EPASTS_a017_stmdStmPlausibilityCheckErr

This alert is reported by the STMDriver_TC3x (STMD) component when the System timer (STM) plausibility check fails due to an intolerable time difference between the DMA and STM timestamps.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

EPAS full loss of assist.

Description

This alert is reported by the STMDriver_TC3x (STMD) component when the System timer (STM) plausibility check fails due to an intolerable time difference between the DMA and STM timestamps.

Cause

EPAS microcontroller detected out of sync timers (system timer vs DMA) at startup.

Clear condition

Perform EPAS ECU power cycle.

Models

Model Y, Model Y 2025+

Visibility

service-fix

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