C047A

DTC C047A

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 C047A 00
- Electric Steering Motor Position Sensor Circuit

Circuit/System Description

The power steering control module (PSCM) continuously monitors the motor position sensor's voltage signals. The voltage signals of the motor position sensor and the digital torque sensor's index current signal are both processed by the PSCM to detect and calculate the steering wheel angle.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The PSCM detects a short to ground, short to voltage, or an open/high resistance on any of the internal motor position sensor circuits.

Action Taken When the DTC Sets

* No Steering assist.
* The driver information center (DIC) displays the SERVICE POWER STEERING warning message.

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 Verification

Verify that DTC C047A 00 is not set.

If the DTC is set, perform the PSCM Centering Procedure. If DTC resets, replace the PSCM.

Repair Instructions

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

Control Module References (Programming and Relearning) for PSCM replacement, setup, and programming