Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical and electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Switch(es)
- Seat tracks obstructed or damaged
- Lumbar assembly damaged
- Recliner assembly damaged (backrest frame)
- Thermo-Electric Device (TED) assembly filter dirty (cushion or backrest)
- Battery Junction Box (BJB) fuse(s):
- 5 (30A) (passenger power seat)
- 22 (30A) (front climate controlled or heated seats)
- 32 (30A) (driver power seat or driver memory seat)
- Smart Junction Box (SJB) fuse(s):
- 3 (15A) (driver memory seat)
- 14 (10A) (driver memory seat)
- 18 (20A) (rear heated seats)
- 35 (10A) (front and rear heated seats)
- 35 (10A) (driver and front passenger power lumbar with massage)
- Wiring harness
- Loose or corroded connections
- Seat control switch(es)
- Power seat motor (seat track)
- Memory SET switch
- Seat cushion heater
- Seat backrest heater
- Lumbar control switch
- Power lumbar motor
- Power lumbar control module
- TED assembly (cushion or backrest)
- Power recliner motor
- Driver Door Module (DDM)
- Driver Seat Module (DSM)
- Dual Climate Controlled Seat Module (DCSM)
- Front Controls Interface Module (FCIM)
- Heated seat module
- HVAC module
NOTE: The Smart Junction Box (SJB) may also be identified as the Generic Electronic Module (GEM). - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the concern is with the power seat (non-memory seat) or heated seat and the cause is not visually evident, verify the symptom and GO to SYMPTOM CHART .
- If the concern is with the memory seat or climate controlled seat and the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
- If the scan tool does not communicate with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to MODULE COMMUNICATIONS NETWORK , No Power To The Scan Tool, to diagnose no power to the scan tool.
- If the scan tool does not communicate with the vehicle:
- verify the ignition is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK to diagnose no response from the PCM.
- Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
- If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).
- Clear the continuous DTCs and carry out the self-test diagnostics for the Driver Seat Module (DSM), Driver Door Module (DDM), DCSM, FCIM and HVAC module.
- If the DTCs retrieved are related to the concern, go to Driver Door Module (DDM) DTC Chart , Driver Seat Module (DSM) DTC Chart , Dual Climate Controlled Seat Module (DCSM) DTC Chart or HVAC Module DTC Chart . For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.