Pinpoint Test G: The Washer Pump Is Inoperative Or Always On - Vehicles Not Equipped With Front Video Camera

Wipers and Washers

Pinpoint Test G: The Washer Pump Is Inoperative Or Always On - Vehicles Not Equipped With Front Video Camera


Normal Operation

When the multifunction switch is placed in the WASH position, the Steering Column Control Module (SCCM) sends the request to the wiper motor over the Local Interconnect Network (LIN). The wiper motor then supplies power to the washer pump, which directs washer fluid to the windshield.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Washer pump

- Windshield wiper motor

- SCCM (Steering Column Control Module)

PINPOINT TEST G : THE WASHER PUMP IS INOPERATIVE OR ALWAYS ON - VEHICLES NOT EQUIPPED WITH FRONT VIDEO CAMERA

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.

G1 CHECK THE MULTIFUNCTION SWITCH INPUT

- Ignition ON.

- Using a scan tool, monitor the SCCM (Steering Column Control Module) F_WASH_SW PID.

- Press and release the washer switch on the multifunction switch.

Does the PID indicate correctly when the switch pressed and released?

Yes
If the washer pump is always on, GO to G2.

If the washer pump is inoperative, GO to G3.
No
INSTALL a new multifunction switch.

If the concern is still present, INSTALL a new SCCM (Steering Column Control Module).

G2 CHECK THE WASHER PUMP SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: Windshield Wiper Motor C125.

- Ignition ON.

Does the washer pump continue to operate?

Yes
REPAIR the circuit.
No
INSTALL a new windshield wiper motor. REFER to Wiper Motor .

G3 CHECK THE WASHER PUMP CONTROL CIRCUIT INTEGRITY

- Ignition OFF.

- Disconnect: Washer Pump C137.

- Connect a test light between:

Pin Circuit Pin Circuit- Positive battery post C137-1 CRW14 (BU/WH)







Does the test light illuminate?

Yes
GO to G5.
No
GO to G4.

G4 CHECK THE WASHER PUMP CONTROL CIRCUIT FOR AN OPEN

- Measure the resistance between:

Positive Lead Negative Lead Pin Circuit Pin Circuit C125-7 CRW14 (BU/WH) C137-1 CRW14 (BU/WH)







Is the resistance less than 3 ohms?

Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor .
No
REPAIR the circuit.

G5 CHECK THE WASHER PUMP GROUND CIRCUIT FOR AN OPEN

- Connect a test light between:

Pin Circuit Pin Circuit- Positive battery post C137-2 GD120 (BK/GN)








Does the test light illuminate?

Yes
INSTALL a new washer pump. REFER to Washer Pump .
No
REPAIR the circuit.