Geely EC715 2009, Workshop Manual

Page: 1402 / 2181

9.2.2 Description and Operation
9.2.2.1 Description and Operation
Note
Airbag system is unable to replace the seat belt
functions. If seat belts are not used, when the airbag is
deployed, it may cause serious personal injury. Geely
Automotive reminds you to wear and tighten your seat
belts. Only when seat belts are tighten, during a collision
system, airbag can provide supplementary protection for
the occupants.
Airbag System Description
Airbag system consists of the following components:
– Airbag Warning Lamp
–
Instrument Cluster
– Airbag Control Module Front Collision Sensor (Left / Right)
– Driver Side Collision Sensor
– Passenger Side Collision Sensor
– Passenger Recognition Sensor
–
Driver Front Airbag
– Passenger Side Airbag
– Driver Seat Belt Pretensioner
– Passenger Seat Belt Pretensioner
– Driver Side Airbag
–
Passenger Side Airbag
– Driver Curtain Airbag
– Passenger Curtain Airbag
– Inflator Module Coil
– Airbag System Wiring Harness
–
Steering Wheel and Steering Column
Beside seat belts, airbag system provides additional protection
to passengers and it is a passive safety system. Airbag system
includes multiple inflatable protection module, distributed in
different locations of vehicles, including steering wheel,
instrument units, front seat back, the roof rails. In addition to
inflatable protection module, the vehicle can be equipped with
seat belt pretensioner. When a collision occurs, it will fasten
seat belts, inflatable the module, at the same time increase the
distance between passenger and airbag. Each inflatable
module has a detonating circuit, controlled by the airbag control
module. When the airbag control module detects the collision
impact is large enough, it deploys the airbag. Airbag control
module continuously monitors the airbag system electrical
components. When a circuit failure is detected, the airbag
control module will set a DTC code and turn on airbag warning
lamps to inform the driver. The steering column has adopted
energy-absorbing design. In the event of frontal impact, it will
contract, reducing the risk of driver injury.
Airbag control module receives the sensor signals to determine
the severity of the collision. When the signal value is greater
than the memory settings, airbag ignition control module
commands to start the corresponding inflatable airbag system
modules. When confronted with a large enough collision, front
airbags and seat belt pretensioners will be activated; When
confronted with a large enough side collision, side airbags,
curtain airbags and seat belt pretensioners will be activated.
When airbag control module confirms the collision signal, it will
send "collision unlock doors and stop fuel supply" signal to the
bus within 20 ms, a total of 30 cycles (100 ms a cycle, a total
of 3 s) . When BCM and EMS receive more than three
consecutive signals, respectively, unlocking doors and
stopping fuel supply will be implemented.
9-4 Airbag System Safety Protection Device
EC718/EC718RV EC715/EC715RV 10/2009