EPASTS_a121_mcusscMbistEccErr

This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when the memory Built-In-SelfTest failed, errors in the critical memory units. MCU failure.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

EPAS reset. If reset more than 6 then EPAS fallback to bootloader.

Description

This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when the memory Built-In-SelfTest failed, errors in the critical memory units. MCU failure.

Cause

EPAS memory BIST found any errors in critical memory units (CPU0, CPU1, DMA).

Clear condition

EPAS HW failure. EPAS power cycle N times and if persists, the gear needs to be changed.

Models

Model Y, Model Y 2025+

Visibility

service-fix

Want to track your firmware alerts, trips and more?

Sign up for Tessie. Try it free for 14 days. Happiness guaranteed.