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. Diagrams By Number
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 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 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
PINPOINT TEST E: THE HIGH/LOW/INTERMITTENT WIPER SPEEDS DO NOT OPERATE CORRECTLY - WINDSHIELD
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E1 CHECK FOR BCM DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self-Test - BCM.
- Are any BCM DTCs present?
Yes
For DTC B1008:92, GO to E5.
For DTC B1C53:13, GO to E4.
For all other BCM DTCs, REFER to the Body Control Module (BCM) DTC Chart for further diagnosis. [1][2]Diagnostic Trouble Code Descriptions
No
GO to E2.
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E2 CHECK THE BCM WINDSHIELD WIPER SWITCH PIDs
- Enter the following diagnostic mode on the scan tool: DataLogger - BCM.
- Monitor the BCM 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 PIDs FRNWIPER_A, FRNWIPER_B and FRNWIPER_C in each INTERMITTENT setting and refer to the table below.
- Does the status of each PID match the wiper/washer switch setting?
Yes
GO to E6.
No
GO to E3.
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E3 CHECK THE WIPER/WASHER SWITCH
- Ignition OFF.
- Disconnect: Wiper/Washer Switch C2081.
- Carry out the wiper/washer switch component test.
Refer to Windshield Washer Switch or Wiper Switch for component testing.
- Does the wiper/washer switch pass the component test?
Yes
GO to E4.
No
INSTALL a new wiper/washer switch. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.
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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 C2280E.
- Disconnect: BCM C2280F.
- Measure the resistance between wiper/washer switch C2081, harness side and BCM C2280E and C2280F, harness side as follows:
- Are the resistances less than 5 ohms?
Yes
GO to E5.
No
REPAIR the affected circuit. TEST the system for normal operation.
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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 C2280E (if not previously disconnected).
- Disconnect: BCM C2280F (if not previously disconnected).
- Measure the resistance between wiper/washer switch C2081, harness side and ground as follows:
- Are the resistances greater than 10,000 ohms?
Yes
GO to E9.
No
REPAIR the affected circuit. TEST the system for normal operation.
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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 C2280A.
- Measure the resistance between windshield wiper motor C125-1, circuit CRW15 (BN/WH), harness side and BCM C2280A-10, circuit CRW15 (BN/WH), harness side and between windshield wiper motor C125-2, circuit CRW16 (GY/BN), harness side and BCM 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.
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E7 CHECK FOR VOLTAGE TO THE WINDSHIELD WIPER MOTOR USING THE BCM PIDs FRONT WIPER RELAY - LOW SPEED (WPR_RLY_F_Lo) AND FRONT WIPER RELAY - FAST SPEED (WPR_RLY_F_Hi)
- Connect: BCM C2280A.
- Ignition ON.
- Command the BCM 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 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.
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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 C2280E.
- Connect: BCM 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.
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E9 CHECK FOR CORRECT BCM OPERATION
- Ignition OFF.
- Inspect the BCM connectors for the following conditions:
- corrosion
- damaged or pushed out pins
- Connect the BCM 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. REFER to Multifunction Electronic Modules Body Control Module (BCM). 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.
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