C0545

DTC C0545

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 C0545 00
- Steering Wheel Torque Input Sensor




Circuit/System Description

The power steering control module (PSCM) continuously monitors the torque sensor's input and output shaft sinusoidal voltage signals. As the steering wheel is turned and torsional twist is applied to the steering column shaft, the torque sensors input and output shaft sinusoidal voltage signals are processed by the PSCM to detect and calculate the steering torque.


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 torque sensor circuits.


Actions Taken When DTC Sets

* DTC C0545 is stored in memory.
* The driver information center (DIC) displays the SERVICE POWER STEERING warning 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
Description and Operation

Power Steering System Description and Operation (with EPS) (Power Steering System Description and Operation (with EPS))Power Steering System Description and Operation (with HPS) (Power Steering System Description and Operation (with HPS))
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 left and right. Verify that DTC C0475 is not set.

If DTC set refer to DTC C0475 (C0475) .



Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X3 at the PSCM.
2. Ignition OFF, test for 2 - 20 ohms between the exciting circuit terminal 4 and the exciting ground circuit terminal 2 of the torque sensor.

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

3. Ignition OFF, test for 100 - 500 ohms between the input SIN circuit terminal 8 and the torque sensor ground circuit terminal 1 of the torque sensor.

• If not within the specified range, test the input SIN and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.

4. Ignition OFF, test for 300 - 1000 ohms between the input COS circuit terminal 7 and the torque sensor ground circuit terminal 1 of the torque sensor.

• If not within the specified range, test the input COS and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.

5. Ignition OFF, test for 50 - 200 ohms between the output SIN circuit terminal 6 and the torque sensor ground circuit terminal 1 of the torque sensor.

• If not within the specified range, test the output SIN and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.

6. Ignition OFF, test for 200 - 800 ohms between the output COS circuit terminal 5 and the torque sensor ground circuit terminal 1 of the torque sensor.

• If not within the specified range, test the output COS and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.

7. Ignition OFF, test for greater than 1.0 Mega-ohms between the exciting ground circuit terminal 2 and the torque sensor ground terminal 1.

• If less than the specified range, test the exciting ground circuit for a short to the torque sensor ground circuit. If circuits test normal, replace the steering column.

8. Ignition OFF, test for greater than 1.0 Mega-ohm of resistance between the torque sensor ground circuit terminal 1 and ground.

• If less than the specified range, test the torque sensor ground circuit for a short to ground. If circuits test normal, replace the steering column.

9. Ignition OFF, test for greater than 1.0 Mega-ohms between the exciting ground circuit terminal 2 and ground.

• If less than the specified range, test the exciting ground circuit for a short to ground. If circuits test normal, replace the steering column.

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



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Steering Column Replacement (with EPS) (Steering Column Replacement (with EPS))Steering Column Replacement (with HPS) (Steering Column Replacement (with HPS))
* Control Module References for PSCM replacement, setup, and programming