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:
Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0126,U0129,U0142,U0155)
DESCRIPTION
When a malfunction is detected between various ECUs and sensors, these DTCs are
stored.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
U0100
Lost Communication with ECM / PCM "A"
...
XM Tuner Antenna Disconnected (B15FE,B15FF)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the antenna assembly with
holder which is connected to the navigation receiver assembly assembly.
DTC No.
DTC Detection Condition
Trouble Area
B15FE
The antenna assembly wi ...
Precaution
PRECAUTION
1. PRECAUTIONS WHEN CHECKING FOR DTCS
(a) When the cable is disconnected from the negative (-) battery terminal, the
DTCs stored in the steering lock ECU (steering lock actuator or UPR bracket assembly)
are cleared. Be sure to record any output DTCs immediately.
(b) Normally, with ...
