VCFRONT_a164 — eFuse Lckout Missing
Full alert identifier: VCFRONT_a164_eFuseLckoutMissing
Alert description
The front vehicle controller (VCFRONT) detects the voltage on the lockout circuit is not high enough when the right vehicle controller (VCRIGHT) reports the lockout circuit active, indicating the eFuse lockout is not successfully asserted.
Potential impact
No functionality should be directly affected when eFuse lockout is missing. However, one or more eFuses may toggle between enabled / not enabled states if the VCFRONT is reset and its non-volatile random access memory (NVRAM) does not function as expected. Note: VCFRONT should not attempt to toggle eFuses via the enable line when lockout is asserted, even after a reset.
Set condition
VCFRONT detects the voltage on the lockout circuit is not measured at 5V over 2 seconds when VCRIGHT reports that the lockout circuit is active.
Clear condition
VCFRONT detects that eFuse lockout is no longer asserted or voltage detected on the lockout circuit is greater than 2.5V when measured over 2 seconds.
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 |
|---|---|
Lockout Voltage
VCFRONT_
|
V |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a164.