Pinpoint Test C: The High/Low Wiper Speeds Do Not Operate Correctly
Wipers and Washers
Pinpoint Tests
Pinpoint Test C: The High/Low Wiper Speeds Do Not Operate Correctly
Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) receives input from the multifunction switch through circuits CRW18 (VT/WH), CRW19 (BU/OG), CRW08 (VT/OG) and CRW17 (GN/VT). To enable the wipers, the SJB activates the RUN/PARK relay through circuit RRW24 (GN/VT). When the RUN/PARK relay is activated, voltage is supplied back to the SJB through circuit CRW03 (VT/WH) into the (integral) HIGH/LOW relay. The windshield wiper motor receives power from the HIGH/LOW relay (integral to the SJB) through circuit CRW16 (GY/BN) for low speed and circuit CRW15 (BN/WH) for high speed. The windshield wiper motor is grounded through circuit GD121 (BK/YE). The multifunction switch is grounded through circuit GD116 (BK/VT).
- DTC B2183 Front Wiper Select Switch "H" Short to Ground - Switch input shorted to ground.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- Windshield wiper motor
- SJB
PINPOINT TEST C: THE HIGH/LOW WIPER SPEEDS DO NOT OPERATE CORRECTLY
-------------------------------------------------
C1 RETRIEVE THE RECORDED DTCs FROM THE WIPER CONTROL SELF-TEST
- Ignition ON.
- Use the recorded SJB DTCs from the Wiper Control Self-Test.
- Are any DTCs recorded?
Yes
For DTC B1432, Go To Pinpoint Test A. Pinpoint Test A: The Wipers are Inoperative
For DTC B1433, Go To Pinpoint Test B. Pinpoint Test B: The Wipers Stay On Continuously
For DTC B1447, Go To Pinpoint Test F. Pinpoint Test F: The Wipers Do Not Park at the Correct Position
No
GO to C2.
-------------------------------------------------
C2 CHECK THE MULTIFUNCTION SWITCH INPUT TO THE SJB - MONITOR SJB PIDS FRNWIPER_A, FRNWIPER_B, FRNWIPER_C AND FRNWIPER_H
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB PIDs FRNWIPER_A, FRNWIPER_B, FRNWIPER_C and FRNWIPER_H while turning the multifunction switch through all positions.
- Refer to table.
- Do the PID values agree with the multifunction switch positions?
Yes
GO to C5.
No
GO to C3.
-------------------------------------------------
C3 CHECK THE MULTIFUNCTION SWITCH
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.
- Did the multifunction switch pass the component test?
Yes
GO to C4.
No
INSTALL a new multifunction switch. TEST the system for normal operation.
-------------------------------------------------
C4 CHECK CIRCUIT CRW17 (GN/VT), CRW18 (VT/WH), CRW08 (VT/OG) AND CRW19 (BU/OG) FOR AN OPEN OR SHORT TO GROUND
- Disconnect: SJB C2280d.
- Measure the resistance between multifunction switch and SJB; and between the multifunction switch and ground as follows:
- Is the resistance between the multifunction switch and SJB less than 5 ohms; and greater than 10,000 ohms between the multifunction switch and ground?
Yes
GO to C9.
No
REPAIR the circuit in question. TEST the system for normal operation.
-------------------------------------------------
C5 CHECK CIRCUIT CRW15 (BN/WH) FOR VOLTAGE
- Disconnect: Windshield Wiper Motor C125.
- Place the multifunction switch to the HIGH speed position.
- Measure the voltage between wiper motor C125-3, circuit CRW15 (BN/WH), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to C7.
No
GO to C6.
-------------------------------------------------
C6 CHECK CIRCUIT CRW15 (BN/WH) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280a.
- Measure the resistance between wiper motor C125-3, circuit CRW15 (BN/WH), harness side and SJB C2280a-2, circuit CRW15 (BN/WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to C9.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
C7 CHECK CIRCUIT CRW16 (GY/BN) FOR VOLTAGE
- Disconnect: Windshield Wiper Motor C125.
- Place the multifunction switch to the LOW speed position.
- Measure the voltage between wiper motor C125-5, circuit CRW16 (GY/BN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor Service and Repair. TEST the system for normal operation.
No
GO to C8.
-------------------------------------------------
C8 CHECK CIRCUIT CRW16 (GY/BN) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280a.
- Measure the resistance between wiper motor C125-5, circuit CRW16 (GY/BN), harness side and SJB C2280a-3, circuit CRW16 (GY/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to C9.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
C9 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------