DESCRIPTION
The combination meter assembly blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly (driver seat).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
*1: w/ Smart key System
Click here
HINT:
Click here
Click here
PROCEDURE
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
D Seat Buckle SW |
Driver seat belt buckle switch |
ON or OFF |
ON: Driver seat belt unfastened OFF: Driver seat belt fastened |
- |
Tester Display |
---|
D Seat Buckle SW |
OK:
ON or OFF appears on the Techstream screen according to the driver seat belt condition.
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
2. |
INSPECT FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT) |
(a) Remove the front seat inner belt assembly (driver seat).
Click here
(b) Inspect the front seat inner belt assembly (driver seat) (seat belt warning switch).
Click here
NG | ![]() |
REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT) |
|
3. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the main body ECU (multiplex network body ECU).
Click here
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
(b) Disconnect the 3H instrument panel junction block assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
MB-18 (DBKL) - 3H-33 |
Always |
Below 1 Ω |
NG | ![]() |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT) - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3H-33 - M73-3 (+) |
Always |
Below 1 Ω |
M73-3 (+) - Body ground |
Always |
10 kΩ or higher |
M73-2 (E) - Body ground |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Toyota CH-R Service Manual > Rear View Monitor System: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
(a) Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector
3 (DLC3) of the vehicle. When the rear view monitor system seems to be malfunctioning,
use the Techstream to check for malfunctions and to perform repairs.
CHECK DLC3
(a) Check the DLC3. ...
Toyota CH-R Service Manual > Occupant Classification System: Rear Occupant Classification Sensor LH Collision Detection (B1787)
DESCRIPTION
DTC B1787 is stored when the occupant detection ECU receives a collision detection
signal sent by the rear in weight detection sensor sub-assembly in the case of an
accident.
DTC B1787 is also stored when the front seat assembly RH is subjected to a strong
impact, even if an actu ...