Inspection and Verification

Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart

VISUAL INSPECTION CHART

Mechanical	Electrical
Window glass Window motor Window regulator	Fuse(s) Circuitry open/shorted Loose or corroded connector(s) Window control switches Relays Smart junction box (SJB)

If an obvious cause for an observed or reported concern is found, correct the cause if possible before proceeding to the next step.
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 (DCL).
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.
- See COMMUNICATIONS NETWORK , , No power to the scan tool, to diagnose no communication with the scan tool.
If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- See COMMUNICATIONS NETWORK , , No power to the scan tool, to diagnose no communication with the scan tool.
Carry out the network test.
- If the scan tool responds with no communication from one or more modules, see COMMUNICATIONS NETWORK , .
- If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).
Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
If the DTCs retrieved are related to the concern, See GLASS, FRAMES AND MECHANISMS DIAGNOSTIC TROUBLE CODE (DTC) INDEX , .
If no DTCs related to the concern are retrieved, See SYMPTOM TROUBLESHOOTING CHART - POWER WINDOWS , .