VCBATT_a404_resistanceEstimationHardFailure

The low voltage (LV) battery internal resistance is too high, based on measured voltage being below the acceptable threshold during a resistance estimation test. Indicates LV battery replacement is necessary.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

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

Description

The low voltage (LV) battery internal resistance is too high, based on measured voltage being below the acceptable threshold during a resistance estimation test. Indicates LV battery replacement is necessary.

Cause

The LV battery voltage dropped below the lower limit during a resistance estimation test.

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.

Models

Model S 2021+, Model X 2021+

Visibility

service

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