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SUPPLEMENTARY RESTRAINT SYSTEM (SRS)
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1.7.2.3. AIR BAGS
A. DRIVER AIR BAG (DAB)
The driver airbag module is located in the steering
wheel and the SRS ECU controls its function. A
bag within the module inflates to protect the driver
in the event of a collision severe enough to deploy
the system.
The driver airbag module connects to the steering
column wiring harness via a rotary coupler called
as clock spring. Within the driver airbag module is
a squib which, when given the correct current by
the SRS ECU, inflates the airbag by initiating a
chemical reaction. In deployment, the airbag
inflates within a fraction of a second and then
deflate at a controlled rate as the driver body
regions; typically head and chest interact with
airbag. Vents in the airbag control its deflation.
The SRS ECU regularly applies a test current to
the driver airbag squib to confirm continuity of the
ignition circuitry.
ON VEHICLE SERVICE
!! WARNING
Always work on the air bag module from the side.
Always carry the module with the cover side
uppermost or away from the body in case being
carried vertically. Do not attempt to repair, open or
apply power (Multimeter) to the air bag module
terminals.
! CAUTION
Disconnect the battery negative lead.
REMOVAL
1. Disconnect the battery connections.
2. Rotate steering wheel in 90-degree clockwise
direction, insert screw driver from bottom cover
to disengage DAB snap, rotate steering wheel
in 90-degree anticlockwise direction, insert
screw driver from bottom cover to disengage
DAB 2nd snap.
3. Disconnect the DAB connector coming from
clock spring and disconnect the horn pad
connection and take out the DAB assembly
from the vehicle.
FITMENT
Follow reverse procedure for fitment.
! CAUTION
We need to press fit the airbag and it is to be
insure that it is fitted properly.
NOTE
After fitment connect the diagnostic tool and clear
all fault codes if any.