Lexus IS250 IS220d GSE20 ALE20 - LIGHTING

DESCRIPTION

INSPECTION PROCEDURE

CHECK MULTIPLEX COMMUNICATION SYSTEM

DTC B2419 BEAN Communication Malfunction

DESCRIPTION

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.

DTC No.DTC Detection ConditionTrouble Area
B2419
Malfunction in multiplex communication system
Open or short in multiplex communication system circuit.
Multiplex communication system
Wire harness or connector
AFS ECU

INSPECTION PROCEDURE

1.CHECK MULTIPLEX COMMUNICATION SYSTEM

Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

  • Result:
  • ResultProceed to
    MPX DTC is not outputA
    MPX DTC is outputB
B
GO TO MULTIPLEX COMMUNICATION SYSTEM
A
REPLACE AFS ECU
LEXUS IS250, IS220d / GSE20 ALE20
LIGHTING
Lexus IS250 IS220d GSE20 ALE20
LIGHTING SYSTEM