C1508

DTC C1508

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 C1508 00
- Internal Motor Circuit Malfunction




Circuit/System Description

The power steering control module (PSCM) continuously monitors the voltage and current levels being commanded to the power steering pump. The PSCM compares the commanded and feedback current levels to detect malfunctions in the power steering pump.


Conditions for Running the DTC

* Engine running.
* Power steering system voltage is 9-16 volts.
* Steering input is present.



Conditions for Setting the DTC

A short to ground, short to voltage, or an open/high resistance in the power steering pump, or the circuits to the pump.


Action Taken When the DTC Sets

* The driver information center (DIC) displays the POWER STEERING warning message.
* No steering assist is provided.



Conditions for Clearing the DTC

* A current DTC will clear on the next malfunction-free ignition cycle.
* 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) (Power Steering System Description and Operation (TRW))Power Steering System Description and Operation (ZF) (Power Steering System Description and Operation (ZF))
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)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information


Circuit/System Verification

Verify DTC C1508 is not set.

If DTC C1508 is set, replace the power steering pump.



Repair Instructions

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


Power Steering Pump Replacement (TRW) (Service and Repair)Power Steering Pump Replacement (ZF) (Service and Repair)