DTC B2064 Vehicle Type Signal Malfunction

DESCRIPTION

The seat belt control ECU is connected to the gateway ECU using CAN communication.

The seat belt control ECU receives vehicle model information from the gateway ECU and determines whether the seat belt buckle switch information from the center airbag sensor assembly is for the driver seat or the passenger seat.

DTC B2064 is output when the CAN communication frame with the gateway ECU is normal and communication is available, but the steering wheel position information is not set or varies.

DTC No.	DTC Detecting Condition	Trouble Area
B2064	Communication with the network gateway ECU is normal and received steering wheel position information is not set (three times in succession)	Gateway ECU Seat belt control ECU

INSPECTION PROCEDURE

NOTICE:

When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed .

1.INITIALIZE SEAT BELT CONTROL ECU

Initialize the seat belt control ECU .

NEXT

2.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

Delete the DTC .

Recheck for DTC.

OK:
DTC B2064 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.REPLACE GATEWAY ECU

NEXT

4.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

Delete the DTC .

Recheck for DTC.

OK:
DTC B2064 is not output.

NG

REPLACE SEAT BELT CONTROL ECU

OK

END

LEXUS IS250, IS220d / GSE20 ALE20

PRE-CRASH SAFETY

Lexus IS250 IS220d GSE20 ALE20

PRE-CRASH SAFETY SYSTEM