Power Steering

DTC C0460

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) provide overview of each diagnostic category.



DTC Descriptor
DTC C0460 00
- Steering Position Sensor




Circuit/System Description

The power steering control module (PSCM) continuously monitors the motor rotational sensor sinusoidal voltage signals. The sinusoidal voltage signals of the motor rotational sensor and the angle difference between the steering column output and input shafts detected by the torque sensor are both processed by the PSCM to detect and calculate the steering wheel angle.


Conditions for Running the DTC

The ignition is ON.


Conditions for Setting the DTC

The PSCM detects open, short to ground or short between any of the motor rotational sensor circuits.


Actions Taken When DTC Sets

* DTC C0460 00 is stored in memory.
* The driver information center (DIC) displays the SERVICE POWER STEERING message.
* No steering assist.



Conditions for Clearing the DTC

* A current DTC will clear on the next malfunction free ignition cycle.
* A history DTC will clear after 100 consecutive malfunction-free ignition cycles.



Reference Information
Schematic Reference

Power Steering Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Steering System Description and Operation (non-turbo) (Description and Operation)Power Steering System Description and Operation (turbo) ()
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 Verification

Ignition ON, verify that scan tool parameter Steering Wheel Angle is +/- 90 degrees when turning steering wheel +/- 90 degrees.


Circuit/System Testing

1. Ignition OFF, disconnect the X2 harness connector at the PSCM.
2. Ignition OFF, test for 10-200 ohms of resistance between terminal 1 and terminal 3.

• If not within the specified range, test the exiting circuit and the exiting ground circuit for an open/high resistance or a short. If the circuits test normal, replace the electric power steering (EPS) motor.

3. Ignition OFF, test for 3K-10K ohms of resistance between terminal 6 and terminal 3.

• If not within the specified range, test the SIN circuit and the exciting ground circuit for an open/high resistance or a short. If the circuits test normal, replace the EPS motor.

4. Ignition OFF, test for 6K-20K ohms of resistance between terminal 5 and terminal 3.

• If not within the specified range, test the COS circuit and the exciting ground circuit for an open/high resistance or a short. If the circuits test normal, replace the EPS motor.

5. Ignition OFF, test for greater than 1M ohms of resistance between terminal 3 and the motor flange.

• If less than the specified value, test the exciting ground circuit for a short to ground. If the circuit tests normal, replace the EPS motor.

6. If all circuits test normal, test or replace the PSCM.



Repair Instructions

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

* Control Module References (Programming and Relearning) for PSCM replacement, setup, and programming.
* Electronic Power Steering Motor Control Module Replacement (Service and Repair)