Volkswagen Golf Service & Repair Manual: Safety measures when working with pyrotechnic components
| Safety measures when working with
pyrotechnic components |
 Note
| The following are pyrotechnic components: |
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Belt force limiters (depending on vehicle equipment
level) |
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Battery isolation elements (depending on vehicle
equipment level) |
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Testing, removing, installing and repair work may only
be performed by qualified personnel. |
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There are no replacement intervals for airbag units. |
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Under no circumstances should checks be carried out with
a test lamp, voltmeter or ohmmeter. |
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Pyrotechnic components may only be checked in installed
state and with vehicle diagnosis, testing and information
systems approved by the manufacturer. |
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When working on pyrotechnic components and airbag
control unit -J234-, battery earth strap must be
disconnected with ignition switched ON. Then cover negative
terminal. |
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A waiting time of 10 seconds is necessary after
disconnecting the battery. |
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The battery must be connected with the ignition SWITCHED
ON. When doing this, there should be no-one inside the
vehicle. |
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If the ignition has not yet been switched on after the
battery has been reconnected “warning lamps in dash panel
insert are off”, the ignition (key or button) must only be
switched on while sitting on the driver seat and with the
seat set to rearmost position. |
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Observe required procedures after connecting battery
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Before handling pyrotechnic components of the restraint
system, for example before separating an electrical
connection, the mechanic must electrostatically discharge
himself/herself. Electrostatic discharge is achieved by
touching earthed metallic parts, such as the door striker
plate. |
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Wash hands after coming into contact with triggered
pyrotechnic components of restraint system. |
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Pyrotechnic components must not be opened or repaired;
always use new parts (risk of injury). |
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Pyrotechnic components that have been dropped onto a
hard surface or show signs of damage must not be installed
in a vehicle. |
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Pyrotechnic components must be installed immediately
after they have been removed from their packaging. |
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If work is interrupted, the pyrotechnic component must
be stored back in its packaging. |
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Leaving the pyrotechnic component unattended is
prohibited. |
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When connecting pyrotechnic components of the restraint
system, only the person carrying out the work may be inside
the vehicle. |
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Pyrotechnic components must not come into contact with
grease, cleaning solution or similar. |
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The airbag unit must be renewed if any contamination
such as oil, grease, paint or solvent penetrates the fabric. |
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Pyrotechnic components must not be subjected to
temperatures above 100°C even for short periods. |
| Special instructions for driver and front passenger airbags |
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- Removed driver and front passenger airbag units must be
stored with padded side upwards.
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| It is essential to carry out work in the following sequence
when renewing airbag units: |
| 1 - |
Remove old airbag unit and place to one side with padded
side upwards. |
| 2 - |
Remove new airbag unit from transport packaging and place to
one side with padded side upwards. |
| 3 - |
Immediately place old airbag unit in transport packaging. |
| 4 - |
Install new airbag unit in vehicle. |
| Special instructions for belt tensioners |
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Belt tensioner units must be handled with extreme
caution during removal and installation. If handled
incorrectly, there is a high risk of injury and damage in
relation to the belt tensioner units. |
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Belt tensioner units which are mechanically damaged
(dents, fractures) always must be renewed. |
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Never point open end of belt tensioner at another
person. |
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When connecting the belt tensioner unit, all mechanical
parts (including those of the 3-point seat belt) must be
properly attached. If connection of the belt tensioner unit
is hindered due to tight conditions, the belt strap must be
rolled up completely before connecting. In this case there
is no heightened risk of safety as long as the additional
safety instructions are heeded. Essentially this is aimed at
battery disconnection and electrostatic discharge of the
fitter prior to connection of the belt tensioner unit. |
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Depending on the crash intensity, it is possible that
the belt tensioner was triggered but the belt force limiter
did NOT ignite. These parts are to be treated as unignited
components! |
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Observe the following when working on vehicles with a
Start/Stop system:
WARNING
Risk of injury due t ...
Storage must comply with the relevant national legislation.
Transportation is subject to national and international
regulati ...
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Safety measures when working on vehicles with a Start/Stop system
Storage, transportation and disposal of airbag, belt tensioner and battery
isolator units (pyrotechnic components)