| General notes on repair work on the electrical system of the
vehicle |
Caution | To turn the battery on and off, it is essential that the procedures
described in the repair manual of the respective vehicle be followed
to the letter. |
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WARNING | Some tools have a safety lock that should be inserted into
the ends of the tool before it is used in order to prevent damage
to the tool and to protect the mechanic from any injury. |
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| Whenever repair work is carried out, consult current information
in the respective Repair Manuals |
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| Follow the current specific norms of each country. |
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| Before working on the electrical system, it is necessary to
disconnect the battery earth strap. |
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| Safe working conditions regarding the electrical system are
created when the earth strap is disconnected from the battery (current
interruption). |
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| The positive cable only needs to be disconnected when removing
the battery. |
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| Before initiating any repair work, potential causes of faults
must be eliminated (for example sharp elements on the vehicle body,
defective components, corrosion, etc). |
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| Welding work must not be carried out on the on-board system. |
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| Repairs to the harnesses and terminals must only be carried
out with the Harness repair set -VAS 1978-. |
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| Repairs to harnesses should only be carried out with yellow
cables. |
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| Repairs to harnesses should not be reintegrated into the lining
of the original harness of the vehicle. They should be identified
with a yellow adhesive tape. |
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| These yellow cables and all locations identified with the yellow
tape indicate previous repairs |
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| Pressure connections must not be repaired. After compression,
place a cable in parallel with the damaged cable. |
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| After compression, carry out retraction of the pressure connection
with a hot air blower in order to prevent entry of humidity. |
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| Carefully observe the complementary notes regarding repair
work on the airbag cables and the pre-tensioners of the seat belts,
CAN-Bus system cables, antenna cables and cables with transversal
section areas of up to 0.35 mm2 → Chapter. |
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| Avoid releasing earth cables from the vehicle body (risk of
corrosion). |
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| After each repair, carry out a test run. If necessary, consult
and erase the fault memory and/or initialize or carry out and adjustment
to the systems. |
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