C047A

DTC C047A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C047A

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Electric Steering Motor Position Sensor Circuit Malfunction

Circuit/System Description

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

Conditions for Running the DTC

The vehicle is ON or in SERVICE MODE.

Conditions for Setting the DTC

The power steering control module 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 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 Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly - Primary

Description and Operation

Power Steering System Description and Operation (Belt Drive EPS) Power Steering System Description and Operation (Belt Drive EPS)Power Steering System Description and Operation (Electronic Power Steering) Power Steering System (Electronic Power Steering)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. With a scan tool, verify that DTC C047A is not set.

• If the DTC is set

Refer to Circuit/System Testing below.

• If the DTC is not set

2. All OK. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

Circuit/System Testing

1. With a scan tool perform the Power Steering Control Module Calibration Power Steering Control Module Calibration procedure Steering Angle Sensor Centering and Software Endstop Learning.

2. Verify that DTC C047A does not set.

• If the DTC does set

Replace the K43 Power Steering Control Module.

• If the DTC does not set

3. All OK. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing repair procedures.

* Steering Gear Replacement (L99, LFX, LS3, N41) Steering Gear ReplacementSteering Gear Replacement (LSA, NV9)

* Control Module References Control Module References for power steering control module replacement, programming and setup