VCLEFT_a207 — Exit Drive Low LV Bus Voltage

Full alert identifier: VCLEFT_a207_exitDriveLowLVBusVoltage

Alert description

An issue with the low voltage (LV) electrical system requires the vehicle to come to a stop immediately. The vehicle should enter graceful power-off (GPO) to exit drive, and a separate alert should indicate that condition.

Potential impact

The vehicle will not enter drive. If the vehicle is driving, it will exit drive through graceful power-off (GPO) to come to a stop immediately. A separate alert should be present to indicate the GPO

Set condition

Lead acid: Low voltage (LV) battery voltage below threshold for 3 seconds (3s); transistor gating LV battery connection is open (no current flow); vehicle load shedding is active; or reverse battery transistor issue detected.

Clear condition

Low voltage (LV) battery voltage above threshold; transistor gating LV battery connection is closed; no reverse battery transistor issue detected; vehicle loadshedding is not active.

Signals to check

These diagnostic fields are associated with VCLEFT_a207. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
ECPA State `VCLEFT_a207_ECPAState` 0 OPEN 1 CLOSED 2 INVALID 3 SNA	—
IBS Voltage `VCLEFT_a207_IBSVoltage`	V
LVBMS Current Target Valid `VCLEFT_a207_LVBMSCurrentTargetValid`	—
Lvbmsmia `VCLEFT_a207_LVBMSMIA`	—
LVBMS Voltage `VCLEFT_a207_LVBMSVoltage`	V
LVBMS Voltage Target Valid `VCLEFT_a207_LVBMSVoltageTargetValid`	—
MOS State `VCLEFT_a207_MOSState` 0 OPEN 1 CLOSED 2 INVALID 3 SNA	—
Not Enough Power For Support `VCLEFT_a207_NotEnoughPowerForSupport`	—

Show 13 more fields

Signal	Unit
Pcs mia `VCLEFT_a207_PCS_MIA`	—
A 180 DCDC Not Supporting LV Bus `VCLEFT_a207_a180_DCDCNotSupportingLVBus`	—
Bms State `VCLEFT_a207_bmsState`	—
Exit Drive Warning Timer Expired `VCLEFT_a207_exitDriveWarningTimerExpired`	—
Frunk Open `VCLEFT_a207_frunkOpen`	—
Hv State `VCLEFT_a207_hvState` 0 DOWN 1 COMING UP 2 GOING DOWN 3 UP FOR DRIVE 4 UP FOR CHARGE 5 UP FOR DC CHARGE 6 UP	—
Reverse Battery E Fuse Fault `VCLEFT_a207_reverseBatteryEFuseFault`	—
Service Mode `VCLEFT_a207_serviceMode`	—
Vehicle Load Shed Active `VCLEFT_a207_vehicleLoadShedActive`	—
Vehicle Load Shed Hv Fault Active `VCLEFT_a207_vehicleLoadShedHvFaultActive`	—
Vehicle Load Shed Post Crash Active `VCLEFT_a207_vehicleLoadShedPostCrashActive`	—
Vehicle Load Shed Stage `VCLEFT_a207_vehicleLoadShedStage` 0 IDLE OR UNDEFINED 1 1 2 2 3 3	—
Vehicle Power State `VCLEFT_a207_vehiclePowerState` 0 OFF 1 CONDITIONING 2 ACCESSORY 3 DRIVE	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a207.