Initial Inspection and Diagnostic Overview

Inspection and Verification

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage. See the chart.
3. If an obvious cause for an observed of reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the WDS or equivalent Tester to the data link connector (DLC) and select the vehicle to be tested from the WDS or equivalent Tester menu. If the WDS or equivalent Tester does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

5. If the WDS or equivalent Tester still does not communicate with the vehicle, see the WDS or equivalent Tester operating manual.
6. Carry out the WDS or equivalent Tester data link test. If the WDS or equivalent Tester responds with:
- CAN circuit fault; all electronic control units with no response/not equipped, see COMMUNICATIONS NETWORK.
- No response/not equipped for SJB, see COMMUNICATIONS NETWORK.
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the SJB.

7. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index to continue diagnostics. Diagnostic Trouble Code Descriptions
8. If no DTCs related to the concern are retrieved, GO to SYMPTOM TROUBLESHOOTING CHART - POWER WINDOWS to continue diagnostics. Symptom Chart