VCFRONT_a407 — Dcr Milli Ohms Above Threshold
Full alert identifier: VCFRONT_a407_dcrMilliOhmsAboveThreshold
Alert description
The low voltage (LV) battery internal resistance is too high, based on a direct current internal resistance (DCR) calculation. Indicates LV battery replacement is necessary.
Potential impact
The LV battery may be unable to support precharge loads / precharge the high voltage (HV) bus, and requires replacement.
Set condition
Direct current internal resistance (DCR) calculation indicates the LV battery internal resistance exceeds expected threshold (normal operating range).
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.
Signals to check
Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.
| Signal | Unit |
|---|---|
IBS Temperature
VCFRONT_
|
degC |
Avg Interval Current
VCFRONT_
|
A |
Avg Pulse Current
VCFRONT_
|
A |
Dcr Milli Ohms
VCFRONT_
|
mOhms |
Interval Current Variance
VCFRONT_
|
A |
Pulse Current Variance Shifted
VCFRONT_
|
A |
Test Counter
VCFRONT_
|
— |
| Signal | Unit |
|---|---|
Dcr 12 V Threshold
VCFRONT_
|
— |
Opportunistic Test
VCFRONT_
|
— |
Testing Expended
VCFRONT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a407.