C0710

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 00
- Steering Position Signal No Additional Information




Diagnostic Fault Information






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

* The ignition is 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 turns ON.



Conditions for Clearing the DTC

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



Diagnostic Aids

* If DTC C0292 is set, diagnose that DTC first.
* 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
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for EBCM


Circuit/System Verification

1. Position the steering wheel to the straight-ahead, centered, position.
2. Install a scan tool, ignition ON, engine OFF, and view Digital SWPS Signal Phase A and SWPS Signal Phase B. One of the signals should read Low and the other should read High.
3. As the steering wheel is turned, SWPS Signal A signal should travel smoothly between 0 and 5 volts.



Circuit/System Testing

1. Ignition OFF, disconnect the steering wheel position sensor (SWPS) connector.
2. 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 11 and 28 for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.

3. Test the signal phase A circuit, signal phase B circuit, 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 after completing the diagnostic procedure.

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