DESCRIPTION
When the ignition switch is ON, the occupant detection ECU sends a signal to the airbag sensor assembly to indicate the state of the front seat inner belt assembly RH and also whether the front passenger seat is occupied. The airbag sensor assembly sends those signals to the combination meter assembly via CAN communication. The combination meter assembly illuminates, blinks or turns off the seat belt warning light on the combination meter assembly in accordance with these signals.
HINT:
The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
The seat belt warning system uses the CAN communication system. First, confirm
that there is no malfunction in the CAN communication system. Refer to the How to
Proceed with Troubleshooting procedure (See page
).
PROCEDURE
1. |
CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM) |
(a) Clear DTCs (See page ).
(b) Recheck for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC is not output |
A |
DTC is output |
B |
B |
GO TO OCCUPANT CLASSIFICATION SYSTEM |
|
2. |
CHECK DTC OUTPUT (AIRBAG SYSTEM) |
(a) Clear DTCs (See page ).
(b) Recheck for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC is not output |
A |
DTC is output |
B |
B |
GO TO AIRBAG SYSTEM |
|
3. |
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 / Occupant Detection / Data List.
(e) Read the Data List according to the display on the Techstream.
Occupant Detection
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Passenger Buckle SW |
Front passenger side buckle switch / Unset, Set or NG |
Unset: Front passenger side seat belt unfastened Set: Front passenger side seat belt fastened NG: Condition undetermined |
- |
Result |
Proceed to |
---|---|
Unset or Set is displayed on the Techstream screen according to the front passenger seat belt condition |
A |
Unset or Set is not displayed normally on the Techstream screen according to the front passenger seat belt condition |
B |
NG is displayed on the Techstream screen |
C |
B |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
C |
REPLACE OCCUPANT DETECTION ECU |
|
4. |
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 / SRS Airbag / Data List.
(e) Read the Data List according to the display on the Techstream.
SRS Airbag
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Right side Buckle SW |
Front RH side seat belt buckle switch / Unset, Set or NG |
Unset: Seat belt unfastened Set: Seat belt fastened NG: Condition undetermined |
- |
Result |
Proceed to |
---|---|
Unset or Set is displayed on the Techstream screen according to the front passenger seat belt condition |
A |
|
B |
A |
USE SIMULATION METHOD TO CHECK |
B |
REPLACE AIRBAG SENSOR ASSEMBLY |
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH THE TECHSTREAM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record the curren ...
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH TECHSTREAM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Be sure to make a not ...