Pinpoint Test D: The Wipers Stay ON Continuously - Rear Window
Wipers and Washers
Pinpoint Test D: The Wipers Stay ON Continuously - Rear Window
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 CONTINUOUS and INTERMITTENT wiper functions. Both functions share a 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 (depending on windshield wiper setting).
- DTC B11DC:92 (Rear Wiper Mode Switch: Performance or Incorrect Operation)- sets during self-test when the rear wiper interval switch circuit is grounded.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wiper/washer switch
- Rear window wiper motor
- BCM (Body Control Module)
PINPOINT TEST D : THE WIPERS STAY ON CONTINUOUSLY - REAR WINDOW
D1 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 D2.
D2 CHECK THE BCM (Body Control Module) PID REAR WIPER INPUT SWITCH STATUS (R_WP-SW)
- Enter the following diagnostic mode on the scan tool: DataLogger- BCM (Body Control Module).
- Monitor the BCM (Body Control Module) PID R_WP-SW while operating the wiper/washer switch in the rear wiper mode.
Does the status of the PID match the wiper/washer switch setting?
Yes
GO to D5.
No
GO to D3.
D3 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 D4.
No
INSTALL a new wiper/washer switch. TEST the system for normal operation.
D4 CHECK THE REAR WIPER INTERVAL CIRCUIT FOR A SHORT TO GROUND
- Disconnect: BCM (Body Control Module) C2280E.
- Measure the resistance between wiper/washer switch C2081-4, circuit CRW20 (GY/YE), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to D6.
No
REPAIR the affected circuit. TEST the system for normal operation.
D5 CHECK REAR WINDOW WIPER SUPPLY AND WIPER MOTOR RELAY OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Rear Window Wiper Motor C4218.
- Measure the voltage between rear window wiper motor C4218-1, circuit CRW02 (GY/BU), harness side and ground and between rear window wiper motor C4218-2, circuit CRW05 (BU), harness side and ground.
Is any voltage present?
Yes
REPAIR the affected circuit. TEST the system for normal operation.
No
GO to D6.
D6 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: Wiper/Washer Switch C2081.
- 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 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.