Servicing and cleaning
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Service procedures
8.6.1 General guidelines for handling electronic components
NOTICE
Neglecting these recommendations will result in loss of warranty.
Working on vehicles fitted with electronic devices
Installation and measurement of electronic devices.
► Ensure power is switched off before working on electrical parts (except
when measuring).
► Switch off battery main switch (service switch) or disconnect bat-
tery.
Vehicles pick up electrostatic charge from the ground. If you are working
from the ground, first carry out a potential equalisation.
Remedy:
► Mount an earthing strap made of conductive rubber on the vehicle.
► Connect water filled or wet hose.
► Grip conductive vehicle frame parts before touching electrical equip-
ment.
If the technician and electronics are both on the vehicle, no special pre-
cautions are necessary.
Drilling, welding and milling work
NOTICE
If ACR-Welding work on chassis or superstructure is done:
Disconnect all plugs (connectors) from the electronics.
Ground point as close as possible to the welding point.
► Ensure that the electronics and the plug connector are corresponding-
ly protected against milling and drilling chips etc.
If welding on the vehicle:
► Disconnect the batteries
► Connect disconnected plus and minus cable to produce a conductive
electrical connection.
► Connect protective equipment.
► Always weld with direct current, in the process watch out for the polar-
ity of the electrodes.
► Earthing point as close as possible to welding point.
► Do not lay the cable of the welding device parallel to electrical lines on
the vehicle.
► Avoid voltage peaks.
► Ensure that the parts to be welded are well fixed to one another,
e.g. use earthing clip for fixing.
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