volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Repairs to CAN bus wiring > < Repairs to wiring harnesses

Up!

Notes on repairs to airbag and belt tensioner wiring
Notes on repairs to airbag and belt tensioner wiring
In addition to the general notes on repairs to wiring harnesses, the following instructions must be observed on how to repair wiring in airbag and belt tensioner systems:
  WARNING
t  Airbag and seat belt tensioner can fail.
t  Faulty repairs to the airbag and seat belt tensioning system can cause malfunctions in the passenger protection system.
t  For repairs to airbag and belt tensioner wiring harnesses, only contacts, connectors and wiring designed specifically for this purpose may be used → Electronic parts catalogue (ETKA).
  Note
t  Wires from airbag and belt tensioner wiring harness may only be repaired using wiring harness repair set -VAS 1978 B- and previous versions.
t  Observe the general notes on repairs to the vehicle electrical system → Chapter.
t  Observe vehicle stickers indicating high voltage components. Before carrying out repairs, discharge residual voltage → General body repairs, interior; Rep. gr.69.
   
t  For repairs to wiring in the airbag and belt tensioner system, a maximum of two positions may be repaired. The more the repairs there are in the wiring, the greater the resistance and this can trigger faults in the self-diagnosis of the system.
t  To avoid corrosion, the crimp connectors are always to be shrink-fitted when performing airbag or belt tensioner wiring harness repairs.
t  Do not incorporate the repaired wiring back in the vehicle's own wiring harness and mark the area of repair clearly with yellow insulating tape.
  N97-10489
t  Repairs in the area of the airbag or belt tensioner should not be more than 30 cm from the next contact housing. Together with the yellow insulating tape, this gives a clear indication of repairs that have already been carried out.
t  The wires to the triggering units (airbags) are entwined as standard with a twine spacing of 20 mm ± 5. This spacing is assured for series production via industrial standard numbers for wiring pairs and it is essential that it is adhered to on the repair lengths of entwined wiring.
  N97-0231
t  During repairs, the wiring to the triggering units (airbags) must have the same length. When wires -1- and -2- are entwined, the twine spacing of A = 20 mm ± 5 must be adhered to without fail.
t  There must not be any section of wiring, for example in the vicinity of crimp connectors -arrow-, longer than B = 100 mm with the wires not twisted.
  N97-0261

Repairs to CAN bus wiring > < Repairs to wiring harnesses