Volkswagen Polo Service & Repair Manual: Airbag and Belt Tensioner Wire Repair Information
 Note
| Observe general notes for repairs on the vehicle electrical
system. Refer to
→ Chapter „Vehicle Electrical System, General Repair
Information“. |
| In addition to the general repairs on wiring harnesses, the
following methods and instructions must be observed for repairs
on airbag- and seat belt tensioner wires |
WARNING
| The airbag and seat belt tensioner system can fail. |
| Faulty repairs performed on airbag and seat belt
tensioner system can lead to malfunction in passenger
protection. |
| When performing repairs on airbag and seat belt
tensioner wiring harness, use only terminals, connectors
and wires designated for it. Refer to the Parts Catalog. |
|
Note
| Air bag wires and the safety belt tensioner wiring harness
may repaired only with the Wiring Harness Repair Set -VAS1978B-
and previous versions. |
| Observe general notes for repairs on the vehicle electrical
system. Refer to
→ Chapter „Vehicle Electrical System, General Repair
Information“. |
| Pay attention to decals designating high voltage components.
When performing repairs, the residual voltage must be
discharged. Refer to
→ Body Interior; Rep. Gr.69. |
|
|
|
| A maximum of two repairs may be performed when repairing
wires of airbag- and seat belt tensioner system. Repairs
increase the electrical resistance in the wire and may trigger
malfunctions in the system On Board Diagnostic (OBD). |
| When repairing wiring harness of airbag- and seat belt
tensioner system, the crimp connectors must always be
heat-shrunk to prevent corrosion. |
| Do not wrap the repair point again into the vehicle-specific
wiring harness and mark the repair point quite visibly with
yellow insulating tape. |
|
|
|
| Repairs in the area of the airbag or seat belt tensioner
should be performed a maximum of 30 cm from the next contact
housing. Together with the identification via yellow insulating
tape, this procedure makes it possible to obtain a quick
overview of previously performed repairs. |
| Wires to the deploying units (airbags) have a wire-twisting
with a length of lay of 20 mm ± 5 mm in series production. This
length of lay is guaranteed via the norm part numbers for wire
pairs in series production and must be observed strictly for the
repair lengths of twisted wires. |
|
|
|
| During repair work, wires to deploying units (airbags) must
have the same length. When twisting together wires
-1 and 2-, length of lay of
-A- = 20 mm ±5 must be strictly
observed. |
| While doing this, no section of the wire, for example, in
area of crimp connectors -arrow-,
may be greater than B = 100 mm without twisting of the wires. |
|
|
|
Unshielded two-strand wiring -1-
and -2- with a cross section of
0.35 mm2 or 0.5 mm2
can be used as CAN bus wiring.
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Checklist
Observe the following information both before and during every journey
to ensure your own safety, and the safety of all passengers and other road users
:
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CAN Bus Wires, Repairing