SRC-10
< SYSTEM DESCRIPTION >
[FOR USA AND CANADA]
SRS AIR BAG SYSTEM
SYSTEM DESCRIPTION
SRS AIR BAG SYSTEM
System Diagram
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System Description
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Supplemental Restraint System (SRS) activates air bag module and seal belt pre-tensioner when it detects a
frontal collision or a side collision that is more than the specified limit. Together with other safety devices, it
reduces the impact that occupant receives when vehicle collision occurs.
Air bag sensor unit supplies power supply to air bag module and pre-tensioner seat belt when deceleration
that is more than the specified limit is detected by G sensor in air bag diagnosis sensor unit, crash zone sen-
sor, or satellite sensor. Air bag module is composed of electric igniter (squib), filter, pyrotechnic material, and
gas generating material. When air bag module receives a signal from air bag sensor unit, air bag module
ignites pyrotechnic material using electric igniter (squib) so that gas generating material generates high tem-
perature nitrogen gas. The gas through filter activates air bag and seat belt pre-tensioner.
AIR BAG DIAGNOSIS SENSOR UNIT FUNCTIONS
Air bag diagnosis sensor unit has the following functions.
• Detects a collision and supplies the energy for deploying air bag and seat belt pre-tensioner.
• Detects and records electrical malfunction in air bag system and seat belt pre-tensioner system, and blinking
air bag warning lamp.
• Detects and records the deployment of air bag and seat belt pre-tensioner, and turns ON air bag warning
lamp.
JMHIA1410GB