• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Steering Wheel Position Sensor 5 Volt Reference Voltage | C0292 | C0292 | C0292 | -- |
Low Reference | C0710 00 | C0710 00 | -- | -- |
Steering Wheel Position Signal A | C0710 00 | C0710 00 | -- | -- |
Steering Wheel Position Signa B | C0710 00 | C0710 00 | -- | -- |
The steering wheel position sensor 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.
• | The ignition is ON. |
• | Ignition voltage is greater than 8 volts. |
• | 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. |
• | 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 STABILITRAK message. |
• | The antilock brake system (ABS) remains functional. |
• | The vehicle dynamics caution (VDC) indicator turns ON. |
• | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
• | If DTC C0292 is set, diagnose that DTC first. |
• | If the steering wheel position sensor is disconnected, DTCs will set and the EBCM will not provide 5-volt reference. |
• | A poor ground connection for the EBCM may cause this DTC to set. |
Antilock Brake System Schematics
Antilock Brake System Connector End Views
Scan Tool Data List for EBCM
⇒ | If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM. |
⇒ | If all circuits test normal, replace the SWPS. |
⇒ | If the DTC sets again after replacing the SWPS, replace the EBCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup, and programming |