Pinpoint Test G: The Intermittent Wiper Speed Does Not Operate Correctly (Low Speed OK) - Front
Wipers and Washers
Pinpoint Tests
Pinpoint Test G: The Intermittent Wiper Speed Does Not Operate Correctly (Low Speed OK) - Front
Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, the Generic Electronic Module (GEM) receives open and ground inputs from the wiper/washer switch through circuits 91S-KA11 (BK/RD), 31-KA8 (BK), 8-KA47 (WH/GN), 8-KA46 (WH/BU) and 8-KA45 (WH/RD) to activate the wipers to the appropriate modes. Mode of operation is dependent on the signal(s) received from the wiper/washer switch. The front wiper relay is only active in LOW-speed and MIST. When LOW or MIST is selected on the wiper/washer switch, ground is supplied to the front wiper relay through circuit 31S-KA12 (BK/WH), which activates the front wiper relay. When the front wiper relay is activated, voltage is supplied directly to the low-speed windshield wiper motor input. In intermittent and high-speed mode (front wiper relay is inactive), the GEM supplies voltage to the windshield wiper motor through circuit 32-KA9 (WH/BU)/32-KA10 (WH/GN) (low-speed feed) and 32-KA11 (WH/BK) (high-speed feed).
- DTC B1439 (Wiper Mode Select Switch Circuit Open) - Sets if INTERMITTENT position is not seen during on-demand self test.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- GEM
PINPOINT TEST G: THE INTERMITTENT WIPER SPEED DOES NOT OPERATE CORRECTLY (LOW SPEED OK) - FRONT
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: If the wipers immediately stop on the windshield as soon as they are turned off, GO to Pinpoint Test H. Pinpoint Test H: The Wipers Will Not Park At The Correct Position - Front
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G1 CHECK THE WIPER/WASHER SWITCH
- Ignition OFF.
- Disconnect: Wiper/Washer Switch C2081 .
- Carry out the Wiper/Washer Switch Component Test.
Refer to Wiper Switch for component testing.
- Did the wiper/washer switch pass the component test?
Yes
GO to G2.
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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G2 CHECK CIRCUITS 31-KA8 (BK), 8-KA47 (WH/GN), 8-KA46 (WH/BU) AND 8-KA45 (WH/RD) FOR AN OPEN
- Disconnect: Windshield Wiper Motor C125 .
- Disconnect: GEM C201B .
- Disconnect: GEM C201E .
- Using the following table, measure the resistance between wiper/washer switch C2081, harness side and GEM C201B or C201E, harness side:
- Is the resistance less than 5 ohms?
Yes
GO to G3.
No
REPAIR the circuit(s) in question. TEST the system for normal operation.
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G3 CHECK CIRCUITS 31-KA8 (BK), 8-KA47 (WH/GN), 8-KA46 (WH/BU) AND 8-KA45 (WH/RD) FOR A SHORT TO GROUND
- Using the following table, measure the resistance between wiper/washer switch C2081, harness side and ground:
- Is the resistance greater than 10,000 ohms?
Yes
GO to G4.
No
REPAIR the circuit(s) in question. TEST the system for normal operation.
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G4 CHECK FOR CORRECT GEM MODULE OPERATION
- Disconnect the GEM electrical connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect the GEM connectors and make sure they seat correctly.
- Reconnect all the wiper system components.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new GEM Service and Repair. 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.
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