Dtc B2074 Driver Side Seat Belt Buckle Switch Circuit Malfunction


DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTC (AIRBAG SYSTEM)

CHECK FOR DTC

DTC B2074 Driver Side Seat Belt Buckle Switch Circuit Malfunction


DESCRIPTION

The seat belt control ECU receives driver side buckle switch condition information from the center airbag sensor assembly through the CAN communication line and controls the pre-crash safety system.
This code is stored when a buckle switch malfunction signal is received from the airbag system.
When DTC B2074 is stored, DTC B1655/37 is also stored.

DTC Code
DTC Detection Condition
Trouble Area
B2074
While the initial check is running, the ignition switch is ON and the pre-crash safety system is operating, malfunction a signal is received from the center airbag sensor for 3 seconds.
  1. Airbag system
  2. Seat belt control ECU

INSPECTION PROCEDURE

1.CHECK FOR DTC (AIRBAG SYSTEM)

  1. Check for DTCs (LandCruiser RM000000XFE0NGX.html).

    OK:
    DTC B1655/37 is not output.


NG
GO TO AIRBAG SYSTEM (LandCruiser RM000000XF60N2X.html)
OK


2.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM0000043K500GX.html).

  1. Check for DTCs (LandCruiser RM0000043K500GX.html).

    OK:
    DTC B2074 is not output.


NG
REPLACE SEAT BELT CONTROL ECU (LandCruiser RM000003UX700KX.html)
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)