DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK VEHICLE TYPE
CHECK FOR DTC
READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE BUCKLE SWITCH)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRIVER SIDE SEAT BELT WARNING LIGHT)
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
CHECK DRIVER SIDE SEAT BELT WARNING LIGHT
CHECK FOR DTC
READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE BUCKLE SWITCH)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRIVER SIDE SEAT BELT WARNING LIGHT)
INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Driver Side)
CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT - COMBINATION METER AND BODY GROUND)
SEAT BELT WARNING SYSTEM - Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When the ignition switch ON, the center airbag sensor assembly*1 (main body ECU [cowl side junction block LH]*2) transmits front seat inner belt state signals to the combination meter assembly through the CAN. If the driver seat belt is not fastened, the combination meter assembly blinks the driver side seat belt warning light. If the seat belt is fastened, the warning light goes off.
*1: w/ Airbag System
*2: w/o Airbag System
WIRING DIAGRAM
INSPECTION PROCEDURE
Check vehicle type.
Result| Result | Proceed to |
| w/ Airbag System | A |
| w/o Airbag System | B |
Check for DTCs.
Result| Result | Proceed to |
| DTC is not output | A |
| CAN system DTC is output (for LHD) | B |
| CAN system DTC is output (for RHD) | C |
| Airbag system DTC is output | D |
| | Go to CAN COMMUNICATION SYSTEM ()
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| | Go to CAN COMMUNICATION SYSTEM ()
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| 3.READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE BUCKLE SWITCH) |
Check the Data List for proper functioning of the driver side seat belt buckle switch.
SRS Airbag| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Driver Buckle SW | Driver side seat belt / Set, Unset or NG | Set: Driver side seat belt is fastened
Unset: Driver side seat belt is unfastened | NG: Data is not determined |
Result| Result | Proceed to |
| Set or Unset is displayed on the tester screen according to the driver side seat belt condition | A |
| Set or Unset is not displayed normally on the tester screen according to the driver side seat belt condition | B |
| NG is displayed on the tester screen | C |
| | REPLACE FRONT SEAT INNER BELT ASSEMBLY (for Driver Side) ()
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| | REPLACE CENTER AIRBAG SENSOR ASSEMBLY ()
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| 4.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRIVER SIDE SEAT BELT WARNING LIGHT) |
Operate the intelligent tester according to the display and select Active Test.
Combination Meter| Item | Test Part | Control Range | Diagnostic Note |
| Driver Side Seat Belt | Driver side seat belt warning light | ON/OFF | Confirm that the vehicle is stopped and the engine is idling. |
- OK:
- Driver side seat belt warning light condition can be switched by Active Test.
Result| Result | Proceed to |
| OK | A |
| NG (w/ Multi-information Display) | B |
| NG (w/o Multi-information Display) | C |
| | REPLACE COMBINATION METER ()
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| | REPLACE COMBINATION METER ()
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| 5.REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
Temporarily replace the center airbag sensor assembly with a new one ().
| 6.CHECK DRIVER SIDE SEAT BELT WARNING LIGHT |
Check the driver side seat belt warning light function ().
- OK:
- Driver side seat belt warning light operates normally.
Result| Result | Proceed to |
| OK | A |
| NG (w/ Multi-information Display) | B |
| NG (w/o Multi-information Display) | C |
| | REPLACE COMBINATION METER ASSEMBLY ()
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| | REPLACE COMBINATION METER ASSEMBLY ()
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| A | |
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| END (CENTER AIRBAG SENSOR ASSEMBLY IS DEFECTIVE) |
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Result| Result | Proceed to |
| DTC is not output | A |
| CAN system DTC is output (for LHD) | B |
| CAN system DTC is output (for RHD) | C |
| | Go to CAN COMMUNICATION SYSTEM ()
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| | Go to CAN COMMUNICATION SYSTEM ()
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| 8.READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE BUCKLE SWITCH) |
Check the Data List for proper functioning of the driver side seat belt buckle switch.
Main Body| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| D Seat Buckle SW | Driver side seat belt / ON or OFF | ON: Driver side seat belt is fastened
OFF: Driver side seat belt is unfastened | - |
- OK:
- The display is as specified in the normal condition column.
| 9.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRIVER SIDE SEAT BELT WARNING LIGHT) |
Operate the intelligent tester according to the steps on the display and select Active Test.
Combination Meter| Item | Test Part | Control Range | Diagnostic Note |
| Driver Side Seat Belt | Driver side seat belt warning light | ON/OFF | Confirm that the vehicle is stopped and the engine is idling. |
- OK:
- Driver side seat belt warning light condition can be switched by Active Test.
| | REPLACE COMBINATION METER ASSEMBLY ()
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| OK | |
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| REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
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| 10.INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Driver Side) |
Remove the front seat inner belt assembly (for Driver Side) ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 12 - 9 | Seat belt unfastened (buckle switch is off) | Below 1 Ω |
| Seat belt fastened (buckle switch is on) | 10 kΩ or higher |
| | REPLACE FRONT SEAT INNER BELT ASSEMBLY (for Driver Side) ()
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| 11.CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT - COMBINATION METER AND BODY GROUND) |
Disconnect the K43*1 or L49*2 front seat inner belt assembly (for Driver Side) connector.
Disconnect the E1 main body ECU (cowl side junction block LH) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for LHD:
| Tester Connection | Condition | Specified Condition |
| K43-12 - E1-7 (DBKL) | Always | Below 1 Ω |
| K43-12 or E1-7 (DBKL) - Body ground | Always | 10 kΩ or higher |
| K43-9 - Body ground | Always | Below 1 Ω |
- for RHD:
| Tester Connection | Condition | Specified Condition |
| L49-12 - E1-7 (DBKL) | Always | Below 1 Ω |
| L49-12 or E1-7 (DBKL) - Body ground | Always | 10 kΩ or higher |
| L49-9 - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
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