Pinpoint Test D: The Washer Pump Is Inoperative
Wipers and Washers
Pinpoint Tests
Pinpoint Test D: The Washer Pump is Inoperative
Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
The windshield washer pump is grounded at all times through circuit GD123 (BK/GY). When WASH mode is selected, the Smart Junction Box (SJB) receives input from the multifunction switch through circuit CRW07 (GY/BN). The SJB then activates the washer pump relay (integral to SJB) which supplies voltage to the washer pump through circuit CRW14 (BU/WH).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- SJB
- Windshield washer pump
PINPOINT TEST D: THE WASHER PUMP IS INOPERATIVE
-------------------------------------------------
D1 CHECK THE MULTIFUNCTION SWITCH INPUT TO THE SJB - MONITOR SJB PID FRNWIPER_W
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB PID FRNWIPER_W while moving the multifunction switch to the WASH position.
- Does the PID value agree with the multifunction switch position when WASH is selected?
Yes
GO to D4.
No
GO to D2.
-------------------------------------------------
D2 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 D3.
No
INSTALL a new multifunction switch. TEST the system for normal operation.
-------------------------------------------------
D3 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN
- Disconnect: SJB C2280d.
- Ignition OFF.
- Measure the resistance between multifunction switch C202-10, circuit CRW07 (GY/BN), harness side and SJB C2280d-31, circuit CRW07 (GY/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to D6.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
D4 CHECK CIRCUIT GD123 (BK/GY) FOR AN OPEN
- Ignition OFF.
- Disconnect: Washer Pump C137.
- Measure the resistance between washer pump C137-2, circuit GD123 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to D5.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
D5 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE
- Ignition ON.
- While activating the front washer pump using the multifunction switch, measure the voltage between windshield washer pump C137-1, circuit CRW14 (BU/WH), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new windshield washer pump. REFER to Washer Pump Service and Repair. TEST the system for normal operation.
No
VERIFY SJB fuse 14 (15A) is OK. If OK, GO to D6. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.
-------------------------------------------------
D6 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.
-------------------------------------------------