B231A-11

B231A-11-REAR WIPER MOTOR CONTROL - CIRCUIT SHORT TO GROUND





For a complete wiring diagram, refer to the wiring information.

Theory of Operation

The Body Control Module (BCM) receives the rear wiper request as network message on the communications network. The BCM energizes the coil on the Rear Wiper Relay, which is grounded through the Power Distribution Center ground.

- When Monitored:
With the rear wipers on.

- Set Condition:
The Body Control Module (BCM) detects a short to ground in the rear wiper relay control circuit.





1. CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, clear DTCs.
3. Turn the rear wipers on.
4. With the scan tool, read the active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (W12) REAR WIPER RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Power Distribution Center C3 harness connector.
3. Disconnect the BCM E harness connector.
4. Measure the resistance between ground and the (W12) Rear Wiper Relay Control circuit.

Is the resistance above 10k Ohms?

Yes

- Go To 3

No

- Repair the short to ground in the (W12) Rear Wiper Relay Control circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE BCM FOR CORRECT OPERATION
1. Reconnect the BCM E harness connector.
2. Turn the ignition on.
3. Turn the rear wipers on.
4. Using a 12-volt test light connected to ground, check the (W12) Rear Wiper Relay Control circuit at the Power Distribution Center C3 harness connector.

Does the test light illuminate?

Yes

- Replace the Power Distribution Center. For additional information, Power Distribution Center (PDC) - Description.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Body Control Module (BCM). Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.