Occupant Classification Sensor; Seat Belt Buckle Switch - Toyota 2006 PRIUS Manual

2. Occupant Classification Sensor

The occupant classification sensors are installed on four brackets connecting the seat rail and the seat frame.
The resistance values of these sensors which vary in accordance with the distortion that acts on the brackets
are output to the occupant classification ECU.
Occupant Classification Sensor

3. Seat Belt Buckle Switch

The seat belt buckle switch which consists of an ejector with a plate, a Hall IC, and two magnets is
integrated in the front seat inner belt assembly.
The ejector with plate blocks the magnetic flux density between the two magnets. The Hall IC outputs this
change to the airbag sensor assembly.
Seat Belt
Magnetic Flux
NEW FEATURES - SRS AIRBAG SYSTEM
Output
Voltage
Ejector
Hall IC
Plate
Seat belt not fastened
Load
(V)
5
2
0
-
0
Load
Airbag Sensor Assembly
(for Driver) or Occupant
Classification ECU
(for Front Passenger)
Magnets
Seat belt fastened
39
NF
+
(N)
259ESW26
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