The SRS (Airbag) consists of : a driver airbag module located in the center of the steering wheel, which contains
a folded cushion and an inflator unit ; a passenger airbag module located in the passenger side crash pad which
contains a folded cushion together with an inflator unit ; side airbag modules located in the driver and passenger
seat which contain folded cushions and inflator units; SRSCM located on the floor center console core which
monitors the system,; an accelerometer which senses vehicle deceleration,; a spring interconnection (clock
spring) located within the steering column; system wiring and wiring connectors; and a knee bolster located
under the steering column. The impact sensing function of the SRSCM is carried out by the electronic
accelerometer that continuously measures the vehicle's acceleration and delivers a corresponding signal through
an amplifying and filtering circuit to the microprocessor. Deployment of the airbag is designed to occur in frontal
or near-frontal side impacts of moderate to severe force.
Further, if a mistake is made in servicing the airbag system, it is possible that the airbag may fail to operate when
required.
The SRS airbag system has sophisticated electrical and electronic components. Therefore the airbag operating
components should be handled very carefully.
The SRSCM will deploy the airbag modules by sensing the frontal impact sensed by the sensor built in to the
SRSCM.
TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Restraint > General Information > General Information,
TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Restraint > General Information > General Information
GENERAL
CUSTOMER CAUTIONS
1. Be sure to proceed with airbag related service only after approx. 30 seconds or longer from the time the
ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the
battery. The airbag system is equipped with a back-up power source to assure the deployment of airbags
when the battery cable is disconneted during an accident. The back-uppower is available for approx. 150ms.
2. When the negative(-) terminal cable is disconnected from the battery, the clock and audio system's memory
will be wiped out. So before starting work, make a record of the contents of the audio system's memory. When
the work is finished, reset the audio system and adjust the clock.
3. Symptoms of malfunction of the airbag system are difficult to detect, so the diagnostic codes become the most
important source of information when troubleshooting.
4. When troubleshooting the airbag system, always inspect the diagnostic codes before disconnecting the
battery.
5. Never use airbag parts from another vehicle. When replacing parts, replace them with new parts.
6. Never attempt to disassemble and repair the airbag modules (DAB, PAB, SAB, BPT), clock spring and wiring
in order to reuse them.
7. If any component of SRS has been dropped, or if there are cracks, dents or other defects in the case, bracket
or connector, replace them with new ones.
8. After work on the airbag system is completed, perform the SRS SRI check. The airbag indicator lamp can be
triggered by faults in other circuit in some cases. Therefore if the airbag indicator lamp goes on, be sure to
erase the DTC codes using Hi-scan just after repairing or replacing the troubled parts,including the fuse.
9. Especially when carring out body welding, never fail to disconnect the battery's negative (-) terminal.
SRSCM
1. DC/DC convertor : The DC/DC converter in the power supply includes a step-up and a step-down converter,
which provides the firing voltage for four firing circuits and the internal operating voltage. If the internal
operatingvoltage falls below a defined threshold, a reset is executed.
2. Arming sensor/safing sensor : The arming/safing sensor built in to the airbag firing circuit has the function of
arming the airbag circuit under all required deployment conditions and maintaining the airbag firing circuits
unarmed under normal driving conditions. The safing sensor is a dual-contact electromechanical switch that
closes if it experiences a deceleration exceedinga specified threshold.
3. Back-up power : The SRSCM reserves an energy reserve to provide deployment energy for a short period
when the vehicle voltage is low or if lost in avehicle frontal crash.
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24.04.2008
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