C0565

DTC C0565

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 C0565 5A
- Vehicle Identification Number Not Plausible

Circuit/System Description

The power steering control module (PSCM) compares the VIN stored in EEPROM with the VIN provided via the serial data circuit by the body control module (BCM). If the PSCM is replaced, the VIN needs to be copied from the existing PSCM over to the new PSCM using the SPS EPS Setup Procedure.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The PSCM compares the VIN stored in EEPROM with the VIN provided over GMLAN serial data by the BCM.

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 40 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

Verify that DTC C0565 5A is not set.

If the DTC is set, replace the steering gear. If the DTC resets, replace the PSCM.

Repair Instructions

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

* Steering Gear Replacement (HP5) (Service and Repair)Steering Gear Replacement (NJ1 or HP7) (Service and Repair)Steering Gear Replacement (NVH) (Service and Repair)
* Control Module References (Programming and Relearning) for PSCM replacement, setup, and programming