PSCM

DTC C0899 (PSCM)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0899 03
- Device Voltage Low

Diagnostic Fault Information






Circuit/System Description

The power steering control module (PSCM) has a discrete battery positive voltage supply circuit. The PSCM monitors the voltage level on this circuit to ensure the power steering system has adequate voltage levels to perform the system functions.

Conditions for Running the DTC

Ignition is ON.

Conditions for Setting the DTC

Power steering system voltage is less than 9 volts for at least 1 second.

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

* The condition for the DTC is no longer present.
* The PSCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive ignition cycles.

Circuit/System Testing

1. Measure and record the voltage at the battery terminals. Observe the Battery Voltage Signal parameter. Verify that battery terminal voltage and battery voltage signal readings do not differ more than 1 volt.

• If more than 1 volt, test the battery positive voltage and ground circuits of the PSCM for an open/high resistance or replace the PSCM.

2. Go to Charging System Test. Charging System Test

Repair Instructions

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

Control Module References for PSCM replacement, setup and programming