C1528

DTC C1528

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 C1528 00
- Motor Speed Invalid Signal Malfunction

Circuit/System Description

The power steering control module (PSCM) monitors the pump motor circuits and sets a code for out of range signals.

Conditions for Running the DTC

Engine Running

Conditions for Setting the DTC

* Sensor signal is out of range.
* Above condition must be fulfilled for at least 0.2 seconds.

Action Taken When the DTC Sets

The system function is not affected.

Conditions for Clearing the DTC

A history DTC will clear after 60 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Power Steering Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Steering System Description and Operation (TRW) (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)

Circuit/System Verification

1. Verify that DTC C1528 is set.

• If the DTC is set, reprogram the PSCM. If the DTC resets, replace the PSCM.

Repair Instructions

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

Important: For any module replacement a set procedure needs to be followed. A "Reset" needs to be performed from the PROGRAMMING menu of the current system with the scan tool BEFORE replacing the module.


* Power Steering Pump Replacement
* Power Steering Pump Wiring Harness Replacement