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 SignalDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Steering Wheel Position Sensor 5 Volt Reference Voltage | C0710 00 | C0710 00 | C0710 00 | -- |
Low Reference | C0710 00 | C0710 00 | C0710 00 | -- |
Steering angle sensor position signal A | C0710 00 | C0710 00 | C0710 00 | -- |
Steering angle sensor position signal B | C0710 00 | C0710 00 | C0710 00 | -- |
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
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Position the steering wheel centered and the wheels facing straight-ahead.
- 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
- Ignition OFF, disconnect the harness connector at the steering wheel position sensor.
- Test for less than 5 ohms between the low reference circuit terminal 2 and ground.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.
- Verify the scan tool SWPS Signal A and Signal B parameter is less than 0 volts.
- 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 all circuits test normal, test or replace the steering wheel position sensor.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM. |
| ⇒ | 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. |
| ⇒ | 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. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming
