VCBATT_a528 — LV Battery Comms Discnctd
Full alert identifier: VCBATT_a528_LVBatteryCommsDiscnctd
Message shown in the car
Low voltage battery disconnected Reconnect low voltage battery or schedule service
Alert description
The low voltage (LV) battery is not communicating as expected, indicating a potential disconnection with the vehicle controller.
Potential impact
Loss of low voltage (LV) battery communication with vehicle controller, so the vehicle electrical system may only be supported via the power conversion system (PCS).
Set condition
Electronic connector position assurance (ECPA) state is signal not available (SNA), or the intelligent battery sensor (IBS) is not functioning as expected and the low voltage battery management system (LVBMS) is not communicating (MIA).
Clear condition
LV battery communication with vehicle controller is restored.
Signals to check
These diagnostic fields are associated with VCBATT_a528. Check the alert's Payload in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
ECPA Frame Timeout
VCBATT_
|
— |
ECPA State SNA
VCBATT_
|
— |
Current Sense Faulted
VCBATT_
|
— |
Frunk Open
VCBATT_
|
— |
Service Mode
VCBATT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCBATT_a528.