Pinpoint Test AU: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U0429:00

Normal Operation and Fault Conditions

Description

Description
The PSCM monitors the CAN messages when the ignition has been on for more than 5 seconds, the voltage to the PSCM is greater than 9 volts and there are no Diagnostic Trouble Codes (DTCs) present inhibiting PSCM operation.
The SCCM uses input from several sensors and components to gather vehicle data, then sends this data to the PSCM. If the data is corrupted or invalid, the SCCM sends out "invalid", "fault" or "unknown" instead of the actual sensor data. For a list of the messages sent to the PSCM from the SCCM, refer to Network Message Chart in the service information.

Pinpoint Test Applicability

Pinpoint Test Applicability
This test applies to PSCMDTC U0429 Invalid Data Received from the Steering Column Control Module only. It does not apply to any other module except the PSCM.

DTC Diagnostic Strategy

DTC Diagnostic Strategy
If the module DTC list results in a large number of Diagnostic Trouble Codes (DTCs), diagnose all module hard faults first (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (lost communication or invalid data). If voltage concern Diagnostic Trouble Codes (DTCs) are present, diagnose those after any module hard faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historic Diagnostic Trouble Codes (DTCs).

Pinpoint Test Purpose

Pinpoint Test Purpose
To verify the presence of DTC U0429 and identify the correct service information for diagnosing the DTC concern.

Diagnostic Aids

Diagnostic Aids
DTC U0429:00 indicates a concern with the operating mode message, the torque steer compensation message or the brake pull reduction message sent from the SCCM.
The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCMDTC U0429:00.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PSCM U0429:00	Invalid Data Received From Steering Column Control Module: No Sub Type Information	This DTC sets if the PSCM receives an invalid or unknown message from the SCCM instead of the actual steering angle data.

Possible Sources