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 C044A 71: Steering System Engine Speed Signal Circuit Invalid Serial Data ReceivedCircuit/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
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 no DTCs are set in the ECM.
| ⇒ | If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
