Model Y

EPASTS_a005 — Scp Unknown Reset Source

Full alert identifier: EPASTS_a005_scpUnknownResetSource

Alert description

This alert is reported by the StartupCauseProvider_R12 (SCP) component when all received causes are unknown startup causes and the determined startup cause is UNKNOWN.

Potential impact

EPAS full loss of assist. EPAS is unable to establish why the SW has been started.

Set condition

EPAS detected unknown startup cause at startup.

Clear condition

Perform EPAS Software update.

Signals to check

These diagnostic fields are associated with EPASTS_a005. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
Debug Info `EPASTS_a005_debugInfo`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of EPASTS_a005.

EPASTS_a169 — Scp Safety Reset EPASTS_a169_scpSafetyReset This alert is reported by the StartupCauseProvider_R12 (SCP) component if it determines that the startup cause is a safety reset.
EPASTS_a030 — Rsth Clock Reset EPASTS_a030_rsthClockReset This alert is reported by the HwResetHandler_TC3x (RSTH) component when the clock frequency is out of range or clock system failure.
EPASTS_a004 — Scp Input Mia EPASTS_a004_scpInputMia This alert is reported by the StartupCauseProvider_R12 (SCP) component in case, at least one of the possible reset causes is not available after the provision time has elapsed.
EPASTS_a176 — Exch Cpu1 Exception Reset EPASTS_a176_exchCpu1ExceptionReset This alert is reported in case a reset is caused by exception on core1.
EPASTS_a185 — Sbcscp QA Watchdog Reset EPASTS_a185_sbcscpQAWatchdogReset This alert is reported by the SBCStartupCauseProvider_A8140x (SBCSCP) component if external question-answer watchdog (Q&A) fails. MCU SM requires it, against systematic SW faults, and random HW faults of the time base.

Browse all EPASTS alert codes