Toyota Yaris: Seat Belt Warning System / 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.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
The seat belt warning system uses the CAN communication system and CXPI communication system. First, confirm that there is no malfunction in the CAN communication system and CXPI communication system. Refer to the How to Proceed with Troubleshooting procedure.
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- 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.
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-
If the seat belt warning light does not operate for both the driver seat and front passenger seat, replace the combination meter assembly.
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PROCEDURE
| 1. | 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:
The GTS display changes correctly in response to the warning light condition.
| NG |
 | REPLACE COMBINATION METER ASSEMBLY |
|
| 2. | READ VALUE USING GTS (DRIVER BUCKLE SWITCH) |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Combination Meter > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Driver Buckle Switch | Driver side seat belt buckle switch status | Fastened or Not Fastened | Fastened: Driver side seat belt fastened Not Fastened: Driver side seat belt not fastened | - |
| Tester Display |
|---|
| Driver Buckle Switch |
OK:
The GTS display changes correctly in response to the driver seat belt condition.
| OK |
 | REPLACE COMBINATION METER ASSEMBLY |
|
| 3. | INSPECT FRONT SEAT INNER BELT ASSEMBLY LH |
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| NG |
 | REPLACE FRONT SEAT INNER BELT ASSEMBLY LH |
|
| 4. | CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O18-3 (+) - H7-34 (BKL) | Always | Below 1 Ω |
| O18-3 (+) or H7-34 (BKL) - Body ground | Always | 10 kΩ or higher |
| O18-2 (E) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE COMBINATION METER ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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 seat...
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Keys
To use the auxiliary key, press the knob and pull out the auxiliary key from the smart key.
