VCLEFT_a528 — LV Battery Comms Discnctd
Full alert identifier: VCLEFT_a528_LVBatteryCommsDiscnctd
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 VCLEFT_a528. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
ECPA Frame Timeout
VCLEFT_
|
— |
ECPA State SNA
VCLEFT_
|
— |
Current Sense Faulted
VCLEFT_
|
— |
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_a528.