Pinpoint Test Av: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U0447:00
Normal Operation and Fault Conditions
REFER to: Power Steering - System Operation and Component Description .
Description
- Description
- The serial data gateway module is also known as the GWM.
- 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 GWM 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 GWM sends out "invalid", "fault" or "unknown" instead of the actual sensor data. For a list of the messages sent to the PSCM from the GWM, refer to Network Message Chart in the service information.
Pinpoint Test Applicability
- Pinpoint Test Applicability
- This test applies to PSCMDTC U2100 Initial Configuration not complete 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 U0447 and identify the correct service information for diagnosing the DTC concern.
Diagnostic Aids
- Diagnostic Aids
- DTC U0447:00 indicates a concern with the messages sent from the GWM. The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCMDTC U0447:00.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PSCM U0447:00 | Invalid Data Received From Serial Data Gateway 'A': No Sub Type Information | This DTC is set if the PSCM receives an "fault" or "unknown" message from the GWM instead of valid information. |
Possible Sources
- GWM related sensors and components
- GWM Pinpoint Tests AV: PSCM DTC U0447 Invalid Data Received From Serial Data Gateway "A"