- 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
| 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 |
|
|
B2075 |
Malfunction in front seat belt inner RH |
|
*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
![2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
).
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
|
|
|
2. |
CHECK FOR DTC (AIRBAG SYSTEM) |
(a) Check DTCs for the airbag system (See page
).
OK:
Airbag system DTC is not output.
| NG |
|
|
|
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 |
| B |
|
| C |
|
|
|
4. |
REPLACE POWER MANAGEMENT CONTROL ECU |
(a) Replace the power management control ECU (See page
).
|
|
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 |
| NG |
|
|
6. |
REPLACE NETWORK GATEWAY ECU |
(a) Replace the network gateway ECU (See page
).
|
|
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 |
| NG |
|
|
|