Wednesday, December 4, 2019

2010 Cadillac Truck Escalade AWD V8-6.2L Page 798

2010 Cadillac Truck Escalade AWD V8-6.2L Page 798

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B3922 00

- Front Wiper Function Select Circuit

Diagnostic Fault Information

Circuit/System Description

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

washer switch through three 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.

Conditions for Running the DTC

The ignition switch is in the ON position.

Conditions for Setting the DTC

The BCM detects a short to ground on the windshield wiper switch low signal circuit.

Action Taken When the DTC Sets

* The BCM will not activate the low speed output.

* The windshield wipers will only operate in the high speed mode.

Conditions for Clearing the DTC

* The DTC will clear the current status when the condition for setting the fault is corrected.

* 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

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