C0461

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 Descriptors

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.

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 volt for 1.6 seconds.
* The angle change in Phase A or Phase B is greater than 36 degrees between 2 consecutive signal samples.

C0461

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

Action Taken When the DTC Sets

If equipped, the following actions will occur:

* The EBCM disables 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

* A current DTC will clear when the malfunction is no longer present.
* A history DTC will clear after 100 consecutive malfunction-free ignition cycles or when the scan tool Clear DTCs function is used.

Diagnostic Aids

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:

* Testing for Electrical Intermittents
* Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
* Wiring Repairs
* Connector Repairs

Test Description

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the circuitry in the high voltage range.
4. This step tests the circuitry in the low voltage range.
5. This step tests the low reference circuit of the steering wheel position sensor.

Step 1 - Step 8:

Step 9 - Step 14: