SSANGYONG RODIUS 2004.09 Manual page 73

3) CIRCUIT DESCRIPTION
(1) FRONT AIRBAG OPERATION (DRIVER'S AND PASSENGER's)
A. The air bag inflates when:
Frontal impact against a solid concrete wall at over 25 km/h or near-frontal impact within 30
degrees from the center of the vehicle at both corners
B. The air bag can inflate when:
Underbody impact from the road surface; impact against the curb at a very high speed;
dropping impact onto the road surface with a large angle
C. The air bag does not inflate when:
Rollover, side impact or rear impact
D. The air bag seldom inflates when:
- Oblique impact, rollover
-
Weak impact in which the sensor is unable to detect (under the inflation requirements)
- Impact against narrow objects such as a telegraph pole or a tree
- The vehicle falls into a drainage or a puddle
- The front of the vehicle crashes into high impact point vehicle such as a truck
- Impact on the hood by falling stones
-
The air bag warning lamp is on
(2) SDM (SENSING AND DIAGNOSTIC MODULE)
- The airbag system consists of the module section (driver, passenger and side), seat belt
section and SDM.
- The SDM has no user-serviceable parts and monitors the system components
continuously. The SDM also records any faults which are discovered.
- The SDM allows the fault codes to be retrieved with a scan tool and illuminates a warning
lamp that alerts the driver to any faults.
(3) AIRBAG WARNING LAMP
The instrument cluster contains an airbag warning indicator bulb to verify the operation of the
AIRBAG indicator and sensing and diagnostic module (SDM).
The SDM performs a turn-on test when the ignition is turned ON. The SDM flashes the
AIRBAG indicator six times by supplying an intermittent ground to the indicator lamp circuit.
After flashing six times, the AIRBAG indicator will turn off if no more malfunctions have been
detected.
(4) ACCELEROMETER SENSOR
The accelerometer sensor electronically represents the acceleration or deceleration of the
vehicle during a frontal impact.
In this electronic representation, the electrical signal is proportional to the acceleration or
deceleration of the vehicle.
(5) MODULE COVER/HOUSING
- It is a type of a container that includes the cushion and the inflator.
- The module housing functions to deliver the reaction force between the body structure
and the airbag (The airbag
reaction is absorbed generally to the steering wheel or instrument panel).
- The module cover must be considered in a viewpoint of protection between exterior,
internal units and cushion. Also the module cover should be designed not to cause any
personal injury for deployment.
(6) BELT PRETENSIONER
The belt pretensioner enables to retract the driver and the passenger seat belt webbing to
reduce any personal impact when accounted a frontal collision.
(7) CONTACT COIL
The contact coil is installed between the steering wheel and the steering column and
contains a coil that enables to contact electrically between the airbag wiring harness, the
driver airbag module and the horn switch.
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CIRCUIT
RODIUS 2004.09