VCLEFT_a401 — Dead LV Minimal Ah Discharged

Full alert identifier: VCLEFT_a401_deadLVMinimalAhDischarged

Alert description

The vehicle controller has determined the low voltage (LV) battery is no longer functional, as it has reached a low measured voltage with minimal Amp hours discharged.

Potential impact

The LV battery may be unable to support the vehicle's electrical systems, or to successfully precharge the high voltage (HV) bus.

Set condition

The vehicle controller detects the LV battery has reached a low voltage with minimal Amp hours discharged. Alert log signal data should provide more information, including the load current, battery temperature, and voltage dip measured.

Clear condition

The vehicle controller loses all electrical power from the LV battery and power conversion system (PCS), as would happen during LV battery replacement.

Signals to check

These diagnostic fields are associated with VCLEFT_a401. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
IBS Amp Hours `VCLEFT_a401_IBSAmpHours`	Ah
IBS Current `VCLEFT_a401_IBSCurrent`	A
IBS Voltage `VCLEFT_a401_IBSVoltage`	V
LV Battery Temp `VCLEFT_a401_LVBatteryTemp` 127 SNA	degC

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a401.