C0710

DTC C0710

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0710 0F
- Steering Position Signal Erratic

DTC C0710 17
- Steering Position Signal Signal Shape/Waveform Failure

DTC C0710 55
- Steering Position Signal Expected Number of Transitions/Events not Reached

DTC C0710 5A
- Steering Position Signal Plausibility Failure

Circuit/System Description

The steering wheel position sensor supplies 2 analog inputs, Phase A and Phase B, to the electronic brake control module (EBCM). The 2 input signals are approximately 90 degrees out of phase. By interpreting the relationship between the 2 inputs, the EBCM can determine the position of the steering wheel and the direction of the steering wheel rotation.

Conditions for Running the DTC

* Ignition ON.
* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

* Phase A and Phase B signal resistance values do not correlate to one another.
* The calculated steering angle from the steering wheel position sensor does not correlate with the steering angle calculated from the yaw rate.

Action Taken When the DTC Sets

* The EBCM turns OFF the 5-volt reference circuit, until the ignition is cycled.
* The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
* The driver information center (DIC) displays the Service Stability System message.
* The antilock brake system (ABS) remains functional.
* The Traction Control indicator illuminates.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

* If the steering wheel position sensor is disconnected, DTCs will set and the EBCM will not provide 5-volt reference.
* A poor ground connection for the EBCM may cause this DTC to set.

Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for EBCM scan tool information.

Circuit/System Verification

1. Ignition ON, observe the DTC information with the scan tool.

• Verify that DTC C0292 has not set. If DTC C0292 has set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions).

2. Ignition OFF, disconnect the steering wheel position sensor (SWPS) connector.
3. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal 8 and ground.

• If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit terminals 1 and 25 for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.

4. Test the signal phase A circuit terminal 3, signal phase B circuit terminal 4, and 5-volt reference circuit terminal 1, and the low reference circuit terminal 8 for an open/high resistance or a short to voltage or ground.

• If all circuits test normal, replace the SWPS.
• If the DTC sets again after replacing the SWPS, replace the EBCM.

Repair Instructions

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

* Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement (Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming