VCFRONT_a477 — LV Battery Unrecoverable By Vehicle
Full alert identifier: VCFRONT_a477_LVBatteryUnrecoverableByVehicle
Alert description
The low voltage battery management system (LVBMS) reports the low voltage (LV) battery's internal protection transistor (MOSFET) has opened and it is not recoverable by the vehicle. However, the LV battery may be recoverable using an external LV Lithium Ion Battery charger tool. A separate alert will indicate whether the battery requires replacement.
Potential impact
The LV battery is not recoverable by the vehicle. If recovery via an external charger tool is unsuccessful, replacement will be necessary.
Set condition
The LVBMS reports to the vehicle controller that the LV battery is not recoverable due to any of the following conditions: depleted LV battery state of charge (SoC) due to deep discharge; one or more cell voltage(s) at less than its threshold; the sum of all cell voltages is less than its threshold.
Clear condition
The LV battery is replaced and its internal protection transistor (MOSFET) is detected closed.
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 |
|---|---|
Cell 1 Voltage
VCFRONT_
|
V |
Cell 2 Voltage
VCFRONT_
|
V |
Cell 3 Voltage
VCFRONT_
|
V |
Cell 4 Voltage
VCFRONT_
|
V |
Sum Cell Voltage
VCFRONT_
|
V |
| Signal | Unit |
|---|---|
Deep Discharge Flag
VCFRONT_
|
— |
Frunk Open
VCFRONT_
|
— |
Service Mode
VCFRONT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a477.