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Volkswagen Golf Service & Repair Manual: Renewing pyrotechnic, electrical and mechanical components of the restraint system after an accident

Volkswagen Golf Service & Repair Manual / General body repairs, interior / Technical data / Safety information / Renewing pyrotechnic, electrical and mechanical components of the restraint system after an accident

Special tools and workshop equipment required
  Vehicle diagnostic tester
  Note
  •   The airbag control unit can be used for up to 2 side airbag and/or belt tensioner deployments with the airbag generation 8.* »not 8.R«.
  •   The airbag control unit can be used for up to 2 deployments of side airbag/driver airbag/front passenger airbag and/or belt tensioner with the airbag generation 9.*, 10.* and 8.R.
  •   After the third deployment, the error message “Control unit faulty” is displayed.
The airbag control unit must be renewed:
  •   In the event of a driver/front passenger airbag deployment “though not for airbag generation 9.*, 10.* and 8.R ” → Anchor
  •   After 3 deployments of side airbag/driver airbag/front passenger airbag and/or belt tensioner
  •   In the event of damage to the housing
  •   In the event of a deformation to the tunnel within a 200 mm radius of the control unit
Always renew the following:
  •   All triggered airbag units.
  •   Battery isolation igniter -N253-
Additionally, in the event of the front passenger airbag being triggered:
  •   Dash panel
  •   Supports of front passenger airbag unit which have been bent out of shape (must not be bent back into shape)
  •   All sensors for front airbag at front end
  •   Remaining sensors for lateral acceleration in event of deformation of attachment points in vicinity of sensors
Additionally, in the event of the driver airbag being triggered:
  •   Return spring with slip ring
  •   All sensors for front airbag at front end
  •   Remaining sensors for lateral acceleration in event of deformation of attachment points in vicinity of sensors
Additionally, in the event of the side airbag being triggered:
  •   Pressure sensors on the triggered side
  •   Lateral acceleration sensors on the side affected
  •   Seat cover
  •   Padding
  •   In case of foldable backrest: side padding (if fitted)
  •   Remaining sensors for lateral acceleration in event of deformation of attachment points in vicinity of sensors
Additionally:
  •   All belt inertia reels with triggered belt tensioners
  •   All belt inertia reels with triggered belt tensioners
  •   Belt buckles for all belt inertia reels with triggered belt tensioners and seat belt engaged
  •   Belt height adjuster (mechanical and electrical) for all belt inertia reels with triggered belt tensioners and seat belt engaged
–  If you suspect that belt tensioners or belt force limiters have been triggered, connect a vehicle diagnostic tester.
–  Under “15 - Airbag” in »Guided Fault Finding« check whether there is a crash entry logged for the airbag control unit.
–  At the same time check whether the “Resistance too high” fault is also logged for belt tensioners and/or belt force limiters. Triggered belt tensioners and/or belt force limiters have to meet both conditions. “Prerequisite: The airbag control unit has not yet been renewed”.
  Note
  •   The “Resistance too high” fault can also be logged in the event of a cable break. Under normal circumstances, no crash entry is then logged.
  •   Depending on the crash intensity, it is possible that the belt tensioner was triggered but »NOT« the belt force limiter. Observe notes on disposal of pyrotechnic components → Chapter.
  •   In addition, note the section: Checking seat belts → Chapter.
   
  Deployed belt force limiters can be identified by the following features:
  The pin -1- and lug -3- have popped out of the belt force limiter housing on the belt inertia reel.
  The strap -2- is no longer vertical but is pointing diagonally outwards.
–  If parts of the belt system are removed because of an accident, the belt system bolts must be renewed.
–  In addition, the following must also be replaced if necessary (visual check): all damaged components.
–  After renewing the airbag units or the control unit, affix stickers (only tear-off strips) to the registration card and return the registration card to the responsible Sales Centre or to the Importer for registration.
   

Renewing pyrotechnic, electrical and mechanical components of the restraint system after an accident

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