Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJT7 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 11/2017] |
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: B2074,B2075; Driver Side Seat Belt Buckle Switch Circuit Malfunction; 2016 - 2017 MY Sienna [12/2015 - 11/2017] |
DTC
|
B2074
|
Driver Side Seat Belt Buckle Switch Circuit Malfunction
|
DTC
|
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.
DTC No.
|
DTC Detection Condition
|
Trouble Area
|
B2074
|
Malfunction in front seat belt inner LH
|
-
Wire harness or connector
-
Front seat inner belt LH assembly
-
Center airbag sensor assembly
-
Seat belt control ECU
-
Power management control ECU*1
-
Network gateway ECU*2
|
B2075
|
Malfunction in front seat belt inner RH
|
-
Wire harness or connector
-
Front seat inner belt RH assembly
-
Occupant classification ECU
-
Center airbag sensor assembly
-
Seat belt control ECU
-
Power management control ECU*1
-
Network gateway ECU*2
|
*1: w/ Smart Key System
*2: w/o Smart Key System
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection (See page
).
PROCEDURE
1.
|
CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
|
(a) Clear the DTCs (See page
).
(b) Check for DTCs (See page
).
OK:
CAN communication system DTC is not output.
NG |
|
GO TO CAN COMMUNICATION SYSTEM
(See page
)
|
OK
|
|
|
2.
|
CHECK FOR DTC (AIRBAG SYSTEM)
|
(a) Check DTCs for the airbag system (See page
).
OK:
Airbag system DTC is not output.
OK
|
|
|
3.
|
CHECK FOR DTC (OCCUPANT CLASSIFICATION SYSTEM)
|
(a) Check DTCs for the occupant classification system (See page
).
OK:
DTC B1771 is not output.
Result
Result
|
Proceed to
|
DTC B1771 is not output (w/ Smart Key System)
|
A
|
DTC B1771 is not output (w/o Smart Key System)
|
B
|
DTC B1771 is output
|
C
|
A
|
|
|
4.
|
REPLACE POWER MANAGEMENT CONTROL ECU
|
(a) Replace the power management control ECU (See page
).
NEXT
|
|
|
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 (See page
).
(c) Check for DTCs (See page
).
OK:
DTC B2074 or B2075 is not output.
OK |
|
END
|
6.
|
REPLACE NETWORK GATEWAY ECU
|
(a) Replace the network gateway ECU (See page
).
NEXT
|
|
|
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 (See page
).
(c) Check for DTCs (See page
).
OK:
DTC B2074 or B2075 is not output.
OK |
|
END
|
|