Pinpoint Test F: The Wipers Do Not Park at the Correct Position
Wipers and Washers
Pinpoint Tests
Pinpoint Test F: The Wipers Do Not Park at the Correct Position
Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
With the ignition key in RUN or ACC, the windshield wiper motor receives voltage at all times from the wiper PARK relay through circuit SBB09 (RD). When the wipers are commanded OFF, the Smart Junction Box (SJB) deactivates the RUN/PARK relay. Voltage is supplied from the park switch (integral to the wiper motor) to the RUN/PARK relay through circuit CRW09 (BN/BU) to operate the wipers until they are parked. When the wipers are parked, the park switch (integral to the wiper motor) supplies ground to the RUN/PARK relay and the wipers will stop. The SJB monitors circuit CRW09 (BN/BU) for voltage when wipers are not parked and ground when the wipers are parked.
- DTC B1447 Wiper Park Sense Circuit Open - Switch input open.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Windshield wiper motor
- PARK relay
- RUN/PARK relay
- SJB
PINPOINT TEST F: THE WIPERS DO NOT PARK AT THE CORRECT POSITION
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F1 RETRIEVE THE RECORDED DTCs FROM THE SJB WIPER CONTROL SELF-TEST
- Use the recorded SJB Wiper Control Self-Test DTCs.
- Is DTC B1447 present?
Yes
GO to F9.
No
GO to F2.
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F2 CHECK CIRCUIT SBB09 (RD) FOR VOLTAGE
- Disconnect: Windshield Wiper Motor C125.
- Ignition ON.
- Measure the voltage between wiper motor C125-2, circuit SBB09 (RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to F7.
No
GO to F3.
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F3 CHECK THE WIPER PARK RELAY
- Disconnect: Windshield Wiper PARK Relay.
- Carry out the Wiper Park Relay Component Test.
- Did the wiper PARK relay pass the component test?
Yes
GO to F4.
No
INSTALL a new wiper PARK relay. TEST the system for normal operation.
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F4 CHECK CIRCUIT SBB09 (RD) FOR VOLTAGE
- Measure the voltage between windshield wiper PARK relay pin 30, circuit SBB09 (RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to F5.
No
VERIFY the Battery Junction Box (BJB) fuse 9 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. TEST the system for normal operation.
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F5 CHECK CIRCUIT CBP23 (BN/YE) FOR VOLTAGE
- Measure the voltage between the windshield wiper PARK relay pin 86, circuit CBP23 (BN/YE), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to F6.
No
REPAIR the circuit. TEST the system for normal operation.
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F6 CHECK CIRCUIT GD121 (BK/YE) FOR GROUND
- Ignition OFF.
- Measure the resistance between windshield wiper PARK relay pin 85, circuit GD121 (BK/YE), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
REPAIR open in circuit SBB09 (RD). TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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F7 CHECK THE WIPER RUN/PARK RELAY
- Disconnect: Windshield Wiper RUN/PARK Relay.
- Carry out the Wiper Run/Park Relay Component Test.
- Did the RUN/PARK relay pass the component test?
Yes
GO to F8.
No
INSTALL a new RUN/PARK relay. TEST the system for normal operation.
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F8 CHECK CIRCUIT CRW09 (BN/BU) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between the windshield wiper RUN/PARK relay pin 87A, circuit CRW09 (BN/BU), harness side and wiper motor C125-1, circuit CRW09 (BN/BU), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor Service and Repair. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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F9 CHECK CIRCUIT CRW09 (BN/BU) FOR AN OPEN
- Ignition OFF.
- Disconnect: Windshield Wiper Motor C125.
- Disconnect: SJB C2280a.
- Measure the resistance between SJB C2280a-23, circuit CRW09 (BN/BU), harness side and windshield wiper motor C125-1, circuit CRW09 (BN/BU).
- Is the resistance less than 5 ohms?
Yes
If wipers park correctly but DTC B1447 was present, GO to F10.
If wipers do not park correctly, INSTALL a new windshield wiper motor. REFER to Wiper Motor Service and Repair. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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F10 CHECK FOR CORRECT SJB OPERATION
- Ignition OFF.
- 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.
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