VCREAR_a511 — DCDC Saturation Load Shed

Full alert identifier: VCREAR_a511_DCDCSaturationLoadShed

Alert description

Electrical current flowing through the power conversion system (PCS) eFuse is approaching the DCDC converter's maximum handling capacity. The left vehicle controller (VCLEFT) 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 VCLEFT limits LV electrical system current draw by cutting power to some electronic control units (ECUs).

Set condition

The DCDC reports it is saturated for 2 seconds.

Clear condition

The DCDC reports it is no longer saturated for long enough for VCLEFT to stop loadshedding (until DCDC Saturation Loadshed Stage is MIN).

Signals to check

These diagnostic fields are associated with VCREAR_a511. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
DCDC Continuous Power Limit `VCREAR_a511_DCDCContinuousPowerLimit`	W
DCDC Output Limited `VCREAR_a511_DCDCOutputLimited`	—
DCDC Output Power `VCREAR_a511_DCDCOutputPower`	W
DCDC Support Status `VCREAR_a511_DCDCSupportStatus` 0 IDLE 1 ACTIVE 2 FAULTED	—
PCS Signals Are Valid `VCREAR_a511_PCSSignalsAreValid`	—
Factory Gated `VCREAR_a511_factoryGated`	—
Jump Post Active `VCREAR_a511_jumpPostActive`	—
Service Mode `VCREAR_a511_serviceMode`	—

Show 1 more field

Signal	Unit
Vehicle Is Updating `VCREAR_a511_vehicleIsUpdating`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCREAR_a511.