B231B

B231B-REAR WIPER MOTOR CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Diagrams/Electrical.





1.(A1) FUSED B+ CIRCUIT OPEN

NOTE: Check all fuses and circuit breakers before proceeding with the diagnosis of this DTC.

Turn the ignition on.

Remove the Rear Wiper relay.

Measure the voltage at cavity 86 of the Rear Wiper relay.

Is the voltage above 10.0 volts?

Yes

- Go To 2

No

- Check the (A1) Fused B+ circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test


2.REAR WIPER RELAY





Turn the ignition off.

Replace the Rear Wiper relay with and known good relay.

Turn the ignition on.

With the Scan Tool, clear all FCM DTC's.

Turn the Rear Wipers ON then OFF.

With the Scan Tool, read the FCM DTC's.

Does the Scan Tool read: B231B-REAR WIPER MOTOR CONTROL CIRCUIT LOW?

Yes

- Go To 3

No

- Replace the Rear Wiper relay.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test


3.(W12) REAR WIPER RELAY CONTROL CIRCUIT SHORT TO GROUND

Measure the resistance between ground and the (W12) Rear Wiper Relay Control circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (W12) Rear Wiper Relay Control circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go to 4

4.INTEGRATED POWER MODULE





Turn the ignition off.

Disconnect the FCM from the IPM.

Turn the ignition on.

Measure the voltage on cavity 28 (Rear Wiper Relay Control) of the IPM.

Is the voltage above 10.0 volts?

Yes

- Replace the FCM.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test


No

- Replace the IPM.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test