Diagnostic Routine D

Diagnostic Routine D

Diagnostic Overview

The Wiper Stays On Continuously - Rear Window

Refer to Wiring Diagram Set 81 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Rear Wiper Operation .

Pinpoint Test

1. CHECK THE REAR WIPER OFF SWITCH (R_WIPE_OFF_SW) PID (Parameter Identification)

1. Ignition ON.

2. Using a scan tool, view SCCM (Steering Column Control Module) PID (Parameter Identification) R_WIPE_OFF_SW.

3. Make sure the wiper/washer switch is in the OFF position.

Is the PID (Parameter Identification) R_WIPE_OFF_SW status ON (indicating the wiper/washer switch is in the OFF position)?








2. CHECK THE REAR WINDOW WIPER OPERATION WITH THE WINDSHIELD WIPER MOTOR DISCONNECTED

1. Ignition OFF.

2. Disconnect: Windshield Wiper Motor.

3. Ignition ON.

4. Verify the rear window wiper operation.

Is the rear window wiper still operating?








3. CHECK THE REAR WINDOW WIPER COMMAND CIRCUIT FOR A SHORT TO GROUND

1. Ignition OFF.

2. Disconnect: Rear Window Wiper Motor.

3. Measure:





Is the resistance greater than 10,000 ohms?








4. CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION

1. Ignition OFF.

2. Inspect the windshield wiper motor connector.

3. Repair:

- corrosion (replace connector or terminals- clean module pins)
- damaged or bent pins- replace terminals/pins
- pushed-out pins- replace pins as necessary

4. Reconnect the windshield wiper motor connector. Make sure it seats and latches correctly.

5. Operate the system and verify the concern is still present.

Is the concern still present?








5. CHECK FOR CORRECT REAR WINDOW WIPER MOTOR OPERATION

1. Inspect the rear window wiper motor connector.

2. Repair:

- corrosion (replace connector or terminals- clean module pins)
- damaged or bent pins- replace terminals/pins
- pushed-out pins- replace pins as necessary

3. Reconnect the rear window wiper motor connector. Make sure it seats and latches correctly.

4. Connect: Windshield Wiper Motor

5. Operate the system and verify the concern is still present.

Is the concern still present?