PASSENGER SENSING SYSTEM [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.]

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Purpose

•  The passenger sensing system controls the front passenger's air bag and pre-tensioner seat belt operation (deployment) based on the passenger seat status signal.

Function

•  The SAS control module switches the following air bag modules and pre-tensioner seat belt between operable (deployable) standby and inoperable (non-deployable) based on the passenger seat status signal received from the seat weight sensor control module.

Passenger seat status signal
•  Passenger-side air bag module
•  Passenger-side knee air bag module
•  Passenger-side side air bag module
•  Passenger-side front pre-tensioner seat belt

PAD indicator

Passenger air bag indicator

PAD OFF indicator
Adult
Operation (deployment) standby status
OFF
OFF
Child
Operation (deployment) inhibited status
ON
ON
Empty
Operation (deployment) inhibited status
ON
ON

•  For details on the passenger seat status signal, refer to the [SEAT WEIGHT SENSOR CONTROL MODULE]. (See SEAT WEIGHT SENSOR CONTROL MODULE [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.])

Construction

•  The passenger sensing system consists of the following parts:
―  SAS control module
―  Seat weight sensor control module
―  Seat weight sensor
―  PAD indicator
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Operation


Passenger seat status signal indicates adult

1.  When the ignition is switched ON (engine off or on), the SAS control module sends (2) a PAD indicator request signal to the indicator unit based on the passenger seat status signal (1).

2.  The indicator unit turns the transistor off (3) based on the PAD indicator request signal.

3.  When the transistor turns off, the passenger air bag indicator and PAD OFF indicator turn off (4).

4.  The SAS control module puts the passenger-side air bag module, passenger-side knee air bag module, passenger-side side air bag module and passenger-side front pre-tensioner seat belt on operation (deployment) standby.

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Passenger seat status signal indicates child/empty

1.  When the ignition is switched ON (engine off or on), the SAS control module sends (2) a PAD indicator request signal to the indicator unit based on the passenger seat status signal (1).

2.  The indicator unit turns on the transistor (3) based on the PAD indicator request signal.

3.  When the transistor turns on, the passenger air bag indicator and PAD OFF indicator turn on (4).

4.  The SAS control module inhibits the operation (deployment) (5) of the passenger-side air bag module, passenger-side knee air bag module, passenger-side side air bag module and passenger-side front pre-tensioner seat belt.

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