Volkswagen Golf Service & Repair Manual: 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
| Airbag and seat belt tensioner can fail. |
| Faulty repairs to the airbag and seat belt
tensioning system can cause malfunctions in the
passenger protection system. |
| 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
| Wires from airbag and belt tensioner wiring harness may only
be repaired using wiring harness repair set -VAS 1978 B- and
previous versions. |
| Observe the general notes on repairs to the vehicle
electrical system
→ Chapter. |
| Observe vehicle stickers indicating high voltage components.
Before carrying out repairs, discharge residual voltage
→ General body repairs, interior; Rep. gr.69. |
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| 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. |
| To avoid corrosion, the crimp connectors are always to be
shrink-fitted when performing airbag or belt tensioner wiring
harness repairs. |
| 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. |
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| 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. |
| 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. |
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| 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. |
| There may 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. |
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Crimping pliers -VAS 1978/1A- or crimping pliers (base tool)
-VAS 1978/1-2- together with head adapter 0.35 - 2.5 mmІ -VAS
1978/1-1- or head adapter 4 ...
An unshielded two-wire line -1-
and -2- with a cross section of
0.35 mm2 or 0.5 mm2
is used for CAN bus wiring.
The col ...
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Crimping pliers -VAS 1978/1A
Repairs to CAN bus wiring