Pinpoint Test Cr: PSCM DTC U202B In-Use Application Signing Key

Normal Operation and Fault Conditions

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

This test applies to PSCM DTC U202B In-Use Application Signing Key only. It 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 PSCM DTC 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

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