C0460

DTC C0460 or C0461

Circuit Description

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.

DTC Descriptor

This diagnostic procedure supports the following DTCs:

* DTC C0460 Steering Position Sensor
* DTC C0461 Steering Position Sensor Range/Performance

Conditions for Running the DTC

* The ignition is ON.
* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

C0460

One of the following conditions exists:

* Both Phase A and Phase B are greater than 4.9 volts or less than 0.2 volts for 1.6 seconds.
* The changes in Phase A or Phase B is greater than 36 degrees between consecutive scans of the signal.

C0461

The difference in the phase angle between Phase A and Phase B is greater than 16 degrees continuously for 0.25 seconds.

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 ABS remains functional.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* 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

* Check the vehicle for proper alignment. 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.

Test Description

The numbers below refer to the step numbers on the diagnostic table.
2. Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
3. This step tests for the proper operation of the steering wheel position signal A circuit in the low voltage range.
4. This step tests for the proper operation of the steering wheel position signal B circuit in the low voltage range.
5. This step tests for the proper operation of the steering wheel position signal A circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
6. This step tests for the proper operation of the steering wheel position signal B circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
7. This step tests for a short to voltage in the 5-volt reference circuit.
8. This step tests for a high resistance or an open in the low reference circuit.

Step 1 - Step 9:

Step 10 - Step 20: