C0460

DTC C0460

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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 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
Connector End View Reference

Component Connector End Views
Description and Operation

Power Steering System Description and Operation (HPS) (Power Steering System Description and Operation (HPS))Power Steering System Description and Operation (EPS) (Power Steering System Description and Operation (EPS))
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Verification

Engine running, turn the steering wheel to the left lock and right locks, then center the steering wheel, observe the scan tool Steering Wheel Position parameter, the reading should be 0 +/- 10 degrees.

If not within the specified range, perform the steering position torque sensor calibration, and verify DTC C0460 is not set as current.



Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the PSCM.
2. Ignition OFF, test for 10-200 ohms between the rotational sensor exciting ground circuit terminal 1 and the rotational sensor exciting terminal 3.

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

3. Test for 3K-10K ohms between the rotational sensor exciting ground circuit terminal 1 and the rotational sensor sin circuit terminal 7.

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

4. Test for 6K-20K ohms between the rotational sensor exciting ground terminal 1 and the rotational sensor cos terminal 8.

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

5. Test for greater than 1 Mega ohms between the rotational sensor exciting ground terminal 3 and the motor flange.

• If less than the specified range, test the appropriate circuit for a short to ground. If the circuits test normal, replace the electric power steering (EPS) motor.

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



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Control Module References