PRE-COLLISION: PRE-COLLISION SYSTEM: DESCRIPTION (2008 LX570)

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Last Modified: 11-27-2007		1.6 C
Service Category: Vehicle Interior	Section: Supplemental Restraint Systems
Model Year: 2008	Model: LX570	Doc ID: RM000002JR0009X
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2074

Driver Side Seat Belt Buckle Switch Circuit Malfunction

DESCRIPTION

This DTC is stored when there is a malfunction in the front seat inner belt buckle switch circuit for the driver side. The seat belt control ECU receives buckle switch condition information from the center airbag sensor via the CAN communication line and controls the pre-collision system.

When DTC B2074 is stored, DTC B1655 is also stored.

DTC Code	DTC Detection Condition	Trouble Area
B2074	Malfunction in the front seat inner belt (buckle switch) circuit.	Front seat inner belt LH assembly Center airbag sensor Seat belt control ECU CAN communication system

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

If DTC B1655 is not cleared, DTC B2074 continues to be stored.

PROCEDURE

1.	CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Use the Techstream to check if the CAN communication system is functioning normally .

OK:

DTC U0151 is not output.

2.	CHECK DTC (AIRBAG SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / SRS Airbag / Trouble Code.

(b) Clear the DTCs .

OK:

DTC B1655 is not output.

3.	CHECK DTC (PRE-COLLISION SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Code.

(b) Clear the DTCs .

OK:

DTC B2074 is not output.