VCLEFT_a474 — Left Headlamp Internal Error

Full alert identifier: VCLEFT_a474_leftHeadlampInternalError

Alert description

An internal condition affecting left headlamp functionality has been detected - certain light functions may be degraded or disabled

Potential impact

Certain light functions may be degraded or disabled. These functions will retry after the next headlamp power cycle (which occurs during sleep)

Set condition

The voltage measured across the low beam, high beam, side marker, ambient, or turn signal LEDs is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the LED matrix manager EEPROM are out of range.

Clear condition

Headlamp power cycle (this occurs during sleep)

Signals to check

These diagnostic fields are associated with VCLEFT_a474. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
EEPROM LED Current Bin Status `VCLEFT_a474_EEPROM_LEDCurrentBinStatus` 0 OK 1 FAULT	—
Tps92520 bstuv `VCLEFT_a474_TPS92520_BSTUV` 0 OK 1 FAULT	—
Tps92520 compov `VCLEFT_a474_TPS92520_COMPOV` 0 OK 1 FAULT	—
Tps92520 hsilim `VCLEFT_a474_TPS92520_HSILIM` 0 OK 1 FAULT	—
Headlamp ECU Revision `VCLEFT_a474_headlampECURevision`	—
Headlamp Hardware Variant Mismatch `VCLEFT_a474_headlampHardwareVariantMismatch` 0 OK 1 FAULT	—
High Beam Status `VCLEFT_a474_highBeamStatus` 0 OK 1 OVERVOLTAGE FAULT 2 UNDERVOLTAGE FAULT 3 DRIVER STATUS FAULT 4 OVERVOLTAGE FALSE TRIGGER 5 UNDERVOLTAGE FALSE TRIGGER 6 DRIVER STATUS FALSE TRIGGER	—
Low Beam Status `VCLEFT_a474_lowBeamStatus` 0 OK 1 OVERVOLTAGE FAULT 2 UNDERVOLTAGE FAULT 3 DRIVER STATUS FAULT 4 OVERVOLTAGE FALSE TRIGGER 5 UNDERVOLTAGE FALSE TRIGGER 6 DRIVER STATUS FALSE TRIGGER	—

Show 3 more fields

Signal	Unit
Side Marker Status `VCLEFT_a474_sideMarkerStatus` 0 OK 1 OVERVOLTAGE FAULT 2 UNDERVOLTAGE FAULT 3 DRIVER STATUS FAULT 4 OVERVOLTAGE FALSE TRIGGER 5 UNDERVOLTAGE FALSE TRIGGER 6 DRIVER STATUS FALSE TRIGGER	—
Signature Light Status `VCLEFT_a474_signatureLightStatus` 0 OK 1 OVERVOLTAGE FAULT 2 UNDERVOLTAGE FAULT 3 DRIVER STATUS FAULT 4 OVERVOLTAGE FALSE TRIGGER 5 UNDERVOLTAGE FALSE TRIGGER 6 DRIVER STATUS FALSE TRIGGER	—
Turn Signal Status `VCLEFT_a474_turnSignalStatus` 0 OK 1 OVERVOLTAGE FAULT 2 UNDERVOLTAGE FAULT 3 DRIVER STATUS FAULT 4 OVERVOLTAGE FALSE TRIGGER 5 UNDERVOLTAGE FALSE TRIGGER 6 DRIVER STATUS FALSE TRIGGER	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a474.