BMS_a086 — SW FC Contactor Mismatch

Full alert identifier: BMS_a086_SW_FC_Contactor_Mismatch

Alert description

The Battery Management System (BMS) detects a mismatch between actual and commanded fast charge (FC) contactor set state.

Potential impact

DC charging is terminated.

Set condition

High voltage processor (HVP) comms are ok and fast charge contactors were closed and fast charge contactors are now open / opening and BMS_fcContactorRequest has remained closed.

Clear condition

HVP_fcContactorSetState is correct for the current BMS_fcContactorRequest.

Signals to check

These diagnostic fields are associated with BMS_a086. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
Fc Contactor Set Request `BMS_a086_fcContactorSetRequest` 0 SNA 1 CLOSE 2 OPEN 3 OPEN IMMEDIATELY 4 CLOSE NEGATIVE ONLY 5 CLOSE POSITIVE ONLY	—
Fc Contactor Set Request Prev `BMS_a086_fcContactorSetRequestPrev` 0 SNA 1 CLOSE 2 OPEN 3 OPEN IMMEDIATELY 4 CLOSE NEGATIVE ONLY 5 CLOSE POSITIVE ONLY	—
Fc Contactor Set State `BMS_a086_fcContactorSetState`	—
Fc Contactor Set State Prev `BMS_a086_fcContactorSetStatePrev`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of BMS_a086.