VCFRONT_a142 — Exv Motor Fault

Full alert identifier: VCFRONT_a142_exvMotorFault

Alert description

The front vehicle controller (VCFRONT) detects the chiller electronic expansion valve (EXV) motor driver is experiencing an electrical condition (short or disconnect).

Potential impact

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

Set condition

The chiller EXV motor driver is experiencing an electrical condition (short or disconnect).

Clear condition

The chiller EXV motor driver no longer experiences an electrical condition (short or disconnect).

Signals to check

These diagnostic fields are associated with VCFRONT_a142. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
Charge Pump Undervoltage `VCFRONT_a142_chargePumpUndervoltage`	—
Driver Has Comm Error `VCFRONT_a142_driverHasCommError`	—
Driver State `VCFRONT_a142_driverState`	—
Driver Therm Shutdown `VCFRONT_a142_driverThermShutdown`	—
Driver Therm Warn `VCFRONT_a142_driverThermWarn`	—
Is Coil Open X `VCFRONT_a142_isCoilOpenX`	—
Is Coil Open Y `VCFRONT_a142_isCoilOpenY`	—
Is Coil Short XN Gnd `VCFRONT_a142_isCoilShortXNGnd`	—

Show 8 more fields

Signal	Unit
Is Coil Short XN Vbb `VCFRONT_a142_isCoilShortXNVbb`	—
Is Coil Short XP Gnd `VCFRONT_a142_isCoilShortXPGnd`	—
Is Coil Short XP Vbb `VCFRONT_a142_isCoilShortXPVbb`	—
Is Coil Short YN Gnd `VCFRONT_a142_isCoilShortYNGnd`	—
Is Coil Short YN Vbb `VCFRONT_a142_isCoilShortYNVbb`	—
Is Coil Short YP Gnd `VCFRONT_a142_isCoilShortYPGnd`	—
Is Coil Short YP Vbb `VCFRONT_a142_isCoilShortYPVbb`	—
Undervoltage `VCFRONT_a142_undervoltage`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a142.