

• Operate the system and determine if the concern is still present.

Normal Operation and Fault Symptoms

Using the input data from the height sensors and HS-CAN2 messages, the VDM supplies variable current to the damper solenoids. The VDM is programmed with an upper limit for this current. One or more of the height sensors may internally fail, and damage or modification to the vehicle suspension may also cause this DTC to set.

DTC Fault Trigger Conditions

Possible Sources

• Height sensors installed incorrectly
• Height sensor(s) faulty
• VDM calibration

• Using the diagnostic scan tool, perform the VDM module self-test.

• Place the transmission in NEUTRAL, raise and support the vehicle.
  REFER TO: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

• Inspect all 4 height sensors, make sure they are undamaged and installed correctly.
  REFER TO: Front Suspension Height Sensor (204-05 Vehicle Dynamic Suspension, Removal and Installation).
  REFER TO: Rear Suspension Height Sensor (204-05 Vehicle Dynamic Suspension, Removal and Installation).

• Using the diagnostic scan tool, perform the Ride Height Calibration procedure with no passengers or cargo in the vehicle.

• Road test the vehicle at a speed above 8 km/h on a smooth surface for at least 3 minutes and use the diagnostic scan tool to record the following parameter identifications (PIDs):
  • Left front damper current (LF_DAMP_CUR)
  • Right front damper current (RF_DAMP_CUR)
  • Left rear damper current (LR_DAMP_CUR)
  • Right rear damper current (RR_DAMP_CUR)

• Using the diagnostic scan tool, read the following parameter identifications (PIDs):
  • Left front height sensor voltage (LF_Hght_Sens)
  • Right front height sensor voltage (RF_Hght_Sens)
  • Left rear height sensor voltage (LR_Hght_Sens)
  • Right rear height sensor voltage (RR_Hght_Sens)

Normal Operation and Fault Symptoms

The VDM supplies variable voltage to the damper solenoids based on the sensor input and HS-CAN messages. The VDM continuously monitors the damper solenoid circuits and sets a DTC when a circuit fault is detected. A shorted or open damper solenoid also causes the VDM to set a DTC.

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Damper or strut (solenoid valve is serviced as an assembly with the damper or strut)
• VDM

Visual Inspection and Pre-checks

• Make sure the damper solenoid wiring harness is routed correctly and is not damaged.
• Make sure there is no corrosion or other contamination on the damper solenoid electrical connector.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Ignition OFF.

• Disconnect VDM C3672A.

• Disconnect the VDM C3672B.

• Disconnect the electrical connector from the suspect damper solenoid valve.

• For the left front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-7		Ground
  C3672A-8		Ground

• For the right front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-9		Ground
  C3672A-10		Ground

• For the left rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-3		Ground
  C3672B-4		Ground

• For the right rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-1		Ground
  C3672B-2		Ground

• Ignition OFF.

• Disconnect VDM C3672A.

• Disconnect the VDM C3672B.

• Disconnect the electrical connector from the suspect damper solenoid valve.

• The ignition is on.

• For the left front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-7		Ground
  C3672A-8		Ground

• For the right front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-9		Ground
  C3672A-10		Ground

• For the left rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-3		Ground
  C3672B-4		Ground

• For the right rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-1		Ground
  C3672B-2		Ground

• Ignition OFF.

• Disconnect VDM C3672A.

• Disconnect the VDM C3672B.

• Disconnect the electrical connector from the suspect damper solenoid valve.

• For the left front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-8		C1668-2
  C3672A-7		C1668-1

• For the right front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672A-9		C1699-1
  C3672A-10		C1699-2

• For the left rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-3		C3655-1
  C3672B-4		C3655-2

• For the right rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3672B-2		C3656-2
  C3672B-1		C3656-1

• Ignition OFF.

• For the left front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1668-1		C1668-2

• For the right front damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1699-1		C1699-2

• For the left rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3655-1		C3655-2

• For the right rear damper solenoid, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3656-1		C3656-2

• Ignition OFF.

• For the left front damper solenoid, measure the component side resistance:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1668-1 component side		C1668-2 component side

• For the right front damper solenoid, measure the component side resistance:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1699-1 component side		C1699-2 component side

• For the left rear damper solenoid, measure the component side resistance:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3655-1 component side		C3655-2 component side

• For the right rear damper solenoid, measure the component side resistance:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C3656-1 component side		C3656-2 component side

• Ignition OFF.

• Disconnect the VDM C3672A and C3672B (if not previously disconnected).

