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Nissan Quest E52. Manual - part 1120
COMPONENT PARTS
SRC-9
< SYSTEM DESCRIPTION >
C
D
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SRC
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P
No.
Component
Function
1.
Driver air bag module
• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of frontal collision where acceleration is more than the specified level,
the ignition materials are ignited by electric ignition system. The system burns
the gas generating materials resulting in a chemical reaction. This generates
hot gases that flow into the air bag through a filter and expand the bag.
2.
Combination switch (spiral cable)
Supplies power supply to driver air bag module on steering wheel.
3.
Combination meter (air bag warning
lamp)
Indicates air bag malfunctioning and deployment by blinking and illuminating air
bag warning lamp.
4.
Passenger air bag OFF indicator
Indicates whether or not passenger air bag is in the activation mode based on
the judgement of occupant detection system.
5.
Passenger air bag module
• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of frontal collision where acceleration is more than the specified level,
the ignition materials are ignited by electric ignition system. The system burns
the gas generating materials resulting in a chemical reaction. This generates
hot gases that flow into the air bag through a filter and expand the bag.
6.
BCM
Receive the collision detection signal when air bag diagnosis sensor unit detects
collision.
Refer to
BCS-4, "BODY CONTROL SYSTEM : Component Parts Location"
for
detailed installation location.
7.
Crash zone sensor
• Transmits signal to air bag diagnosis sensor unit when a frontal collision oc-
curs.
• Crash zone sensor is a G sensor that outputs voltage signal during decelera-
tion at the time of a vehicle frontal collision that is more than the specified limit
is detected.
8.
Air bag diagnosis sensor unit
• Detects a collision and supplies power supply for deployment to air bag mod-
ule and pre-tensioner seat belt.
• It contains the “G” sensors for both frontal and side collisions and spare battery
function in case of main battery damage in collision.
9.
Front door satellite sensor LH
• Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
• When air bag diagnosis sensor unit defines both signal voltage of the “G” sen-
sor, pressure sensor and the safing algorithm to be that of collision which is
more than the specified level, the driving circuit switches on and feeds the
electric ignitor of both the side air bag, curtain air bag and pre-tensioner.
10.
Seat belt pre-tensioner LH
• Receives signal from air bag diagnosis sensor unit and deploys seat belt pre-
tensioner.
• In the case of a frontal collision or side collision or roll over that exceeds spec-
ified impact level, the air bag diagnosis sensor unit detects the deceleration
caused by collision. It restrains the passenger with seat belt easing the stress
on passengers chest with load limiter.
11.
Front satellite sensor LH
• Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
• When air bag diagnosis sensor unit defines both signal voltage of the “G” sen-
sor, and the safing algorithm to be that of collision which is more than the spec-
ified level, the driving circuit switches on and feeds the electric ignitor of both
the side air bag and curtain air bag and seat belt pre-tensioner.
12.
Rear satellite sensor LH
• Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
• When air bag diagnosis sensor unit defines both signal voltage of the “G” sen-
sor, and the safing algorithm to be that of collision which is more than the spec-
ified level, the driving circuit switches on and feeds the electric ignitor of both
the side air bag and curtain air bag and seat belt pre-tensioner.
13.
Seat belt buckle switch LH
Controls deployment timing depending on the seat belt condition that is fastened
or unfastened.
14.
Side air bag module LH
• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of side collision where acceleration is more than the specified level, the
ignition materials are ignited by electric ignition system. The system burns the
gas generating materials resulting in a chemical reaction. This generates hot
gases that flow into the air bag through a filter and expand the bag.