Airbag Disarming/Arming Procedures - Aston Martin DB7 Workshop Manual

Electrics
Airbag System
^2?
6.4.21.4 Airbag Disarming/Arming
Procedures
WARNINGS AND CAUTIONS:
WARNINGS:
Disarm the airbags by disconnecting the battery
ground (black) lead, waiting one minute and then
removing the airbag modules before servicing of
any airbag or steering column component.
After disconnecting the battery ground lead, allow
a minimum of one minute delay for the back-up
power supply to discharge before servicing the
airbag system.
The system components are non-serviceable, if
faults are suspected, change components for new
items only.
Failure to observe the above procedures may
result in accidental deployment of the airbags.
Always wear safety glasses when working on airbag
equipped vehicles.
Personnel carrying an airbag module must ensure
that the module and trim cover are pointing away
from the body. When positioning on a bench or
work surface, ensure that the airbag module and
trim cover face upwards to limit motion on
accidental deployment.
Always wear gloves when handling deployed airbag
modules. Deposits of sodium hydroxide may be
presenton the module surface. If sodium hydroxide
contacts any area of the skin, wash the affected
area immediately with mild soap and water.
Dispose of the deployed airbag using the correct
procedures referred to in this section.
Cautions:
When scrapping vehicles, ensure that the airbags have
been deployed (see Scrapping Vehicles with Live Airbags).
If a component has been renewed and the fault does not
clear, refit the original item and repeat the diagnostic
procedure.
After servicing, repeatthe diagnostic procedures to ensure
correct system operation.
Renew the airbag module if the surrounding trim panels
are damaged. Do not attempt to repaint trim covers as
paint may damage cover material.
Disarming the Airbags
3.
4.
WARNING: Carry out the following disarming
procedure before attempting any work on the
vehicles electrical systems.
Note: The battery ground (black) lead must be
disconnected within 12 seconds of switching off the
ignition to avoid the alarm siren sounding.
Disconnect the battery ground lead. Allow a
minimum of one minute delay for the back-up
power supply to discharge.
Remove the drivers side airbag module and replace
it with an airbag simulatorfrom the simulator kit (Pt
No. 43.27028).
Remove the passengers airbag module and replace
it with an airbag simulator from the simulator kit.
Reconnect the battery ground.
Rearming the Airbags
WARNING: Carry out the following procedure to
rearm and check the airbags after completing all
work on the vehicles electrical systems.
Note: The vehicle battery must be disconnected within
12 seconds of switching off the ignition to avoid the alarm
siren sounding.
^. Disconnect the battery ground lead. Allow a
minimum of one minute delay for the back-up
power supply to discharge.
2. Removethedriverssideairbagsimulatorand replace
it with the drivers airbag module. Secure the airbag
module with the two captive torx screws.
3. Remove the passengers side airbag simulator and
replace it with the passenger side airbag module.
Secure the module with four nuts and washers.
Close the passenger side airbag door.
4. Reconnect the battery ground.
5. Switch on the ignition and check for correct
indications from the SRS/AIRBAG warning light.
TheSRS/AIRBAC lamp should come on after a brief
delay and remain on for approximately six seconds
during the airbag system self check. The lamp will
extinguish upon satisfactory completion of the self
check, or will flash a diagnostic code if an airbag
system fault is detected. Continuous illumination of
the w a r n i n g lamp may indicate a seatbelt
pretensioner fault
Note: Reset the clock and window ECUs on completion.
6-80
September 1996