EPASTS family
EPASTS_a085_amGduSwitchOffTestByMcu
Not Available
What does the EPASTS_a085_amGduSwitchOffTestByMcu alert mean?
This alert is reported by the ActuatorManager_R12 (AM) component when there is a GDU or GDU-MCU connection problem. This diagnostic checks if the microcontroller is able to switch off the GDU.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS Gate Driver switch-off test by MCU fails. GDU is unable to switch off the GDU.
When it clears
EPAS HW failure. EPAS power cycle N times and if persists, the gear needs to be changed.
Potential impact
EPAS full loss of assist.
Affected models
Model Y
Model Y 2025+
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