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Electronic control units – FIAT 600 User Manual

Page 117

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116

CAR MAINTENANCE

IMPORTANT If the sound system

or car alarm systems are not installed
correctly, they can interfere with the
working of the electronic control
units.

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.

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.

– 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.).

105-123 Seicento GB 22-11-2007 10:51 Pagina 116