Pinpoint Test Aw: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U045A:00
WARNING: This page is about a different car, the 2021 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Power Steering Controls for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Power Steering - System Operation and Component Description .
Description
- The PSCM monitors the HS-CAN when the voltage to the PSCM is greater than 10 volts and there are no Diagnostic Trouble Codes (DTCs) present inhibiting PSCM operation.
Pinpoint Test Applicability
- This test applies to PSCM DTC U045A Invalid Data Received from the PAM only. 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 direct the diagnosis to the module and associated circuit sending the faulty or unknown information in the messages.
Diagnostic Aids
- For additional information on the messages sent to the PSCM from the PAM module, refer to the Network Message List in Network Message Chart .
- DTC U045A:00 indicates a concern with the lane information sent from the PAM. The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCM DTC U045A:00.
- The presence of DTC U045A:00 may prevent the active park assist from activating. If the DTC sets during an assist event, the event may be terminated and the assist feature may be 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 an "fault" or "unknown" message from the PAM instead of valid information. |
Possible Sources
- HS-CAN concern
- PAM
Pinpoint Tests AW: PSCM DTC U045A Invalid Data Received From Parking Assist Control Module "A"