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Repairing CAN bus cables > < Instructions for the repair of wiring harnesses

Leon Mk2

Repair of airbag and seat belt pretensor cables
Repair of airbag and seat belt pretensor cables
Together with the wiring harness general repair, for the repairs of the belt pretensioners and airbag system wiring harnesses take into account the following instructions:
  WARNING
t  Airbag systems and seatbelt tensioners can be damaged.
t  If the cable harness of the airbag and seatbelt pretensors is not correctly repaired, this may damage the working of the passenger protection systems.
t  When repairing the cable harness of the airbag and the pretensing of the seatbelts, only use the contacts, connectors and cables supplied for this → Parts catalogue (ETKA).
  Note
t  Repair the air bag cables and seat belt tension devices using only the cable harness repair kit -VAS 1978 B-.
t  Observe the stickers in the vehicle warning about components exposed to high voltages. When repairing, the residual voltage must be removed → Bodywork- interior installation work; Rep. gr.69.
   
t  In the wiring harnesses for the airbags and belt pretensioners you can only perform two repair points. Repair points increase the electrical resistance of the cable and may cause self-diagnosis faults in the system.
t  In repairs to the airbag and seatbelt pretension harnesses, the crimped connections must be shrink wrapped to avoid the risk of corrosion.
t  Repairs to the wire harness can only be carried out with yellow wires.
t  Do not tape again the repaired point in the proper vehicle wiring harness and identify the repair point in a clear manner with yellow isolating tape.
  N97-10489
t  The repair points around an airbag or seatbelt must be at least 30 cm away from the next plug casing. In this way, and due to the yellow insulating tape, repairs that have been carried out before are quickly recognised.
t  The wiring leading to the trigger units (airbags) is twisted in series at intervals of 20 mm ±5. This interval is guaranteed in series production using standardised wrenches for cable pairs and must be observed in the repair sections for twisted cables.
  N97-0231
t  When performing repair work, the wires to the igniter units (airbag) should have the same length. When twisting the cables -1- and -2- the distance A = 20 mm ±5 must be maintained in all cases.
t  No lengths should be of more than B=100mm long without twisting, for example, in the area of welded connections -arrow-.
  N97-0261

Repairing CAN bus cables > < Instructions for the repair of wiring harnesses