2010 Cadillac Truck SRX FWD V6-3.0L Page 688

2010 Cadillac Truck SRX FWD V6-3.0L Page 688

- Windshield Wiper High Speed Relay Circuit Open

Diagnostic Fault Information

Circuit/System Description

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

the wiper/washer switch through two separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to

determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation

through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high

or low.

Conditions for Running the DTC

* The DTC runs only when a wiper output is actively being requested by the BCM.

* The system voltage is between 9-16 V.

Conditions for Setting the DTC

* A short to ground is detected in the Front Wiper Relay control circuit or in the High Speed Relay control circuit.

* A short to voltage or an open/high resistance is detected in the High Speed Relay control circuit.

Action Taken When the DTC Sets

The BCM will not activate the wiper output.

Conditions for Clearing the DTC

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

* 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/Connector End Views By Name)

Description and Operation

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

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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