For 1990-2009 cars only
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 C047A 00: Electric Steering Motor Position Sensor CircuitCircuit/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
Connector End View Reference
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References 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 after completing the diagnostic procedure.
Control Module References for PSCM replacement, setup, and programming
