C0710

DTC C0710

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) 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 (SWPS) 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.

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

Conditions for Clearing the DTC

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

Diagnostic Aids

* During diagnosis, park the vehicle on a level surface.
* The car should not pull in either direction while driving straight on a level surface.
* The snapshot function on the scan tool can help find an intermittent DTC.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

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

Scan Tool Reference

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

Circuit/System Verification

1. Position the steering wheel in the center position with the wheels facing straight-ahead.
2. Engine running, observe the scan tool SWPS Signal A and SWPS Signal B parameters while turning the steering wheel. The readings should travel between 0-5 V and their should be approximately a 2.5 V difference between each signal.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering wheel position sensor (SWPS).
2. Ignition OFF for 60 seconds, test for less than 10 ohm between the low reference circuit terminal 2 and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

3. Disconnect the harness connector at the EBCM.
4. Test for less than 1 V between the 5 V reference circuit terminal 1 and ground.

• If greater than the specified range, test the 5 V reference circuit for a short to voltage.

5. Ignition OFF, test for infinite resistance between the 5 V reference circuit terminal 1 and ground.

• If less than the specified value, test the 5 V reference circuit for a short to ground.

6. Ignition OFF, test for less than 2 ohm between the 5 V reference circuit terminal 1 at the steering wheel position sensor harness connector and terminal 25 at the EBCM harness connector.

• If greater than the specified range, test the 5 V reference circuit for an open/high resistance.

7. Ignition ON, test for less than 1 V between the signal circuits listed below and ground.

* Steering Wheel Position Signal A terminal 5
* Steering Wheel Position Signal B terminal 6

• If greater than the specified range, test the signal circuit for a short to voltage.

8. Ignition OFF, test for infinite resistance between the signal circuit listed below and ground.

* Signal A terminal 5
* Signal B terminal 6

• If less than the specified value, test the signal circuit for a short to ground.

9. Test for less than 2 ohm between the signal circuit terminals listed below.

* Signal A terminal 5 at the steering wheel position sensor harness connector and terminal 39 at the EBCM harness connector.
* Signal B terminal 6 at the steering wheel position sensor harness connector and terminal 10 at the EBCM harness connector.

• If greater than the specified range, test the signal circuit for an open/high resistance.

10. If all circuits test normal, replace the steering wheel position sensor. If the DTC resets replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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