Service Information

Volt

DTC C0710

Diagnostic Instructions

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

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

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

DTC Descriptor

DTC C0710 71: Steering Position Signal Invalid Data

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
CAN Bus High Serial Data	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	C0710 5A, C0710 71
CAN Bus Low Serial Data	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	C0710 5A, C0710 71

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 cause that can be diagnosed 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 Antilock Brake System Diagnostic Information and Procedures.

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

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

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

⇒	*If DTC C0710 71 is set*

Refer to DTC C0710 in Antilock Brake System Diagnostic Information and Procedures.

⇓	*If DTC C0710 71 is not set*

All OK.