VCBATT1_a132 — iBooster eFuse Trip

Full alert identifier: VCBATT1_a132_iBoosterEFuseTrip

Alert description

The battery vehicle controller (VCBATT) 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

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

Clear condition

VCBATT 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

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
I Booster Current `VCBATT1_a132_iBoosterCurrent`	A
I Booster E Fuse Temp `VCBATT1_a132_iBoosterEFuseTemp`	degC
I Booster Voltage `VCBATT1_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 VCBATT1_a132.