VCBATT_a559 — LV Battery Low SOC
Full alert identifier: VCBATT_a559_LVBatteryLowSOC
Alert description
The low voltage battery management system (LVBMS) reports the low voltage (LV) battery has a reduced state of charge (SOC), which may lead to the LVBMS opening the LV battery internal protection transistor (MOSFET).
Potential impact
The LV battery may be unable to support vehicle electrical systems.
Set condition
The LVBMS detects the LV battery SOC is below 15% for 5 seconds.
Clear condition
The LVBMS detects the LV battery SOC is above 20%.
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 |
|---|---|
Pack Current
VCBATT_
|
A |
Soc
VCBATT_
|
% |
| Signal | Unit |
|---|---|
Bms mia
VCBATT_
|
— |
HV Blocking Mismatch
VCBATT_
|
— |
Hv up
VCBATT_
|
— |
Pcs mia
VCBATT_
|
— |
Battery SM State
VCBATT_
|
— |
Bms State
VCBATT_
|
— |
Contactor E Fuse Stable
VCBATT_
|
— |
Crash Detected
VCBATT_
|
— |
Show 10 more fields
| Signal | Unit |
|---|---|
Dcdc LV Support Status
VCBATT_
|
— |
Factory Mode
VCBATT_
|
— |
Frunk Open
VCBATT_
|
— |
Hvc E Fuse Stable
VCBATT_
|
— |
Not Enough Power For Support
VCBATT_
|
— |
Pcs E Fuse Stable
VCBATT_
|
— |
Service Mode
VCBATT_
|
— |
Transport Mode
VCBATT_
|
— |
Vcright E Fuse Stable
VCBATT_
|
— |
Vehicle Power State
VCBATT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCBATT_a559.