Pinpoint Test I: The Wipers Will Not PARK At the Correct Position - Rear Window

Wipers and Washers

Pinpoint Test I: The Wipers Will Not PARK at the Correct Position - Rear Window

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

Normal Operation

Integral to the wiper motor is a set of contacts that only close when the wipers are in a NON-PARK position. The Body Control Module (BCM) supplies power to the wiper motor as long as the contacts are closed or the wipers are in a NON-PARK position. When the wipers are commanded OFF during use, the BCM (Body Control Module) continues to supply the wiper motor with power until the contacts open when the PARK position is reached.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Rear window wiper motor

- BCM (Body Control Module)

PINPOINT TEST I : THE WIPERS WILL NOT PARK AT THE CORRECT POSITION - REAR WINDOW

I1 CHECK FOR BCM (Body Control Module) DTCs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self-Test- BCM (Body Control Module).

Are any BCM (Body Control Module) DTCs present?

Yes
REFER to the Body Control Module (BCM) DTC Chart for further diagnosis Wiper and Washer Systems.

No
GO to I2.

I2 CHECK OPERATION OF THE WINDSHIELD WIPERS

- Operate the windshield wipers in LOW, HIGH and in each INTERMITTENT mode.

Do the windshield wipers operate correctly?

Yes
GO to I3.

No
IDENTIFY the windshield wiper system symptom and GO to Symptom Chart for further diagnosis Symptom Related Diagnostic Procedures.

I3 CHECK OPERATION OF THE REAR WINDOW WIPER

- Operate the windshield wipers in HIGH and turn the rear window wiper ON.

Does the rear window wiper operate continuously and correctly?

Yes
GO to I4.

No
GO to Pinpoint Test F Pinpoint Test F: The CONTINUOUS Or INTERMITTENT Wiper Speeds Do Not Operate Correctly - Rear Window.

I4 CHECK FOR CORRECT WIPER MOTOR OPERATION

- Ignition OFF.

- Inspect the rear window wiper motor C4218 for the following conditions:
- corrosion

- damaged or pushed out pins


- Connect the rear window wiper motor C4218 and make sure it seats correctly.

- Connect: Rear Window Wiper Motor C4218.

- Operate the system and verify if the concern is still present.

Is the concern still present?

Yes
INSTALL a new rear window wiper motor. REFER to Wiper Motor - Rear Window Wiper Motor - Rear Window. TEST the system for normal operation.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.