Service Information

Volt

DTC C044A

•	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 C044A 71: Steering System Engine Speed Signal Circuit Invalid Data

The power steering control module receives the engine speed signal from the engine control module.

The ignition is ON.

The power steering control module detects a invalid engine speed signal on the CAN Bus.

•	DTC C044A is stored in memory.

•	The driver information centre displays the SERVICE POWER STEERING warning message.

•	A current DTC will clear on the next malfunction-free ignition cycle.

•	A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Power Steering System Description and Operation : Electronic Power Steering

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Control Module References for scan tool information

Verify that DTC C044A 71 is not set.

⇒	If the DTC is set, replace the K43 Power Steering Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Steering Gear Replacement

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