VCFRONT_a132 — iBooster eFuse Trip

Full alert identifier: VCFRONT_a132_iBoosterEFuseTrip

Alert description

The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the electromechanical brake booster (iBooster / IBST) controller, interrupting power supply to the iBooster (IBST).

Potential impact

Brake assist functionality may be limited.

Set condition

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

Clear condition

VCFRONT no longer detects the eFuse circuit gating low voltage (LV) power feed to iBooster 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_a132. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
I Booster Current `VCFRONT_a132_iBoosterCurrent`	A
I Booster E Fuse Temp `VCFRONT_a132_iBoosterEFuseTemp`	degC
I Booster Voltage `VCFRONT_a132_iBoosterVoltage`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a132.