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 buckle switch circuit or passenger side buckle switch circuit.





*1: w/ Smart Key System

*2: w/o Smart Key System

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 FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Clear the DTCs How to Proceed With Troubleshooting.

(b) Check for DTCs How to Proceed With Troubleshooting.

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 FOR DTC (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 FOR DTC (OCCUPANT CLASSIFICATION SYSTEM)

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

OK:

DTC B1771 is not output.

Result





C -- GO TO OCCUPANT CLASSIFICATION SYSTEM Occupant Classification System

B -- REPLACE NETWORK GATEWAY ECU
A -- Continue to next step.

4. REPLACE POWER MANAGEMENT CONTROL ECU

(a) Replace the power management control ECU Removal.

NEXT -- Continue to next step.

5. CHECK FOR DTC (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) Check for DTCs Pre-Collision System.

OK:

DTC B2074 or B2075 is not output.

NG -- REPLACE SEAT BELT CONTROL ECU Removal

OK -- END

6. REPLACE NETWORK GATEWAY ECU

(a) Replace the network gateway ECU Removal.

NEXT -- Continue to next step.

7. CHECK FOR DTC (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) Check for DTCs Pre-Collision System.

OK:

DTC B2074 or B2075 is not output.

NG -- REPLACE SEAT BELT CONTROL ECU Removal

OK -- END