2010 Cadillac CTS Sedan AWD V6-3.6L Page 632

2010 Cadillac CTS Sedan AWD V6-3.6L Page 632

Circuit/System Description

The body control module (BCM) controls the washer motor based on an input from the windshield wiper washer switch. The BCM monitors the

washer switch through the windshield washer switch signal circuit. When the WASH switch is closed, ground is supplied to the windshield washer

switch signal circuit. When this is seen, the BCM will command the windshield washer fluid pump and the low speed wipers on.

Conditions for Running the DTC

A washer request is present.

Conditions for Setting the DTC

A short to voltage is detected in the windshield washer relay control circuit.

Action Taken When the DTC Sets

Washer operation is suspended.

Conditions for Clearing the DTC

* A current DTC will clear when the condition for setting the fault is no longer seen.

* A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Reference Information

Schematic Reference

Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers) (See: Wiper and Washer Systems/Description and

Operation/Wiper/Washer System Description and Operation (Wiper and Washers))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

Operate the washers using the WASH switch. Verify the washer pump activates.

Circuit/System Testing

1. Ignition OFF, disconnect the FRT/WSW relay.

2. Connect a test lamp between the control circuit 86 and B+.

3. Ignition ON, command the washers ON and OFF using the WASH switch. The test lamp should turn ON and OFF when changing between

the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace