Initial Inspection and Diagnostic Overview
Inspection and Verification1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical and electrical damage.
NOTE:
- For multifunction switch concerns, see one of the following sections:
- For exterior lighting, see TROUBLESHOOTING (LIGHTING SYSTEMS).
- For wipers and washers, see WIPERS AND WASHERS.
3. If binding occurs, turn the steering wheel left or right to release any pressure on the ignition switch and make sure the ignition key is cut correctly.
4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5. If the cause is not visually evident, connect the WDS or equivalent Tester to the data link connector and select the vehicle to be tested from the WDS or equivalent Tester menu. If 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.
6. If the WDS or equivalent Tester still does not communicate with the vehicle, see the WDS or equivalent Tester operating manual.
7. Carry out the data link diagnostic test. If the WDS or equivalent Tester responds with:
- ISO or CAN circuit fault; all electronic control units no response/not equipped, see COMMUNICATIONS NETWORK.
- No response/not equipped for the smart junction box (SJB), see PINPOINT TEST 1: THE POWERTRAIN CONTROL MODULE (PCM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL. Pinpoint Test 1
- 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.
8. If the DTCs retrieved are related to the concern, see the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Descriptions
9. If no DTCs related to the concern are retrieved, see the Symptom Chart to continue diagnostics. Symptom Chart