VCLEFT_a221 — Reverse Battery Fault
Full alert identifier: VCLEFT_a221_reverseBatteryFault
Alert description
The reverse battery protection transistor is not in its nominal state / functioning as expected. This occurs when an abnormally high amount of current is detected flowing from the low voltage (LV) battery vehicle controller to the LV battery.
Potential impact
The low voltage (LV) electrical system for the vehicle could become unsupported and shut down if power conversion system (PCS) support is also lost
Set condition
The low voltage (LV) battery vehicle controller has detected an issue with the reverse battery protection transistor.
Clear condition
The low voltage (LV) battery vehicle controller no longer detects an issue with the reverse battery protection transistor.
Signals to check
These diagnostic fields are associated with VCLEFT_a221. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
IBS Current
VCLEFT_
|
A |
PCS Current
VCLEFT_
|
A |
Frunk Open
VCLEFT_
|
— |
Service Mode
VCLEFT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a221.