Notes on repairs to airbag and belt tensioner wiring — VW

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 system and belt tensioners:
WARNING
The airbag system and belt tensioner may fail.
Faulty repairs to the airbag and seat belt tensioning system can cause malfunctions in the passenger protection system.
For repair work on airbag and seat belt tensioner wiring harnesses, only contacts, connectors and wiring designed specifically for this purpose may be used
Electronic Parts Catalogue
.
Repairs to the airbag system and belt tensioner wiring must only be carried out using
wiring harness repair set
VAS 1978
/
wiring harness repair set
VAS 1978A
/
wiring harness repair set
VAS 1978 B
.
Observe vehicle stickers indicating high voltage components. Discharge residual voltage before performing any repairs
Rep. gr.
00
Safety instructions; Safety precautions when working on pyrotechnic components
.
For repairs to wiring in the airbag system and belt tensioner, a maximum of 2 repairs may be performed. 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.
To avoid corrosion, the crimp connectors must always be shrink-fitted when performing airbag or belt tensioner wiring harness repairs.
Only use yellow wires for repairs to wiring harnesses.
Do not wrap the repair position in vehicle's own wiring harness and mark the repair position with yellow insulating tape to make it clearly visible.
Repairs in the area of the airbag or belt tensioner should not be conducted more than 30 cm from the next connector housing. Together with the yellow insulating tape, this gives a clear indication of repairs that have already been carried out.
In series production, the wires leading to the trip units (airbags) are twisted with a length of lay of 20 mm ± 5 mm. This length of lay is ensured in series production by means of standard-part numbers for pairs of wires and must be adhered to under all circumstances when sections of twisted wires are repaired.
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 mm must be adhered to without fail.
It must be ensured that no part of the wiring, including wiring in the vicinity of crimp connectors
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, is longer than B = 100 mm without the wires being twisted.