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 position sensor sine wave frequency signals. The sine wave voltage signals of the position 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 ()
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Steering System Description and Operation (without HP5) (Description and Operation)Power Steering System Description and Operation (with HP5) (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 X4 harness connector at the PSCM.
2. Ignition OFF, test for 10-200 ohm of resistance between the signal circuit terminal 1 and the signal circuit terminal 3.

• If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the power steering motor.

3. Ignition OFF, test for 3K-10Kohm of resistance between the signal circuit terminal 6 and the signal circuit terminal 3.

• If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the power steering motor.

4. Ignition OFF, test for 6K-20K ohm of resistance between the signal circuit terminal 5 and the signal circuit terminal 3.

• If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the power steering motor.

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

• If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the power steering motor.

6. If all circuits test normal, 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.
* Power Steering Assist Motor Replacement (Non-Two Mode Hybrid) (Service and Repair)
* Electronic Power Steering Motor Control Module Replacement (Non-Two Mode Hybrid) (Service and Repair)