2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 948

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 948

C0545

DTC C0545

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 C0545 00

- Steering Wheel Torque Input Sensor

Diagnostic Fault Information

Circuit/System Description

The power steering control module (PSCM) continuously monitors the torque sensor input and output shaft sine wave frequency signals. As the

steering wheel is turned and torsional twist is applied to the steering column shaft, the torque sensors input and output shaft sine wave frequency

signals are processed by the PSCM to detect and calculate the steering torque.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

* The PSCM detects open, short to ground or short between any of the torque sensor circuits.

* The PSCM detects the steering torque is outside the valid range of -7 to +7 Nm.

Actions Taken When DTC Sets

* DTC C0545 is stored in memory.

* 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

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

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) (See: Steering and Suspension/Steering/Description and

Operation/Power Steering System Description and Operation (Hydraulic Power Steering))Power Steering System Description and Operation (EPS)

(See: Steering and Suspension/Steering/Description and Operation/Power Steering System Description and Operation (EPS))

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