2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 946

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 946

瀚慖f less than the specified range, test the circuits for a short to ground. If the circuits test normal, replace the power steering assist motor.

8. If all circuits test normal, test or replace the PSCM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Power Steering Wiring Harness Extension Harness Replacement (HP2) ()

* Power Steering Assist Motor Replacement (See: Steering and Suspension/Steering/Power Steering/Power Steering Motor/Service and

Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for PSCM replacement, setup, and programming

C0475

DTC C0475

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) provide overview of each diagnostic category.

DTC Descriptor

DTC C0475 00

- Electric Steering Motor Circuit

Diagnostic Fault Information

Circuit/System Description

The power steering control module (PSCM) continuously monitors the voltage and current levels being commanded to the electric power steering

(EPS) motor. The 42-volt circuit from the accessory power module (APM) supplies power to the PSCM pulse width modulated control circuit to

drive the 3 phase motor. The PSCM compares the desired and actual current levels to detect malfunctions in the EPS motor, or the circuits to the

motor.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The PSCM detects an open, or a short to ground on any of the motor phase circuits.

Actions Taken When DTC Sets

* The driver information center (DIC) displays the SERVICE POWER STEERING warning message.

* No steering assist.

Conditions for Clearing the DTC

* A current DTC will clear on the next malfunction free ignition cycle.

* A history DTC will clear after 100 consecutive malfunction free ignition cycles.

Reference Information

Schematic Reference

Power Steering Schematics (See: Steering and Suspension/Steering/Diagrams/Electrical Diagrams)

Connector End View Reference