C0710

DTC C0710

DTC Descriptor
DTC C0710 00
- Steering Position Signal No Additional Information

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview





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

Connector End View Reference

Antilock Brake System Connector End Views

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

Scan Tool Reference

Scan Tool Data List 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 SWPS Signal 1 and SWPS Signal 2. One of the signals should be approximately 2.5 volts and the other 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.
2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit and ground.

- If greater than 1 ohm, test the low reference circuit and the EBCM ground 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, and the low reference circuit 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. Verification Tests

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