Pinpoint Test Cr: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U202B In-Use Application Signing Key
WARNING: This page is about a different car, the 2023 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
Description
- Description
- When the battery voltage to the PSCM is greater than 10 volts with the ignition ON and there are no Diagnostic Trouble Codes (DTCs) present, the PSCM runs a self-test of the system software. If an error is detected, a DTC is set and the EPAS enters into a limited operation mode.
Pinpoint Test Applicability
- Pinpoint Test Applicability
- This test applies to PSCMDTC U202B In-Use Application Signing Key only. It 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 PSCMDTC U3001 is present and investigate if the PSCM wiring is the reason for the momentary loss of power. This test verifies the PSCM fuses, PSCM wiring harness power and ground connections are working correctly, as well as the battery and charging system.
DTC Trigger
- DTC Trigger
- This DTC sets when the PSCM internal self tests detect a software internal error. Consult the DTC Index for additional information if needed.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PSCM U202B:00 | In-Use Application Signing Key: No Sub Type Information | One or more files flashed on the PSCM are development files. |
| PSCM U202B:56 | In-Use Application Signing Key: Invalid/Incompatible Configuration | One or more files flashed on the PSCM are development files. |
Possible Sources
- Incorrect files flashed onto PSCM
- PSCM internal failure
- PSCM