Pinpoint Test E: The HIGH/LOW/INTERMITTENT Wiper Speeds Do Not Operate Correctly - Windshield

Wipers and Washers

Pinpoint Test E: The HIGH/LOW/INTERMITTENT Wiper Speeds Do Not Operate Correctly - 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) reacts to the grounded signal voltage(s) and its integral electronics make a decision on which wiper system function to carry out. The wiper/washer switch has a rheostat (variable resistor) which, when moved, changes the time delay between wipes. The BCM (Body Control Module) monitors the position of the rheostat through a sense line.

- DTC B1008:92 (Wiper Mode Switch: Performance or Incorrect Operation)- sets when the INTERMITTENT mode is grounded at the same time as the LOW and/or HIGH speed functions for more than 2 seconds.

- DTC B1C53:13 (Front Wiper Intermittent Data: Circuit Open)- sets when the front interval potentiometer input circuit is open.

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 E : THE HIGH/LOW/INTERMITTENT WIPER SPEEDS DO NOT OPERATE CORRECTLY - WINDSHIELD

E1 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
For DTC B1008:92, GO to E5.

For DTC B1C53:13, GO to E4.

For all other BCM (Body Control Module) DTCs, REFER to the Body Control Module (BCM) DTC Chart for further diagnosis Wiper and Washer Systems.

No
GO to E2.

E2 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 Select Switch A (FRNWIPER_A)

- Front Wiper Select Switch B (FRNWIPER_B)

- Front Wiper Select Switch C (FRNWIPER_C)

- Front Wiper Command Low Speed (FRNWIPER_Lo)

- Front Wiper Command High Speed (FRNWIPER_Hi)

- Front Wiper Interval / Auto Wiper Switch (FRNWIPER_Int)

- Front Wiper Command Low Speed (FRNWIPER_Lo)

- Front Wiper Command High Speed (FRNWIPER_Hi)


- Monitor the BCM (Body Control Module) PIDs FRNWIPER_A, FRNWIPER_B and FRNWIPER_C in each INTERMITTENT setting and refer to the table below.

INTERMITTENT Setting FRNWIPER_A FRNWIPER_B FRNWIPER_C Level 1 Active Inactive Inactive Level 2 Inactive Active Inactive Level 3 Active Active Inactive Level 4 Inactive Inactive Active Level 5 Active Inactive Active Level 6 Inactive Active Active

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

Yes
GO to E6.

No
GO to E3.

E3 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 E4.

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

E4 CHECK WIPER/WASHER SWITCH WINDSHIELD WIPER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE

- Ignition OFF.

- Disconnect: Wiper/Washer Switch C2081 (if not previously disconnected).

- Disconnect: BCM (Body Control Module) C2280E.

- Disconnect: BCM (Body Control Module) C2280F.

- Measure the resistance between wiper/washer switch C2081, harness side and BCM (Body Control Module) C2280E and C2280F, harness side as follows:

Wiper/Washer Switch Circuit BCM (Body Control Module) C2081-3 CRW10 (BU/GN) C2280F-3 C2081-5 CRW17 (GN/VT) C2280F-16 C2081-8 CRW08 (VT/OG) C2280F-9 C2081-9 VRW11 (GN/BN) C2280E-6 C2081-10 CRW18 (VT/WH) C2280F-6






Are the resistances less than 5 ohms?

Yes
GO to E5.

No
REPAIR the affected circuit. TEST the system for normal operation.

E5 CHECK WIPER/WASHER SWITCH WINDSHIELD WIPER CIRCUITS FOR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: Wiper/Washer Switch C2081 (if not previously disconnected).

- Disconnect: BCM (Body Control Module) C2280E (if not previously disconnected).

- Disconnect: BCM (Body Control Module) C2280F (if not previously disconnected).

- Measure the resistance between wiper/washer switch C2081, harness side and ground as follows:

Wiper/Washer Switch Circuit C2081-3 CRW10 (BU/GN) C2081-8 CRW08 (VT/OG) C2081-9 VRW11 (GN/BN) C2081-10 CRW18 (VT/WH)






Are the resistances greater than 10,000 ohms?

Yes
GO to E9.

No
REPAIR the affected circuit. TEST the system for normal operation.

E6 CHECK WINDSHIELD WIPER MOTOR LOW AND HIGH RELAY OUTPUT CIRCUITS FOR AN OPEN OR HIGH RESISTANCE

- Ignition OFF.

- Disconnect: Windshield Wiper Motor C125.

- Disconnect: BCM (Body Control Module) C2280A.

- Measure the resistance between windshield wiper motor C125-1, circuit CRW15 (BN/WH), harness side and BCM (Body Control Module) C2280A-10, circuit CRW15 (BN/WH), harness side and between windshield wiper motor C125-2, circuit CRW16 (GY/BN), harness side and BCM (Body Control Module) C2280A-9, circuit CRW16 (GY/BN), harness side.





Are the resistances less than 5 ohms?

Yes
GO to E7.

No
REPAIR the affected circuit. TEST the system for normal operation.

E7 CHECK FOR VOLTAGE TO THE WINDSHIELD WIPER MOTOR USING THE BCM (Body Control Module) PIDs FRONT WIPER RELAY - LOW SPEED (WPR_RLY_F_Lo) AND FRONT WIPER RELAY - FAST SPEED (WPR_RLY_F_Hi)

- Connect: BCM (Body Control Module) C2280A.

- Ignition ON.

- Command the BCM (Body Control Module) PID WPR_RLY_F_Lo on.

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





- Command the BCM (Body Control Module) PID WPR_RLY_F_Hi on.

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





Are the voltages greater than 10 volts?

Yes
GO to E8.

No
GO to E9.

E8 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION

- Ignition OFF.

- Inspect windshield wiper motor C125 for the following conditions:
- corrosion

- damaged or pushed out pins


- Connect the windshield wiper motor C125 and make sure it seats correctly.

- Connect: BCM (Body Control Module) C2280E.

- Connect: BCM (Body Control Module) C2280F.

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

Is the concern still present?

Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor - Windshield Wiper Motor - Windshield. 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.

E9 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 (if previously disconnected).

- Connect: Windshield Wiper Motor C125 (if previously disconnected).

- 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.