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Repairing CAN bus wiring > < Notes on repairing wiring harnesses and electrical connectors

A1

Repairing wiring for pyrotechnic components
Repairing wiring for pyrotechnic components
  Note
t  Observe general information on repairs to the vehicle electrical system → Chapter.
t  Observe notes on repairing wiring harnesses and connectors → Chapter including marking repair locations.
  WARNING
Carrying out repair work to wiring for pyrotechnic components incorrectly (for example on airbags, belt tensioners) will cause a malfunction in passenger protection systems.
t  To maintain the repair standards required by the Audi factory, repairs to wiring for pyrotechnic components may only be performed on the in-vehicle wiring using wiring harness repair set -VAS 1978 B- and genuine replacement parts (connector housings, contacts, wiring).
t  Wires on the individual airbag units must NOT be repaired.
t  If wires or connectors on airbag units are damaged, the corresponding airbag units must be renewed for safety reasons.
t  Do not repair wiring for pyrotechnic components at more than two repair locations. Repair locations increase the resistance in wiring and can be the cause of faults in the system's self-diagnosis.
t  Repairs in the area around pyrotechnic components should not be performed more than 30 cm from the nearest connector housing. This procedure and the marking with the yellow adhesive tape ensure that previous repairs can be easily identified.
   
t  The two wires going to the airbag igniters have a twist length specification of 20 ± 5 mm. This twist length must always be observed when repairing twisted wires.
t  When performing repair work, both wires to the airbag igniters must be of the same length. When twisting the wires -1 and 2-, the twist length specification -A- = 20 mm must be met.
t  When making repairs, there must be no untwisted section of wire which is longer than -B- = 100 mm, e.g. in the vicinity of crimp connectors -arrow-.
t  Repair operations must be recorded in the Audi Service Schedule under „Workshop entries“ with a brief outline of the repair work completed, company stamp and signature.
t  Any warranty claims made under the AUDI AG factory warranty are invalid if airbag wiring harness repairs have not been performed using genuine replacement parts and wiring harness repair set -VAS 1978 B-.
  N97-0261

Repairing CAN bus wiring > < Notes on repairing wiring harnesses and electrical connectors