The following components of the air bag systems are monitored by a diagnostic system:
• Crash sensors, and diagnostic module (SAS
unit)
• Front air bag sensors
• Air bag modules
• Side crash sensors
• Air bag/Front seat belt pretensioner system
warning light
• Front seat belt pretensioners
• Related wiring
(With Driver and Front Passenger Occupant Classification System)
• Front passenger air bag deactivation indicator
light
• Driver seat slide position sensor
• Front passenger seat weight sensors
• Front passenger seat weight sensor control
module
• Front passenger seat belt buckle switches
The diagnostic module continuously monitors the system's readiness. This begins when the ignition is switched ON and continues while the vehicle is being driven.
Driver and Front Passenger Occupant Classification System
Before DrivingPositive Crankcase Ventilation (PCV) System
Purpose, Outline
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
The intake manifold vacuum introduces blow-by gas to the intake manifold
via the PCV valve and the ventilation hose.
System Diagram
Structure
The positive crankcase ventilation sys ...
Air Bag System Warning Alarm [Two Step Deployment Control System]
Purpose
The air bag system warning alarm notifies the driver that a malfunction occurred
in the air bag system instead of the air bag system warning light.
Function
If a malfunction occurs in the air bag system while the air bag system warning
light cannot illuminate, the a ...
Pre Tensioner Seat Belt [Two Step Deployment Control System]
Purpose
The pre-tensioner seat belt retracts and tightens the seat belt webbing to
protect the front passengers during a collision.
Function
The pre-tensioner seat belts operate (deploy) based on the operation signal
from the SAS control module to instantly retract and tigh ...