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1. CAUTIONS FOR AIR BAG OPERATION
1.
When there is any deployed air bag (including seat belt pretensioner), the air bag unit should
be replaced. Any DTC (Diagnostic Trouble Code) in the air bag unit should not be cleared
since the unit has data for status when the air bag was deployed as well as information
related to the air bag deployment.
2.
Note that the used components related to the air bag, especially the air bag unit, should be
packaged in an air tight container to prevent any damage.
3.
Do not connect a tester to any connector or component to check supply voltage or
resistance of air bag related components. The detonator may explode due to a sudden extra
power supplied by the tester.
4.
Before removing or installing any air bag related components, disconnect the negative battery
cable.
Collision sensors, a kind of impact G (acceleration) sensor, detect the lateral and longitudinal
collisions and determine whether or not to deploy air bags. The roles of each collision sensor are
as follows:
Front G sensors (inside the air bag unit)
Send signals to the front air bags (driver and passenger air bags) and the driver's and front
passenger's seat belt pretensioners. When the front collision G sensor sends out only the air
bag deployment signal, the signal deploys the two front air bags and activates their seat belt
pretensioners.
Once an air bag deploys, its repair parts vary according to the deployment situation and damage
to the vehicle from collision. Needed repairs also slightly vary between the front air bags and the
curtain air bags. The following are the differences:
Replacement parts when the front air bags deploy:
Air bag unit and its wiring (including connector), seat belt pretensioner and its wiring
(including connector), whole front air bags, instrument panel (IP)
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Troubleshooting
