Pinpoint Test C: The Wipers Stay ON Continuously - Windshield

Wipers and Washers

Pinpoint Test C: The Wipers Stay ON Continuously - Windshield

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

Normal Operation

The Body Control Module (BCM) supplies a signal voltage(s) to the wiper/washer switch for the HIGH speed, LOW speed, and INTERMITTENT functions. Each function has its own dedicated signal (sense) line. The wiper/washer switch physically grounds the signal voltage(s) when a function is selected. The BCM (Body Control Module) then reacts to the grounded signal voltage(s) and its integral electronics make a decision on which wiper system function to carry out.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Wiper/washer switch

- Windshield wiper motor

- BCM (Body Control Module)

PINPOINT TEST C : THE WIPERS STAY ON CONTINUOUSLY - WINDSHIELD

C1 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 C2.

C2 CHECK THE BCM (Body Control Module) WINDSHIELD WIPER SWITCH PIDs

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

- Monitor the BCM (Body Control Module) PIDs listed below while operating the wiper/washer switch in the INTERMITTENT, LOW and HIGH positions.
- Front Wiper Interval/Auto Wiper Switch (FRNWIPER_Int)

- Front Wiper Command Low Speed (FRNWIPER_Lo)

- Front Wiper Command High Speed (FRNWIPER_Hi)


Does the status of each PID match the wiper/washer switch setting?

Yes
GO to C4.

No
GO to C3.

C3 CHECK THE WIPER/WASHER SWITCH

- Ignition OFF.

- Disconnect: Wiper/Washer Switch C2081.

- Carry out the wiper/washer switch component test.

Does the wiper/washer switch pass the component test?

Yes
GO to C5.

No
INSTALL a new wiper/washer switch. TEST the system for normal operation.

C4 CHECK WINDSHIELD WIPER MOTOR LOW AND HIGH RELAY OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: Windshield Wiper Motor C125.

- Disconnect: BCM (Body Control Module) C2280A.

- Ignition ON.

- Measure the voltage between windshield wiper motor C125-1, circuit CRW15 (BN/WH), harness side and ground and between windshield wiper motor C125-2, circuit CRW16 (GY/BN), harness side and ground.





Is voltage present on either circuit?

Yes
REPAIR the affected circuit. TEST the system for normal operation.

No
GO to C5.

C5 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Ignition OFF.

- Inspect the BCM (Body Control Module) connectors for the following conditions:
- corrosion

- damaged or pushed out pins


- Connect the BCM (Body Control Module) connectors and make sure they seat correctly.

- Connect: Windshield Wiper Motor C125.

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

Is the concern still present?

Yes
INSTALL a new BCM (Body Control Module). 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.