C0461

DTC C0460 or C0461

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0460
- Steering Position Sensor

DTC C0461
- Steering Position Sensor Range/Performance

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.

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 (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)

Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering wheel speed position sensor.
2. Test for less than 5 ohms between the low reference circuit terminal 2 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.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.

• 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.

4. Verify the scan tool SWPS signal A parameter is less than 0.2 volts.

• If greater than the specified range, test the signal A circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the EBCM.

5. Verify the scan tool SWPS signal B parameter is less than 0.2 volts.
6. If greater than the specified range, test the signal B circuit terminal 6 for a short to voltage. If the circuit tests normal, replace the EBCM.
7. Install a 3A fused jumper wire between the signal A circuit terminal 5 and the 5-volt reference circuit terminal 1. Verify the scan tool SWPS signal parameter is greater than 4.8 volts.

• If less than the specified range, test the signal A circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

8. Install a 3A fused jumper wire between the signal B circuit terminal 6 and the 5-volt reference circuit terminal 1. Verify the scan tool SWPS signal parameter is greater than 4.8 volts.

• If less than the specified range, test the signal B circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

9. If all circuits test normal, test or replace the steering wheel speed position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement (Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming