Seat Belt Warning System: Inspection

Driver side:

INSPECT FRONT SEAT INNER BELT ASSY LH

Measure the resistance of the buckle switch.

Standard:

TESTER CONNECTION CONDITION SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 2	Fasten seat belt	1 MΩ or higher
1 - 2	Release seat belt	Below 1 Ω

If the result is not as specified, replace the inner belt assy.

Fig 1: Measuring Resistance Of Buckle Switch (Driver's Side)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Passenger side:

INSPECT FRONT SEAT INNER BELT ASSY RH

Measure the resistance of the buckle switch.

Standard:

TESTER CONNECTION CONDITION SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 2	Fasten seat belt	1 MΩ or higher
1 - 2	Release seat belt	Below 1 Ω

If the result is not as specified, replace the inner belt assy.

Fig 2: Measuring Resistance Of Buckle Switch (Passenger's Side)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Passenger side:

INSPECT OCCUPANT DETECTION SENSOR

Measure the resistance of the sensor.

Standard:

TESTER CONNECTION CONDITION SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 3	Apply more than 147 N (15 kg, 33 lb) to occupant detection sensor	Below 1 Ω
1 - 3	Do not touch occupant detection sensor	1 MΩ or higher

If the result is not as specified, replace the occupant detection sensor.

Fig 3: Measuring Resistance Of Occupant Detection Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT PASSENGER SEAT BELT WARNING LAMP ASSY

Apply battery voltage to the warning lamp terminals and check the warning lamp.

Ok:

MEASUREMENT CONDITION SPECIFICATION

Measurement Condition	Specified Condition
Battery positive (+) -> Terminal 20	Illuminates
Battery negative (-) -> Terminal 35	Illuminates

NOTE:

Apply protective tape to the battery leads to avoid contact with other terminals.
Disconnect the cable from the negative (-) battery terminal immediately after the lamp illuminates.

Fig 4: Applying Battery Voltage To Warning Lamp Terminals And Checking Warning Lamp

HINT:

When the system is normal, the warning lamp illuminates immediately after connecting the battery cables.

If the result is not as specified, replace the A/C control assy.