The supplemental
restraint system (SRS) is designed to supplement the seat belt to help
reduce the risk or severity of injury to the driver and passenger by
activating and deploying the driver, passenger, side airbag and belt
pretensioner in certain frontal or side collisions.
The SRS (Airbag)
consists of : a driver side airbag module located in the center of the
steering wheel, which contains the folded cushion and an inflator unit ; a
passenger side airbag module located in the passenger side crash pad
contains the folded cushion assembled with inflator unit ; side airbag
modules located in the front seat contain the folded cushion and an
inflator unit ; curtain airbag modules located inside of the headliner
which contains folded cushions and inflator units. The impact sensing
function of the SRSCM is carried out by electronic accelerometer that
continuously measure the vehicle's acceleration and delivers a
corresponding signal through amplifying and filtering circuitry to the
microprocessor.
SRSCM
(SRS Control Module)
SRSCM will detect
front impact with front impact sensor, and side impact with side impact
sensor, and determine airbag module deployment.
| 1. |
Self diagnosis: SRSCM will constantly
monitor current SRS operation status and detect system failure while
vehicle power supply is on, system failure may be checked with
trouble codes using GDS. |
| 2. |
Airbag warning lamp on: Upon detecting
error, the module will transmit signal to AIRBAG warning lamp
located at cluster. AIRBAG warning lamp will indicate driver SRS
error. Upon ignition key on, AIRBAG warning lamp will turn on for
about six seconds. |
| 3. |
Trouble code registration: Upon error
occurrence in system, SRSCM will store DTC corresponding to the
error. DTC can be cleared only by GDS. However, if an internal fault
code is logged or if a crash is recorded the fault clearing should
not happen. |
| 4. |
Self diagnostic connector: Data stored in
SRSCM memory will be output to GDS or other external output devices
through connector located below driver side crash
pad. |
| 5. |
Once airbag is deployed, SRSCM should not be
used again but replaced. |
| 6. |
SRSCM will detect whether passenger put on
seat belt by the signal from built-in switch in seat belt buckle,
and deploy front seat airbag at each set crash
speed. |
| 7. |
Side airbag deployment will be determined by
SRSCM that will detect satellite sensor impact signal upon side
crash, irrespective to seat belt
condition. |
