HVREX_a120 — External Isolation
Full alert identifier: HVREX_a120_ExternalIsolation
Alert description
The battery management system (BMS) detects that high voltage (HV) isolation is too low while pack contactors are closed.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
Set condition
The BMS has detects that HV isolation is below the warning threshold while contactors are closed.
Clear condition
The BMS has detects that HV isolation is within the acceptable threshold while contactors are closed.
Signals to check
These diagnostic fields are associated with HVREX_a120. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Iso Negative R
HVREX_
|
kOhm |
Iso Positive R
HVREX_
|
kOhm |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of HVREX_a120.