• Disconnect the electrical connector from the suspect damper solenoid valve (if not previously disconnected).

• Using a good light source, inspect all disconnected electrical connectors for the following:
  • corrosion - install a new connector or terminal and clean the module contacts
  • damaged or bent pins - install new terminals or pins
  • pushed-out pins - install new pins as necessary
  • spread terminals - install new terminals as necessary

• Connect the electrical connector to the suspect damper solenoid valve. Make sure that it is correctly installed and latched.

• Connect VDM C3672A and C3672B. Make sure they are installed and fully seated.

• Operate the system and determine if the concern is still present.

Normal Operation and Fault Symptoms

REFER TO: Vehicle Dynamic Suspension Overview (204-05 Vehicle Dynamic Suspension, Description and Operation).
The VDM continuously monitors the ride height sensor circuits and sets a DTC when a circuit fault is detected. A ride height sensor short to ground also causes the VDM to set a DTC.

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Height sensor
• VDM

Visual Inspection and Pre-checks

• Make sure that the ride height sensor harness is routed correctly and is not damaged.
• Make sure that the ride height sensor electrical connector is free of corrosion and other contamination.

• The ignition is on.

• NOTE: If both types of faults (XXXXX:11 and XXXXX:12) are present, diagnose the XXXXX:12 fault first. Using the diagnostic scan tool, perform the VDM self-test.

• Ignition OFF.

• Disconnect VDM C3672A.

• Disconnect the VDM C3672B.

• Disconnect the electrical connectors from the suspect ride height sensors ( both front sensors or both rear sensors).

• The ignition is on.

• For the left front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1153-1		Ground
  C1153-2		Ground
  C1153-3		Ground

• For the right front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1151-1		Ground
  C1151-2		Ground
  C1151-3		Ground

• For the left rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4092-1		Ground
  C4092-2		Ground
  C4092-3		Ground

• For the right rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4093-1		Ground
  C4093-2		Ground
  C4093-3		Ground

• Ignition OFF.

• Disconnect VDM C3672A (if not previously disconnected).

• Disconnect VDM C3672B (if not previously disconnected).

• Disconnect the electrical connector from the suspect height sensor (if not previously disconnected).

• For the left front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1153-1		Ground
  C1153-2		Ground
  C1153-3		Ground

• For the right front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1151-1		Ground
  C1151-2		Ground
  C1151-3		Ground

• For the left rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4092-1		Ground
  C4092-2		Ground
  C4092-3		Ground

• For the right rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4093-1		Ground
  C4093-2		Ground
  C4093-3		Ground

• For the left front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1153-1		C3672A-4
  C1153-2		C3672A-14
  C1153-3		C3672A-15

• For the right front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1151-1		C3672A-16
  C1151-2		C3672A-5
  C1151-3		C3672A-6

• For the left rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4092-1		C3672B-16
  C4092-2		C3672B-5
  C4092-3		C3672B-6

• For the right rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4093-1		C3672B-8
  C4093-2		C3672B-17
  C4093-3		C3672B-7

• Ignition OFF.

• For the left front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1153-1		C1153-2
  C1153-1		C1153-3
  C1153-2		C1153-3

• For the right front ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C1151-1		C1151-2
  C1151-1		C1151-3
  C1151-2		C1151-3

• For the left rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4092-1		C4092-2
  C4092-1		C4092-3
  C4092-2		C4092-3

• For the right rear ride height sensor, measure:
  Click to display connectors
  

  Positive lead	Measurement/Action	Negative lead
  C4093-1		C4093-2
  C4093-1		C4093-3
  C4093-2		C4093-3

Normal Operation and Fault Symptoms

With the ignition on, the PCM sends messages to the GWM over the HS-CAN1 bus. The GWM sends these messages to the VDM over HS-CAN2. If the VDM does not receive these messages for a set period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent by the PCM to the VDM, refer to the Network Message Chart. REFER TO: Vehicle Dynamic Suspension Overview (204-05 Vehicle Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• GWM
• PCM

• Ignition OFF.

• Using a scan tool, perform the network test.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Record the VDM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the VDM self-test.

• Using the diagnostic scan tool, perform the GWM self-test.

• Using the diagnostic scan tool, perform the PCM KOEO self-test.

• Check the vehicle service history for recent service actions related to the PCM or VDM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.

