C0710

DTC C0710

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy 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 00
- Steering Position Signal



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

* 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 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 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 (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 scan tool information

Circuit/System Verification

1. Position the steering wheel to the straight -ahead centered, position.
2. Ignition ON, observe the SWPS Signal A and SWPS Signal B in EBCM scan tool data display. One of the signals should be approximately 2.5 volts and the other circuit should be approximately 0 volts.
3. As the steering wheel is turned, each signal should travel smoothly between 0 and 5 volts.


Circuit/System Testing

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

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

3. Test the signal A circuit, signal B circuit, 5-volt reference circuit terminal 1, and the low reference circuit terminal 2 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 Replacement (Manual Steering Column with JL4) (Steering Wheel Position Sensor Replacement (Manual Steering Column with JL4))Steering Wheel Position Sensor Replacement (Power Steering Column with JL4) (Steering Wheel Position Sensor Replacement (Power Steering Column with JL4))
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming