Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Door window regulator and motor
- Door glass run
- Door window glass
- Loose, corroded connectors
- Circuitry
- Window control switch
- Battery Junction Box (BJB) fuses:
- 26 (40A)
- 93 (5A)
- Body Control Module (BCM) fuses:
- 1 (30A)
- 32 (15A)
- BCM circuit breaker 48 (30A)
- Rear window defrost relay
- Accessory delay relay
- Rear window grid
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
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NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
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NOTE: The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM .
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 mode.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK , The PCM Does Not Respond To The Scan Tool, to diagnose no response from the PCM.
- Carry out the network test:
- If the scan tool responds with no communication from one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
- If the network test passes, retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
- Clear the continuous DTCs and carry out the self-test diagnostics for the BCM and HVAC module.
- If the DTCs retrieved are related to the concern, go to the BODY CONTROL MODULE (BCM) 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 .