B230D

B230D-REAR WIPER PARK SWITCH INPUT CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
When the Front Control Module (FCM) detects a short/low condition on the rear wiper park switch control circuit.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all Front Control Module (FCM) DTCs.
3. Turn the Rear Wipers on.
4. With the scan tool, read the Rear Wiper DTCs.

Does the scan tool read: B230D-REAR WIPER PARK SWITCH INPUT CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. WIPER/WASHER SWITCH
1. Turn the ignition off.
2. Disconnect the Rear Wiper/Washer Switch connector.
3. Measure the internal resistance of the Wiper/Washer Switch between cavity 1 and 2 of the switch.

Is the resistance above 5.0 Ohms?

Yes

- Replace the Rear Wiper/Washer Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. FRONT CONTROL MODULE (FCM)




1. Disconnect the FCM C1 harness connector.
2. Measure the resistance between ground and the (W17) Rear Wiper Park Switch Sense circuit in the Rear Wiper/Washer Switch harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Repair the short to ground in the (W17) Rear Wiper Park Switch Sense circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Front Control Module (FCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.