Pinpoint Test Bi: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) C200D Motor Rotation Angle Sensor

Refer to POWER STEERING CONTROLS for schematic and connector information.

Normal Operation and Fault Conditions

Description

Description
The PSCM continually monitors the motor position angle sensor when the ignition is ON and the voltage supply to the PSCM is above 10 volts.

Pinpoint Test Applicability

Pinpoint Test Applicability
This test applies to PSCMDTC C200D Motor Rotation Angle Sensor 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 PSCM C200D:xx is present and provide diagnostics if DTC C200D:xx is currently present and active in the PSCM.

Diagnostic Aids

Diagnostic Aids
During the ignition cycle the DTC initially sets, the PSCM either enters manual mode, reduced assist mode or steering assist is gradually reduced until the PSCM enters manual mode.
During the next ignition cycle after the DTC sets, if the PSCM is not already in manual mode the PSCM removes steering assist and enters manual mode. The module also transmits an invalid steering angle message over the CAN and sends a message to the IPC to display the
STEERING ASSIST FAULT SERVICE REQUIRED in the message center.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PSCM C200D:62	Motor Rotation Angle Sensor: Signal Compare Failure	If the signal from the sensor is missing or does not match other sensor input, DTC C200D:49 is set.
PSCM C200D:49	Motor Rotation Angle Sensor: Internal Electronic Failure	If the motor rotation angle sensor signal does not match other sensor input, DTC C200D:62 is set.

Possible Sources