GTW_w300 — Mcu Undervoltage Protection Self Test

Full alert identifier: GTW_w300_mcuUndervoltageProtectionSelfTest

Alert description

The vehicle Gateway (GTW) detects the undervoltage protection self-test on the Media Control Unit (MCU) did not pass successfully. Driving is disabled as the low voltage (LV) systems may not be protected from an undervoltage event.

Potential impact

Vehicle is unable to drive until the MCU provides undervoltage protection to the LV systems.

Set condition

The vehicle GTW detects the undervoltage protection self-test on the MCU did not pass successfully.

Clear condition

The vehicle GTW detects the undervoltage protection self-test on the MCU passes successfully, indicating the MCU is now able to provide undervoltage protection to the LV systems.

Signals to check

These diagnostic fields are associated with GTW_w300. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Mcu Undervoltage Protection Self Test `GTW_a300_mcuUndervoltageProtectionSelfTest` 0 INVALID SNA 1 STALE 2 FAILED 3 PASSED	—
Mcu Uv Prot Self Test Fail Reason `GTW_a300_mcuUvProtSelfTestFailReason` 0 NONE 1 SOC NOT POWERING ON 2 FAILED TO ARM 3 LOADSHED TIMED OUT 4 DGPU OFF TIMED OUT 5 PN UNKNOWN 6 HW CONFIG NOT FOR VEHICLE	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of GTW_w300.