VCLEFT_a510 — LV Battery Recovery Timeout
Full alert identifier: VCLEFT_a510_LVBatteryRecoveryTimeout
Alert description
A low voltage (LV) battery recovery attempt has timed out and has been aborted, and the internal protection transistor (MOSFET) has been opened. May occur because an external power supply is connected to the LV battery, or due to a high impedance connection between the power conversion system (PCS) and LV battery. The low voltage battery management system (LVBMS) reports a FAULT state.
Potential impact
The high voltage (HV) system will remain energized to continue supplying electrical power to the vehicle while the LV battery is unavailable. This may result in greater range loss than expected, increased HV system energy consumption when the vehicle is idle, and prevent the vehicle from sleeping. The vehicle will be unable to drive while this alert persists.
Set condition
The LVBMS reports an LV battery recovery attempt has timed out and has been aborted because 50 seconds have passed without the LVBMS detecting adequate current flow to the LV battery across the internal protection transistor (MOSFET).
Clear condition
Will clear on next LV battery recovery attempt. To trigger another recovery attempt: disconnect then reconnect the LV battery, run the LV battery recovery ODIN routine, or cycle vehicle LV power. Be sure to remove / disconnect any external power supply before attempting to recover the LV battery.
Signals to check
These diagnostic fields are associated with VCLEFT_a510. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Frunk Open
VCLEFT_
|
— |
Pack Voltage
VCLEFT_
|
V |
Service Mode
VCLEFT_
|
— |
Sum Cell Voltage
VCLEFT_
|
V |
Target PCS Voltage
VCLEFT_
|
V |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a510.