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




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

Component Connector End Views
Description and Operation

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

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

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Verification

1. Position the steering wheel centered and the wheels facing straight-ahead.
2. Engine running, observe the scan tool SWPS Signal A and SWPS Signal B parameters. Turning the steering wheel the readings should travel between 0 and 5 volts and their should be approximately a 2.5 volts difference between each signal.



Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering wheel position sensor.
2. Test for less than 5 ohm of resistance 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. Ignition ON, test for 4.8 - 5.2 volts between the 5-volt reference circuit terminal 1and ground.

• If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.


• If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.

4. Verify the scan tool SWPS Signal A and Signal B parameter is less than 0 volts.

• If greater than the specified range, test the appropriate signal circuit terminal for a short to voltage. If the circuit tests normal, replace the EBCM.

5. Install a 3A fused jumper wire at the 5-volt reference circuit terminal 1. Toggle the jumper wire between the 5-volt reference circuit terminal 1 and the signal A circuit terminal 5 and signal B circuit terminal 6. Verify the scan tool SWPS Signal A and SWPS Signal B parameter is greater than 4.75-volts.

• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

6. If all circuits test normal, test or replace the steering wheel position sensor.



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Control Module References for EBCM replacement, setup, and programming