Toyota Yaris: Seat Belt Warning System / Front Passenger Side Seat Belt Warning Light does not Operate
DESCRIPTION
The combination meter assembly blinks or turns off the passenger seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly RH and occupant detection sensor (separate type front seat cushion pad RH).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
HINT:
-
The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. Check that the operation of the seat belt warning light is normal first.
Click here
-
If the seat belt warning light does not operate for both the driver seat and front passenger seat, replace the combination meter assembly.
Click here
PROCEDURE
| 1. | READ VALUE USING GTS (PASSENGER SEAT BUCKLE SWITCH STATUS / PASSENGER SEAT OCCUPANT SENSOR STATUS) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Power Distribution Box > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Passenger Seat Buckle Switch Status | Passenger side seat belt buckle switch status | Set, Unset, Unknown | Set: Passenger seat belt fastened Unset: Passenger seat belt not fastened Unknown: Data is not determined | - |
| Passenger Seat Occupant Sensor Status | Passenger seat occupant detection sensor status | OFF, ON, Unknown | OFF: Passenger seat not occupied ON: Passenger seat occupied Unknown: Data is not determined | - |
| Tester Display |
|---|
| Passenger Seat Buckle Switch Status |
| Passenger Seat Occupant Sensor Status |
OK:
The GTS display changes correctly in response to the front passenger seat belt and front passenger seat condition.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (Passenger Seat Buckle Switch Status) | B |
| NG (Passenger Seat Occupant Sensor Status) | C |
| B |
 | GO TO STEP 3 |
| C |
 | GO TO STEP 5 |
|
| 2. | PERFORM ACTIVE TEST USING GTS (DRIVER SIDE SEAT BELT WARNING) |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Combination Meter > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Driver Side Seat Belt Warning | Front seat belt warning light | ON or OFF | - |
| OK |
 | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
 | REPLACE COMBINATION METER ASSEMBLY |
| 3. | INSPECT FRONT SEAT INNER BELT ASSEMBLY RH |
Click here
| NG |
 | REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
|
| 4. | CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) |
(a) Disconnect the 4E power distribution box assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O17-3 (+) - 4E-11 | Always | Below 1 Ω |
| O17-3 (+) or 4E-11 - Body ground | Always | 10 kΩ or higher |
| O17-2 (E) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 5. | INSPECT FRONT SEAT INNER BELT ASSEMBLY RH |
Click here
| NG |
 | REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
|
| 6. | INSPECT OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD RH) |
Click here
| NG |
 | REPLACE OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD RH) |
|
| 7. | CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) |
(a) Disconnect the 4E power distribution box assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O17-5 (+) - 4E-29 | Always | Below 1 Ω |
| O17-5 (+) or 4E-29 - Body ground | Always | 10 kΩ or higher |
| O17-4 (E) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Driver Side Seat Belt Warning Light does not Operate
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 LH...
Rear Seat Belt Warning Light Malfunction
DESCRIPTION The main body ECU (multiplex network body ECU) detects whether either the rear doors are open or closed based on the courtesy light switch condition and then sends the rear door status signal to the combination meter assembly...
Other information:
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Backup Boost Converter "A" Circuit Current Above Threshold (P323A19)
DESCRIPTION A backup boost converter is built into the engine stop and start ECU. The backup boost converter helps maintain auxiliary battery voltage to prevent various functions from failing if power source voltage supplied from the backup boost converter drops due to the high electrical load when the engine is restarted by stop and start control...
Toyota Yaris XP210 (2020-2024) Owner's Manual: Engine Start Function When Key Battery is Dead
If the engine cannot be started due to a dead key battery, the engine can be started using the following procedure: Continue to depress the brake pedal firmly until the engine has completely started. Manual transaxle: Continue to depress the clutch pedal firmly until the engine has completely started...
Categories
- Manuals Home
- Toyota Yaris Owners Manual
- Toyota Yaris Service Manual
- Headlights
- Engine Start Function When Key Battery is Dead
- Battery Monitor Module General Electrical Failure (P058A01)
- New on site
- Most important about car
Liftgate/Trunk Lid
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
