VCLEFT_a597 — LVBMB eFuse Self Test Not Ready
Full alert identifier: VCLEFT_a597_LVBMBeFuseSelfTestNotReady
Alert description
The low voltage (LV) battery internal protection transistor (MOSFET) self test has not yet completed.
Potential impact
Vehicle is unable to shift out of Park (P) until the LV battery internal protection transistor (MOSFET) self test completes or times out without completing. If the self test cannot complete and confirm LV battery MOSFET functionality, the LV battery may be unable to support vehicle electrical systems or to recharge via the power conversion system (PCS).
Set condition
The LV battery internal protection transistor (MOSFET) self test has not yet completed, potentially because a condition or combination of conditions prevents it from running. Alert log signal data should provide more information.
Clear condition
The LV battery internal protection transistor (MOSFET) self test completes, or times out after 35 seconds when the vehicle is in DRIVE power state.
Signals to check
These diagnostic fields are associated with VCLEFT_a597. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
EPB Released
VCLEFT_
|
— |
IBS Current Invalid
VCLEFT_
|
— |
LVBMB Current Invalid
VCLEFT_
|
— |
LVBMB E Fuse Open
VCLEFT_
|
— |
LV Bus Voltage Not Controllable
VCLEFT_
|
— |
LV Not Being Supported
VCLEFT_
|
— |
Closed Chg Result
VCLEFT_
|
— |
Closed D Chg Result
VCLEFT_
|
— |
Show 5 more fields
| Signal | Unit |
|---|---|
External Power Supply
VCLEFT_
|
— |
Lost LV Bus Control
VCLEFT_
|
— |
Lv Battery Low Charge
VCLEFT_
|
— |
Self Test State
VCLEFT_
|
— |
Vehicle Is Updating
VCLEFT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a597.