C044A

DTC C044A

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 C044A 71
- Steering System Engine Speed Signal Circuit Invalid Serial Data Received

Circuit/System Description

The PSCM monitors the engine speed validity message from the engine control module (ECM) via the serial data circuit. The PSCM uses this engine speed message, along with the torque sensor and motor position sensor inputs, to determine the desired amount of steering assist.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The PSCM receives an invalid, or no engine speed message from the ECM.

Action Taken When the DTC Sets

* DTC C044A 71 is stored in memory.
* The DIC displays the POWER STEERING warning message.
* Steering assist is set to a default level.

Conditions for Clearing the DTC

* A current DTC will clear when the malfunction is no longer present.
* A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

This DTC is for information only. As an aid to the technician, this DTC indicates that their are no problems in the PSCM. The ECM should be checked for a possible fault.

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 Verification

Verify that no DTCs are set in the ECM.

If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions).