B2419

Diagnostic trouble codes

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 DTCs are output at the same time.

DTC No.	DTC Detection Condition	Trouble 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. (Click here)

Result:

Result
Proceed to

MPX DTC is not output
A

MPX DTC is output
B

GO TO MULTIPLEX COMMUNICATION SYSTEM

REPLACE AFS ECU

Result	Proceed to
MPX DTC is not output	A
MPX DTC is output	B