Initial Inspection and Diagnostic Overview

WIPERS AND WASHERS

Inspection and Verification

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart





3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.


NOTE: The windshield wiper motor does not communicate on the network. The windshield wiper motor provides wiper on/off status directly to the smart junction box (SJB).

4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).


NOTE: Make sure to use the latest scan tool software release.

5. 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 Pinpoint Test 17: No Power To The Scan Tool, to diagnose no power to the scan tool.


NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the data link connector (DLC) are provided to the VCM.

6. 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 Pinpoint Test 10: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool, to diagnose no response from the SJB.

7. Carry out the network test.

- If the scan tool responds with no communication from one or more modules, see - Communications Network - Troubleshooting.
- If the network test passes, retrieve and record the continuous memory DTCs.

8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.

9. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) DTC Chart. Wipers and Washers - DTC Chart For all other DTCs, see - Diagnostic Trouble Code (DTC) Chart - B, C, P And U Codes.

10. If no DTCs related to the concern are retrieved, see - Symptom Related Diagnostic Procedures.