Yes

CHECK OASIS for any applicable service articles: TSBs, GSBs, SSMs or FSAs. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSBs) exist for this concern, Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

Normal Operation and Fault Symptoms

With the ignition on, the ABS module sends messages to the VDM over the HS-CAN2 bus. If the VDM does not receive these messages for a set period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent by the ABS module to the VDM, refer to the Network Message Chart. REFER TO: Vehicle Dynamic Suspension Overview (204-05 Vehicle Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• ABS Module

• The ignition is on.

• Using a scan tool, perform the network test.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Record the VDM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the VDM self-test.

• Using the diagnostic scan tool, perform a self-test of the ABS module.

• Check the vehicle service history for recent service actions related to the ABS module or VDM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.

Normal Operation and Fault Symptoms

With the ignition on, the EPAS system sends messages to the GWM over the HS-CAN2 bus. The GWM sends these messages to the VDM over HS-CAN2. If the VDM does not receive these messages for a set period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent by the EPAS system to the VDM, refer to the Network Message Chart. REFER TO: Dynamic Suspension Overview (204-05 Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• GWM
• EPAS

• The ignition is on.

• Using a scan tool, perform the network test.

• Using the diagnostic scan tool, perform the PSCM self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the PSCM self-test.

• Record the PSCM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the PSCM self-test.

• Using the diagnostic scan tool, perform the PSCM self-test.

Yes	CHECK the PSCM module diagnostic trouble codes (DTCs). Click here to access the guided routine (EPAS). Internet Explorer version 11 or later is required to perform this Pinpoint test.

• Review the vehicle service history for recent service actions related to the PSCM or VDM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSB) exist for this concern, INSTALL a new EPAS module. Click here to access the guided routine (EPAS). Internet Explorer version 11 or later is required to perform this Pinpoint test.

Normal Operation and Fault Symptoms

With the ignition on, the TBM sends messages to the VDM over the HS-CAN2 bus. If the VDM does not receive these messages for a set period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent by the TBM to the VDM, refer to the Network Message Chart. REFER TO: Dynamic Suspension Overview (204-05 Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• RCM

• The ignition is on.

• Using a scan tool, perform the network test.

• Using the diagnostic scanner, perform the TBM self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scanner, perform the TBM self-test.

• Record the TBM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the TBM self-test.

• Using the diagnostic scanner, perform the TBM self-test.

• Review the vehicle service history for recent service actions related to the TBM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.

Normal Operation and Fault Symptoms

With the ignition on, the BCM sends messages to the GWM over the HS-CAN1 bus. The GWM sends these messages to the VDM over HS-CAN2. If the VDM does not receive these messages for a set period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent by the BCM to the VDM, refer to the Network Message Chart. REFER TO: Dynamic Suspension Overview (204-05 Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• GWM
• BCM

• The ignition is on.

• Using a scan tool, perform the network test.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• Ignition OFF.

• The ignition is on.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Record the VDM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the VDM self-test.

• Using the diagnostic scan tool, perform the GWM self-test.

• Using a scan tool, perform the BCM self-test.

• Check the vehicle service history for recent service actions involving the BCM or VDM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.

Yes

CHECK in OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no technical service bulletins (TSB) exist for this concern, INSTALL a new BCM module. Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

Normal Operation and Fault Symptoms

With the ignition on, the RCM sends messages to the VDM over the HS-CAN2 bus. If the VDM does not receive these messages within a specified period of time, the module sets diagnostic trouble codes (DTCs). For information on the messages sent to the VDM by the RCM, refer to the network message chart. REFER TO: Vehicle Dynamic Suspension Overview (204-05 Vehicle Dynamic Suspension, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, Terminals or Connectors
• Network communication fault
• Vehicle battery
• Charging System Concern
• RCM

• The ignition is on.

• Using a scan tool, perform the network test.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Clear the Diagnostic Trouble Codes (DTCs).

• The ignition is on.

• Ignition OFF.

• Using the diagnostic scan tool, perform the VDM module self-test.

• Record the VDM diagnostic trouble codes (DTCs).

• Review the recorded diagnostic trouble codes (DTCs) from the VDM self-test.

• Using the diagnostic scanner, perform the RCM self-test.

• Check the vehicle service history for recent service actions involving the RCM or VDM. If recent service history is found:
  • make sure the correct replacement module was installed.
    • HVBOM can be used to verify the correct part installation.
  • make sure the replacement module configuration was correct.
    • reconfigure the module using the original data if the previous configuration is suspect.
  • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle.
    • return the replaced module to the original vehicle and obtain a new replacement module.

• Operate the system and determine whether the observed symptom persists.

• Using the diagnostic scan tool, perform a self-test of all modules.