VCBATT_a407 — Dcr Milli Ohms Above Threshold

Full alert identifier: VCBATT_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

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
IBS Temperature `VCBATT_a407_IBSTemperature`	degC
Avg Interval Current `VCBATT_a407_avgIntervalCurrent`	A
Avg Pulse Current `VCBATT_a407_avgPulseCurrent`	A
Dcr Milli Ohms `VCBATT_a407_dcrMilliOhms`	mOhms
Interval Current Variance `VCBATT_a407_intervalCurrentVariance`	A
Pulse Current Variance Shifted `VCBATT_a407_pulseCurrentVarianceShifted`	A
Test Counter `VCBATT_a407_testCounter`	—

Signal	Unit
Dcr 12 V Threshold `VCBATT_a407_dcr12VThreshold`	—
Opportunistic Test `VCBATT_a407_opportunisticTest`	—
Testing Expended `VCBATT_a407_testingExpended`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCBATT_a407.