HVREX_a122 — Isolation Degradation
Full alert identifier: HVREX_a122_IsolationDegradation
Alert description
The battery management system (BMS) detects that the high voltage (HV) isolation contactor closed below the warning threshold.
Potential impact
This alert indicates that HV isolation is low, but above the sufficient level for vehicle operation.
Set condition
The BMS detects that the HV isolation was below the warning threshold when pack contactors closed.
Clear condition
The BMS detects that HV isolation is above the warning threshold when pack contactors closed.
Signals to check
These diagnostic fields are associated with HVREX_a122. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Isolation Resistance
HVREX_
|
kOhm |
Mode
HVREX_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of HVREX_a122.