Pinpoint Test Aw: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U045A:00 Invalid Data Received From The Parking Assist Control Module

Normal Operation and Fault Conditions

Description
The PAM 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 PAM sends out "invalid", "fault" or "unknown" instead of the actual sensor data.
For additional information on the messages sent to the PSCM from the PAM module, REFER to: Power Steering - System Operation and Component Description .

Pinpoint Test Applicability
This test applies to PSCMDTC U045A Invalid Data Received from the PAMonly. It does not apply to any other module except the PSCM.

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
To verify the presence of DTC U045A and identify the correct Service Information for diagnosing the DTC or concern

Diagnostic Aids
DTC U045A:00 indicates a concern with the PAM. The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCMDTC U045A:00.
The presence of DTC U045A:00 prevents the active park assist system (if equipped) from activating. If set during an active park assist event, the event is terminated and the active park assist system is deactivated.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PSCM U045A:00	Invalid Data Received From Parking Assist Control Module "A": No Sub Type Information	This DTC is set if the PSCM receives invalid data from the PAM instead of valid sensor information. The data is likely invalid due to PAM internal errors, damaged or inoperative sensors or components the PAM uses to gather vehicle data. The invalid data DTC is not set due to the PSCM, PSCM wiring or connectors.

Possible Sources