Toyota Tacoma (2015-2018) Service Manual: Front Passenger Side Seat Belt Warning Light Malfunction
DESCRIPTION
The occupant classification ECU detects the state of the front seat inner belt assembly RH and load sensor when the front passenger side seat is occupied with the ignition switch ON. If the front passenger side seat belt is not fastened, the front passenger side seat belt warning light on the combination meter assembly blinks. If the seat belt is fastened, the warning light goes off.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM) |
(a) Clear the DTCs (See page .gif)
).
(b) Check for DTCs (See page ).
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B | .gif) |
GO TO OCCUPANT CLASSIFICATION SYSTEM |
|
.gif)
|
2. |
CHECK DTC OUTPUT (AIRBAG SYSTEM) |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B | |
GO TO AIRBAG SYSTEM |
|
|
3. |
READ VALUE USING TECHSTREAM (PASSENGER BUCKLE SW) |
(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 seat belt buckle switch/Unset, Set or NG |
Unset: Front passenger side seat belt unfastened Set: Front passenger side seat belt fastened NG: Data not determined |
- |
|
Result |
Proceed to |
|---|---|
|
Unset or Set is displayed on the Techstream according to the front passenger seat belt condition |
A |
|
Unset or Set is not displayed correctly on the Techstream according to the front passenger seat belt condition |
B |
|
NG is displayed on the Techstream |
C |
| B | |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
| C | |
REPLACE OCCUPANT CLASSIFICATION ECU |
|
|
4. |
READ VALUE USING TECHSTREAM (RIGHT SIDE BUCKLE SW) |
(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 passenger side seat belt buckle switch/Unset, Set or NG |
Unset: Front passenger side seat belt unfastened Set: Front passenger side seat belt fastened NG: Data not determined |
- |
|
Result |
Proceed to |
|---|---|
|
Unset or Set is displayed on the Techstream according to the front passenger seat belt condition |
A |
|
B |
| A | |
USE SIMULATION METHOD TO CHECK |
| B | |
REPLACE AIRBAG SENSOR ASSEMBLY |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT DRIVER SEAT BELT WARNING LIGHT
HINT:
The seat belt warning light on the combination meter assembly is used for both
the driver seat and front passenger ...
Sliding Roof
...
Other materials:
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL FRONT OIL PUMP OIL SEAL
(a) Using SST and a hammer, install a new front oil pump oil seal to
the front oil pump body sub-assembly.
SST: 09350-30020
09351-32140
Standard depth:
-0.3 to 0.3 mm (-0.0118 to 0.0118 in.)
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT AIR CONDITIONING CONTROL ASSEMBLY
(a) Check the blower switch resistance.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Component without harness connected
...
Removal
REMOVAL
PROCEDURE
1. REMOVE FUEL DELIVERY PIPE ASSEMBLY LH (FUEL PRESSURE SENSOR)
(See page )
NOTICE:
Do not remove the fuel pressure sensor from the fuel delivery pipe sub-assembly
LH.
If a fuel pressure sensor is removed, replace the fuel delivery pipe
sub-assembly LH (fu ...
