VCLEFT_a598 — LVBMB eFuse Self Test Failed

Full alert identifier: VCLEFT_a598_LVBMBeFuseSelfTestFailed

Alert description

The vehicle controller detects the low voltage (LV) battery internal protection transistor (MOSFET) self test has failed, indicating one or more conditions affecting MOSFET functionality.

Potential impact

LV battery internal protection transistor (MOSFET) functionality is not confirmed. The LV battery may be unable to support vehicle electrical systems or to recharge via the power conversion system (PCS).

Set condition

Any part of the LV battery internal protection transistor (MOSFET) self test reports a failure. Alert log signal data should provide more information.

Clear condition

The LV battery internal protection transistor (MOSFET) self test passes. After a failed MOSFET self test, this typically requires LV battery replacement.

Signals to check

These diagnostic fields are associated with VCLEFT_a598. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
IBS Current `VCLEFT_a598_IBSCurrent`	A
LVBMS Pack Current `VCLEFT_a598_LVBMS_packCurrent`	A
Closed Chg IBS Current Count `VCLEFT_a598_closedChgIBSCurrentCount`	—
Closed Chg Pack Current Count `VCLEFT_a598_closedChgPackCurrentCount`	—
Closed Chg Result `VCLEFT_a598_closedChgResult` 0 INVALID 1 FAILED 2 PASSED	—
Closed D Chg IBS Current Count `VCLEFT_a598_closedDChgIBSCurrentCount`	—
Closed D Chg Pack Current Count `VCLEFT_a598_closedDChgPackCurrentCount`	—
Closed D Chg Result `VCLEFT_a598_closedDChgResult` 0 INVALID 1 FAILED 2 PASSED	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a598.