The occupant detection system sensor is installed under the seat upholstery and monitors the physique and posture of the front passenger. Using this information, the occupant detection system determines whether the front passenger's SRS frontal airbag should be deployed or not.
If the front passenger's seat cushion is wet, this may adversely affect the ability of the system to determine deployment. If the seat cushion is wet, the front passenger should stop sitting on the front passenger's seat. Wipe off liquid from the seat immediately, let the seat dry naturally and then check the SRS airbag system warning light as follows.

SRS airbag system warning light (type A)

SRS airbag system warning light (type B)

Front passenger's frontal
airbag ON
indicator
Front passenger's frontal
airbag OFF
indicator
Also, if luggage or electronic devices are placed on the front passenger's seat, this may adversely affect the ability of the system to determine deployment. This may prevent the front passenger's frontal airbag ON and OFF indicators from working properly. Check that the indicators work properly.
When the OFF indicator turns off and the ON indicator illuminates, the front passenger's frontal airbag may deploy during a collision. Remove luggage and electronic devices from the front passenger's seat.
CAUTION
Electrical devices, such as cell phones, laptops, portable music players, or electronic games, especially when connected to the accessory power outlet and placed on the front passenger's seat or used by the person sitting in the front passenger's seat, may affect the operation of the occupant detection system.
If either of the following situations occurs when using an electronic device in the vehicle, at first try to relocate that device to avoid it creating any interference.
If the device continues to cause interference, the use of that device in the vehicle should be discontinued.
NOTE
This device complies with Part 18 of the FCC Rules. This device may cause interference. If this device causes interference, consult the nearest SUBARU dealer. Also, for maintenance of the system, consult the nearest SUBARU dealer. This product may cause interference to radio equipment and should not be installed near maritime safety communications equipment or other critical navigation or communication equipment operating between 0.45-30 MHz.
Front passenger's SRS frontal airbag
Conditions in which front passenger's SRS frontal airbag is not activatedFront passenger's seatbelt
The front passenger's seatbelt has
shoulder belt and lap belt pretensioner.
Seatbelt retractor assembly (shoulder
belt pretensioner)
Lap belt pretensioner
On the front passenger's side, the
shoulder belt pretensioner is supplemented
by a lap belt pretensioner, which is
located at ...
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