VCLEFT_a407 — Dcr Milli Ohms Above Threshold

Full alert identifier: VCLEFT_a407_dcrMilliOhmsAboveThreshold

Alert description

The low voltage (LV) battery internal resistance is too high, based on a direct current internal resistance (DCR) calculation. Indicates LV battery replacement is necessary.

Potential impact

The LV battery may be unable to support precharge loads / precharge the high voltage (HV) bus, and requires replacement.

Set condition

Direct current internal resistance (DCR) calculation indicates the LV battery internal resistance exceeds expected threshold (normal operating range).

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_a407. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
IBS Temperature `VCLEFT_a407_IBSTemperature`	degC
Avg Interval Current `VCLEFT_a407_avgIntervalCurrent`	A
Avg Pulse Current `VCLEFT_a407_avgPulseCurrent`	A
Dcr 12 V Threshold `VCLEFT_a407_dcr12VThreshold`	—
Dcr Milli Ohms `VCLEFT_a407_dcrMilliOhms`	mOhms
Interval Current Variance `VCLEFT_a407_intervalCurrentVariance`	A
Opportunistic Test `VCLEFT_a407_opportunisticTest`	—
Pulse Current Variance `VCLEFT_a407_pulseCurrentVariance`	A

Show 2 more fields

Signal	Unit
Test Counter `VCLEFT_a407_testCounter`	—
Testing Expended `VCLEFT_a407_testingExpended`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a407.