VCFRONT_a129 — Pcs eFuse Trip

Full alert identifier: VCFRONT_a129_pcsEFuseTrip

Alert description

The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the power conversion system (PCS), interrupting power supply to the PCS..

Potential impact

The vehicle low voltage electrical system will no longer be supported by the PCS. Features may be limited or unavailable. The vehicle may use loadshedding (switching off nonessential features) to preserve power for essential functions, with at least one other alert present to indicate this condition.

Set condition

VCFRONT detects the eFuse circuit gating low voltage (LV) power feed to the PCS as open (tripped).

Clear condition

VCFRONT no longer detects the eFuse circuit gating low voltage (LV) power feed to the PCS as open (tripped) after a retry or sleep cycle, or the vehicle enters a state where the eFuse is expected to be open (off).

Signals to check

These diagnostic fields are associated with VCFRONT_a129. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Pcs E Fuse Current `VCFRONT_a129_pcsEFuseCurrent`	A
Pcs E Fuse Remaining Retries `VCFRONT_a129_pcsEFuseRemainingRetries`	—
Pcs E Fuse Temp `VCFRONT_a129_pcsEFuseTemp`	degC
Pcs E Fuse Voltage `VCFRONT_a129_pcsEFuseVoltage`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a129.