B2074

PRE-COLLISION: PRE-COLLISION SYSTEM: B2074,B2075: Driver Side Seat Belt Buckle Switch Circuit Malfunction
B2075 - Passenger Side Seat Belt Buckle Switch Circuit Malfunction

DESCRIPTION

These DTCs are stored when a malfunction is detected in the driver side seat buckle switch circuit or passenger side seat belt buckle switch circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection How to Proceed With Troubleshooting.

PROCEDURE

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Clear the DTCs Pre-Collision System.

(b) Recheck for DTCs.

OK:

CAN communication system DTC is not output.

NG -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC OUTPUT (AIRBAG SYSTEM)

(a) Check DTCs for the airbag system DTC Check / Clear.

OK:

Airbag system DTC is not output.

NG -- GO TO AIRBAG SYSTEM Airbag System
OK -- Continue to next step.

3. CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM)

(a) Check DTC for the occupant classification system Reading and Clearing Diagnostic Trouble Codes.

OK:

Occupant classification system DTC is not output.

NG -- GO TO OCCUPANT CLASSIFICATION SYSTEM Occupant Classification System
OK -- Continue to next step.

4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)

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

(b) Clear the DTCs Pre-Collision System.

(c) Recheck for DTCs.

OK:

DTC B2074 or B2075 is not output.

NG -- REPLACE SEAT BELT CONTROL ECU

OK -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting