Electronic Control Units - Maserati GRANCABRIO Owner's Manual

Electronic control units

No special precautions are required
for the normal use of the vehicle.
In the case of repairs to the electrical
system or in an emergency starting,
the following instructions must be
strictly followed:
- Never disconnect the battery from
the electrical system when the
engine is running.
- Disconnect the battery from the
electrical system when recharging
it (see page 205 "If the battery is
dead").
WARNING: If you need to disconnect
the battery, wait at least 30 seconds
from the last seat movement.
If disconnecting the battery before,
you will have to run the initialisation
procedure described on page 105.
WARNING: When the battery is
disconnected, you must fi rst detach
the negative pole terminal (–) and
then the positive pole one (+).
WARNING: The battery is secured to
the vehicle with a metal clamp, so be
extremely careful not to let the clips
on the end of the cables come into
contact with it.
WARNING: When the battery is
reconnected, you must fi rst attach
the positive pole (+), remembering to
cover it with the cap provided, and
then the negative one (–).
- Never perform the emergency
starting procedure using a battery
charger: always use an auxiliary
battery.
- Take special care when connecting
the battery to the electrical system,
checking both that polarity is
correct and that the connection is
properly working.
- Do not connect or disconnect the
terminals of the ECUs when the
ignition key is at MAR.
- Do not check the electric polarities
through sparking.
- Disconnect the ECUs in the event
of electrical welding on the
vehicle body. Remove them if the
temperature is over 80°C (special
operations on the bodywork, etc.).
WARNING: Incorrect installation or
modifi cations to the radio and alarm
systems may interfere with the proper
operation of the ECUs.
WARNING: Changes or repairs to
the electrical system performed
incorrectly or without taking into
account the technical specifi cations
of the system may cause operating
anomalies with the risk of fi re.
WARNING: If you need to wash the
engine compartment, do not direct
the jet of water for too long directly
on the engine compartment ECU.
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