The AFS ECU receives signals regarding the lighting condition of the headlight, shift position of the transmission, engine condition from the generator and vehicle speed from the combination meter using multiplex communication.

When the DTC (B2419) is output, the other BEAM communication DTCs are also output at the same time.

The swivel actuator receives a signal from the AFS ECU to operate and sends a signal regarding the direction of the headlight and condition of the headlight swivel motor to the AFS ECU.

The leveling actuator (headlight leveling motor) receives a signal from the AFS ECU to operate. The AFS ECU receives signals regarding the operating conditions of the leveling actuator (headlight leveling motor).

This DTC is output when a failure of the automatic light control sensor circuit is detected.

Lexus IS250 IS220d GSE20 ALE20 LIGHTING

Connect the intelligent tester to the DLC3.

Light control ECU

The light control ECU executes the fail-safe actions listed below in accordance with the item that has been detected.

Connect the intelligent tester to the DLC3.

Lighting system data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.

*1: RHD
*2: LHD
*3: With AFS