VCLEFT_a204 — Undervoltage Loadshed Triggered

Full alert identifier: VCLEFT_a204_undervoltageLoadshedTriggered

Alert description

Undervoltage loadshed protection has tripped on the Left Vehicle Controller (VCLEFT). Low Voltage (LV) bridge is expected to be open until the protection is cleared.

Potential impact

LV bridge is open. Impacted load(s) unavailable in Drive.

Set condition

48V bus is reported undervoltage on VCLEFT while the vehicle is in Drive.

Clear condition

Undervoltage loadshed protection resets when the vehicle is parked and the 48V bus voltage exceeds 28V.

Signals to check

These diagnostic fields are associated with VCLEFT_a204. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Vbus Voltage `VCLEFT_a204_vbusVoltage`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a204.

VCLEFT_a205 — Overvoltage Shutdown Triggered VCLEFT_a205_overvoltageShutdownTriggered Overvoltage protection has tripped on the Left Vehicle Controller (VCLEFT). Low Voltage (LV) bridge is expected to be open until the protection is cleared.
VCLEFT_a414 — Undervoltage Self Test Failure VCLEFT_a414_undervoltageSelfTestFailure The Left Domain Undervoltage self-test did not pass, as a condition affecting a load on the Left Domain was detected during the self-test.
VCLEFT_a415 — Undervoltage Self Test Stuck Off VCLEFT_a415_undervoltageSelfTestStuckOff One or more loads did not turn on during the Left Domain Undervoltage self-test. Those loads will be inhibited from use while in the drive vehicle power state.
VCLEFT_a484 — Undervoltage Self Test Stuck On VCLEFT_a484_undervoltageSelfTestStuckOn One or more loads did not turn off during the Left Domain Undervoltage self-test.
VCLEFT_a483 — Undervoltage Self Test Stuck On Debug VCLEFT_a483_undervoltageSelfTestStuckOnDebug The Left Domain Undervoltage self-test did not pass, as a condition affecting a load on the Left Domain was detected during the self-test.

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