Diagnostic Instructions
DTC Descriptor
DTC C0710: Steering Position Signal
Diagnostic 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
| --
|
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 voltage is greater than 9.0 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 electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
| • | The ABS and Traction Control indicator turns ON. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
| • | If the steering angle sensor is disconnected, DTCs will set and the EBCM will not provide 5 volt reference. |
| • | 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
Component Connector End Views
Description and Operation
ABS 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 10 ohms between the low reference circuit terminal 24 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. |
- Ignition ON, test for less than 1 volt between the following circuit terminals listed below and ground.
| • | 5-volt reference circuit terminal 25 |
| • | Low reference circuit terminal 24 |
| • | Signal A circuit terminal 39 |
| • | Signal B circuit terminal 10 |
| ⇒ | If greater than the specified range, test the appropriate circuit for a short to voltage. If the circuit tests normal, replace the EBCM. |
- Ignition OFF, test for infinite resistance between the following circuits terminals listed below and ground.
| • | 5-volt reference circuit terminal 25 |
| • | Signal A circuit terminal 39 |
| • | Signal B circuit terminal 10 |
| ⇒ | If less than the specified value, test the appropriate circuit for a short to ground. If the circuit tests normal, replace the EBCM. |
- Disconnect the harness connector at the EBCM.
- Test for less than 1 ohm between the following circuit terminals listed below.
| • | 5-volt reference circuit terminal 25 and 1 |
| • | Signal A circuit terminal 39 and 5 |
| • | Signal B circuit terminal 10 and 6 |
| ⇒ | If greater than the specified range, test the appropriate circuit for an open/high resistance. If the circuit test normal, replace the combination yaw/lateral accelerometer sensor. |
- 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.
