VCLEFT_a339 — Wste Ht Blckd By Msmtch
Full alert identifier: VCLEFT_a339_wsteHtBlckdByMsmtch
Alert description
The vehicle has detected at least one electronic control unit (ECU) required to supplement high voltage (HV) battery heating with waste heat running a firmware (software) version that may not be compatible with the firmware installed on the rest of the vehicle. When this occurs, the vehicle controller blocks the supplemental HV battery heating to make sure no ECU required is limited or unavailable due to firmware. May occur after an unsuccessful or incomplete firmware update, and may be resolved through a successful firmware update.
Potential impact
Inability to use waste heat to supplement HV battery heating may make charging at colder temperatures limited or unavailable.
Set condition
The vehicle detects at least one ECU required to supplement HV battery heating with waste heat running a different firmware version than expected.
Clear condition
The vehicle no longer detects any ECU required to supplement HV battery heating with waste heat running a different firmware version than expected.
Signals to check
These diagnostic fields are associated with VCLEFT_a339. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
ECU Mismatch Bits
VCLEFT_
|
— |
Service Mode
VCLEFT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a339.