VCLEFT_a548 — HV Fault Load Shed

Full alert identifier: VCLEFT_a548_HVFaultLoadShed

Alert description

The low voltage (LV) battery is discharging, even though high voltage (HV) system support has been requested. Vehicle loadshedding will occur, and a separate alert will be present to indicate that condition.

Potential impact

Vehicle loadshedding is triggered, and a separate alert will be present to indicate that condition and its impacts.

Set condition

LV battery is being discharged, even though the HV system should be supporting both the LV battery and the LV bus.

Clear condition

LV battery becomes supported again by the HV system.

Signals to check

These diagnostic fields are associated with VCLEFT_a548. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Bms mia `VCLEFT_a548_BMS_MIA`	—
DI Gear `VCLEFT_a548_DI_gear` 0 INVALID 1 P 2 R 3 N 4 D 7 SNA	—
HV Blocking Mismatch `VCLEFT_a548_HVBlockingMismatch`	—
HV Not Confirmed Up Trigger `VCLEFT_a548_HVNotConfirmedUpTrigger`	—
Lvbmssoc `VCLEFT_a548_LVBMSSOC`	%
LV Battery Cannot Support Vehicle `VCLEFT_a548_LVBatteryCannotSupportVehicle`	—
PCSMIA Trigger `VCLEFT_a548_PCSMIATrigger`	—
PCS Not Meeting Target Trigger `VCLEFT_a548_PCSNotMeetingTargetTrigger`	—

Show 12 more fields

Signal	Unit
PCS Saturated Trigger `VCLEFT_a548_PCSSaturatedTrigger`	—
PCS Target Voltage `VCLEFT_a548_PCSTargetVoltage`	V
Pcs mia `VCLEFT_a548_PCS_MIA`	—
Amp Hour Bucket Count `VCLEFT_a548_ampHourBucketCount`	Ah
Amp Hour Bucket Filled `VCLEFT_a548_ampHourBucketFilled`	—
Backstop Bucket Count `VCLEFT_a548_backstopBucketCount`	Ah
Backstop Hit `VCLEFT_a548_backstopHit`	—
Frunk Open `VCLEFT_a548_frunkOpen`	—
Hv State `VCLEFT_a548_hvState` 0 DOWN 1 COMING UP 2 GOING DOWN 3 UP FOR DRIVE 4 UP FOR CHARGE 5 UP FOR DC CHARGE 6 UP	—
Not Enough Power For Support `VCLEFT_a548_notEnoughPowerForSupport`	—
Service Mode `VCLEFT_a548_serviceMode`	—
Vehicle Power State `VCLEFT_a548_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_a548.