Electronic Control Units - Fiat 600 Owner's Manual

ELECTRONIC
CONTROL UNITS
When the car is being used normally,
special measures are not necessary.
The following instructions must be
followed very carefully, however, if
you work on the electrical system or
in cases where emergency starting is
necessary:
– Never disconnect the battery from
the electrical system while the engine
is running.
– Disconnect the battery from the
electrical system if you are recharg-
ing it.
– Never perform emergency starts
with a battery charger. Always use an
auxiliary battery.
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CAR MAINTENANCE
– Be particularly careful when con-
necting the battery to the electrical
system. Ensure the battery posts are
connected up to the right leads (the
polarity is correct) and check that the
connection has been made properly.
– Do not connect or disconnect the
terminals of the electronic units while
the ignition key is at MAR.
– Do not check polarity through
sparking.
– Disconnect the electronic units if
you are electrically welding the car
body. Remove the units if tempera-
tures exceed 80°C (special operations
on the bodywork etc.).
IMPORTANT If the sound system
or car alarm systems are not installed
correctly, they can interfere with the
working of the electronic control
units.
Modifications or repairs
to the electrical system
carried out incorrectly
and without bearing the features
of the system in mind can cause
malfunctions with the risk of fire.