VCFRONT_a511 — DCDC Saturation Load Shed

Full alert identifier: VCFRONT_a511_DCDCSaturationLoadShed

Alert description

Electrical current flowing through the power conversion system (PCS) eFuse is approaching the DCDC converter's maximum handling capacity. The front vehicle controller (VCFRONT) is shedding some vehicle electrical loads by cutting power to less essential electronic control units (ECUs).

Potential impact

Some convenience features will be unavailable as VCFRONT limits LV electrical system current draw by cutting power to some electronic control units (ECUs).

Set condition

The PCS eFuse current value is within 20A of the DCDC converter's maximum handling capacity for 5 seconds.

Clear condition

The PCS eFuse current value remains lower than the DCDC converter's maximum handling capacity long enough for VCFRONT to stop loadshedding (until DCDC Saturation Loadshed Stage is MIN).

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
DCDC Max Output Current Allowed `VCFRONT_a511_DCDCMaxOutputCurrentAllowed`	A
PCSE Fuse Current `VCFRONT_a511_PCSEFuseCurrent`	A

Signal	Unit
DCDC Output Is Limited `VCFRONT_a511_DCDCOutputIsLimited`	—
PCS Signals Are Valid `VCFRONT_a511_PCSSignalsAreValid`	—
Factory Gated `VCFRONT_a511_factoryGated`	—
Frunk Open `VCFRONT_a511_frunkOpen`	—
Hv State `VCFRONT_a511_hvState` 0 DOWN 1 COMING UP 2 GOING DOWN 3 UP FOR DRIVE 4 UP FOR CHARGE 5 UP FOR DC CHARGE 6 UP	—
Service Mode `VCFRONT_a511_serviceMode`	—
Vehicle Is Updating `VCFRONT_a511_vehicleIsUpdating`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a511.