VCFRONT_a284 — Chiller Exv Fault
Full alert identifier: VCFRONT_a284_chillerExvFault
Alert description
The vehicle controller detects the chiller electronic expansion valve (EXV) motor driver is reporting an electrical condition (short or disconnect).
Potential impact
Cabin climate control system air conditioning and heating may be limited or unavailable. Powertrain performance may be limited.
Set condition
The chiller EXV motor driver is reporting an electrical condition (short or disconnect).
Clear condition
The chiller EXV motor driver no longer reports an electrical condition (short or disconnect).
Signals to check
These diagnostic fields are associated with VCFRONT_a284. Check the alert's Payload in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Charge Pump Undervoltage
VCFRONT_
|
— |
Driver Has Comm Error
VCFRONT_
|
— |
Driver State
VCFRONT_
|
— |
Driver Therm Shutdown
VCFRONT_
|
— |
Driver Therm Warn
VCFRONT_
|
— |
Is Coil Open X
VCFRONT_
|
— |
Is Coil Open Y
VCFRONT_
|
— |
Is Coil Short XN Gnd
VCFRONT_
|
— |
Show 8 more fields
| Signal | Unit |
|---|---|
Is Coil Short XN Vbb
VCFRONT_
|
— |
Is Coil Short XP Gnd
VCFRONT_
|
— |
Is Coil Short XP Vbb
VCFRONT_
|
— |
Is Coil Short YN Gnd
VCFRONT_
|
— |
Is Coil Short YN Vbb
VCFRONT_
|
— |
Is Coil Short YP Gnd
VCFRONT_
|
— |
Is Coil Short YP Vbb
VCFRONT_
|
— |
Undervoltage
VCFRONT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a284.