GTW_w318 — Mcu Uv Prot Activated

Full alert identifier: GTW_w318_mcuUvProtActivated

Alert description

The vehicle Gateway (GTW) hardware detects an undervoltage and disables the Graphics Processing Unit (GPU) in order to allow the other low voltage (LV) systems to continue operating.

Potential impact

The GPU is turned off to allow the vehicle to continue driving.

Set condition

The vehicle GTW detects an undervoltage condition when the vehicle was being driven.

Clear condition

The vehicle is no longer being driven.

Signals to check

These diagnostic fields are associated with GTW_w318. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Supply Voltage `GTW_a318_supplyVoltage`	mV

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of GTW_w318.

GTW_w357 — Mcu Uv Prot Cant Unlatch GTW_w357_mcuUvProtCantUnlatch The vehicle Gateway (GTW) unsuccessfully attempted to disengage the undervoltage protection loadshed circuit. May indicate the Media Control Unit (MCU) was engaging the loadshed circuit when GTW was trying to disengage it.
GTW_w320 — Mcu Uv Prot Unexpected Disarm GTW_w320_mcuUvProtUnexpectedDisarm The vehicle Gateway (GTW) hardware detects that the undervoltage protection unexpectedly disarmed. The hardware may not be able to provide the undervoltage protection when it is needed.
GTW_w321 — Mcu Uv Prot Failed To Disarm GTW_w321_mcuUvProtFailedToDisarm The vehicle Gateway (GTW) hardware detects that the undervoltage protection failed to disarm. The Media Control Unit (MCU) might still be arming the undervoltage protection.
GTW_w319 — Mcu Uv Prot Failed To Arm GTW_w319_mcuUvProtFailedToArm The vehicle Gateway (GTW) hardware detects that the undervoltage protection failed to arm. The hardware will not be able to provide the undervoltage protection when it is needed.
GTW_w324 — Mcu Uv Prot DGPU Stuck Off GTW_w324_mcuUvProtDGPUStuckOff The vehicle Gateway (GTW) hardware detects that the Graphics Processing Unit (dGPU) could not be turned on during a undervoltage protection self test.

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