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 Descriptors
DTC C0710 00: Steering Position SignalDTC C0710 5A: Steering Position Signal Circuit Malfunction
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Steering Angle Sensor 5-Volt Reference Circuit | C0710 00 | C0710 00 | C0710 00 | -- |
Steering Angle Sensor Signal Circuit | C0710 00 | C0710 00 | C0710 00 | -- |
Low Reference Circuit | -- | C0710 00 | -- | -- |
Steering Angle Sensor Phase A Circuit | C0710 00 | C0710 00 | C0710 00 | C0710 5A |
Steering Angle Sensor Phase B Circuit | C0710 00 | C0710 00 | C0710 00 | C0710 5A |
Circuit/System Description
The steering angle sensor supplies input circuits to the electronic brake control module (EBCM) from the Phase A and Phase B, the Index Pulse Phase C circuits, and 1 Analog signal circuit for steering wheel angle. The analog signal is used along with the index pulse to calibrate the steering angle sensor (SAS). The SAS position is then determined by Phase A and Phase B signals. The 2 input signals Phase A and Phase B are approximately 90 degrees out of phase. Once calibrated, the EBCM dynamically interprets the relationship between the Phase A and Phase B inputs, and determines 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 9.5 volts. |
Conditions for Setting the DTC
| • | Opens, short to ground, or voltage on Phase A and Phase B or the analog signal circuits. |
| • | The calculated steering angle from the steering angle sensor does not correlate with the steering angle calculated from the yaw rate. |
Action Taken When the DTC Sets
| • | 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 VSES Caution indicator turns ON. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The EBCM automatically 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. |
| • | Inspect the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface. |
| • | Find out from the customer the conditions under which the DTC was set. This information will help to duplicate the failure. |
| • | 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
Antilock Brake System Connector End Views
Description and Operation
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List for EBCM
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the SAS.
- Test for less than 5 ohm 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.
- Test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and the signal circuit terminal 6.
- Ignition OFF, reconnect the SAS.
- Disconnect the EBCM harness connector.
- Test for infinite resistance between the signal circuit pin 4 and ground.
- Disconnect the SAS.
- Reconnect the EBCM harness connector.
- Ignition ON, test voltage of phase A, phase B, and phase C. Verify that the reading is battery positive voltage for each of the three phases.
- If all circuits test normal, replace the steering angle 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 less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the EBCM. |
| ⇒ | If greater than the specified range, test the signal circuit 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. |
| ⇒ | If not the specified value, test the phase A, phase B, and phase C circuits 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 |
