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 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's input and output shaft sinusoidal voltage signals. As the steering wheel is turned and torsional twist is applied to the steering shaft, the torque sensor's 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
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 Testing
1. Ignition OFF, disconnect the X3 harness connector at the PSCM.
2. Test for 2-20 ohms between the torque sensor exciting circuit terminal 4 and the torque sensor exciting ground circuit terminal 6.
• If not within the specified range, test the appropriate circuits for a short to ground, an open/high resistance, or a short together. If the circuits test normal, replace the steering gear.
3. Test for 100-500 ohms between the torque sensor input shaft side SIN circuit terminal 10 and the torque sensor ground circuit terminal 9.
• If not within the specified range, test the appropriate circuits for an open/high resistance, or a short together. If the circuits test normal, replace the steering gear.
4. Test for 300-1000 ohms between the torque sensor input shaft side COS circuit terminal 11 and the torque sensor ground circuit terminal 9.
• If not within the specified range, test the appropriate circuits for an open/high resistance, or a short together. If the circuits test normal, replace the steering gear.
5. Test for 50-200 ohms between the torque sensor output shaft side SIN circuit terminal 10 and the torque sensor ground circuit terminal 9.
• If not within the specified range, test the appropriate circuits for an open/high resistance, or a short together. If the circuits test normal, replace the steering gear.
6. Test for 200-800 ohms between the torque sensor output shaft side COS circuit terminal 13 and the torque sensor ground circuit terminal 9.
• If not within the specified range, test the appropriate circuits for an open/high resistance, or a short together. If the circuits test normal, replace the steering gear.
7. Test for infinite resistance between the torque sensor exciting ground terminal 6 and torque sensor ground terminal 9.
• If less than the specified value, test the appropriate circuit for a short together. If the circuits test normal, replace the steering gear.
8. Test for greater than 1 Mega ohms between the following circuits listed below and the motor flange.
* torque sensor ground terminal 9
* torque sensor exciting ground terminal 6
• If less than the specified range, test the appropriate circuit for a short to ground. If the circuits test normal, replace the steering gear motor.
9. 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