C0545

DTC C0545 (without HP5)

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 C0545 00
- Steering Wheel Torque Input Sensor

Circuit/System Description

The power steering control module (PSCM) continuously monitors the torque sensor input and output shaft sine wave frequency signals. As the steering wheel is turned and torsional twist is applied to the steering column shaft, the torque sensors input and output shaft sine wave frequency 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 ()
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 harness connector X3 at the PSCM.
2. Ignition OFF, test for 2-20 ohm between the signal circuit terminal 4 and the signal circuit terminal 2.

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

3. Ignition OFF, test for 100-500 ohm between the signal circuit terminal 8 and the signal circuit terminal 1.

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

4. Ignition OFF, test for 300-1000 ohm between the signal circuit terminal 7 and the signal circuit terminal 1.

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

5. Ignition OFF, test for 50-200 ohm between the signal circuit terminal 6 and the signal circuit terminal 1.

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

6. Ignition OFF, test for 200-800 ohm between the signal circuit terminal 5 and the signal circuit terminal 1.

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

7. Ignition OFF, test for greater than 1.0 Mohm between the signal circuit terminal 2 and the signal circuit terminal 1.

• If less than the specified range, test the signal circuits for a short to ground or an open/high resistance. If circuits test normal, replace the steering column.

8. Ignition OFF, test for greater than 1.0 Mohm of resistance between the signal circuit terminal 1 and ground.

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

9. Ignition OFF, test for greater than 1.0 Mohm between the signal circuit terminal 2 and ground.

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

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

Repair Instructions

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

* Steering Column Replacement (Steering Column Replacement)
* Control Module References (Programming and Relearning) for PSCM replacement, setup, and programming