Power Steering

DTC C0710

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0710 71
- Steering Position Signal Invalid Data

Diagnostic Fault Information






Circuit/System Description

The power steering control module monitors the steering angle sensor signal via the GMLAN serial data circuit. The power steering control module utilizes this signal to determine a center point for Active Return and Soft End Stops. Upon detecting an invalid steering angle sensor signal, the power steering control module will disable Active Return and Soft End Stops, then set a DTC.

Note: To most drivers the loss of Active Return and Soft End Stops may not be noticeable as there is no visual indicator activated on the instrument cluster or driver information display.

There is no diagnosable cause with the power steering control module when this DTC is set, DO NOT REPLACE POWER STEERING CONTROL MODULE OR STEERING GEAR DUE TO THIS DTC.

For diagnosis of an invalid steering angle sensor signal, refer to DTC C0710 Antilock Brake System also diagnosis in Antilock Brake System.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

The power steering control module has received on of the following serial data messages listed below from the external steering angle sensor.

* Steering angle range is exceeded

* Steering angle sensor is not calibrated

* Steering angle sensor is initialized

* Steering angle sensor message: Roll Counter is INVALID

* Steering angle sensor message: Present Bit is FALSE (not common)

* Steering angle sensor message: Error Flag is set to TRUE

Action Taken When the DTC Sets

* The electronic brake control module disables the stability control for the duration of the ignition cycle.

* Active Return and Software End Stops are deactivated.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* When the steering angle sensor signal becomes valid, the fault will set to History and can be cleared with a scan tool.

Diagnostic Aids

The car should not pull in either direction causing the steering wheel to be OFF center while driving straight ahead on a level surface.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Outside Rearview Mirror - Driver

Description and Operation

ABS Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. With a scan tool, verify that DTC C0710 71 is not set.

• If DTC C0710 71 is set
Refer to DTC C0710 Antilock Brake System in Antilock Brake System Diagnostic Information and Procedures.

• If DTC C0710 71 is not set

3. All OK.