2399156 - E1010 SUPPLY - Description

Description

The electrical system has been designed with the safety of the vehicle uppermost, to prevent the risk of fire and the other consequences of electrical malfunctions and to reduce defective connections thanks to the adoption of the latest generation connectors.The distribution of power takes place via the junction units and/or fuse boxes, connected to the control elements (relays and static actuators) in order to ensure the maximum level of electrical protection and the minimum degree of wiring complexity.The distribution of the functions inside the connectors and the replacement of the connections with short circuit type couplings favours modular arrangements (sub-assembly composition) for all cable looms.

The main safety solutions adopted are:

• supplies protected by maxi fuses to cut out the electrical system, in the case of a short circuit (see detail below);
• the only cables without maxi fuses (starter motor and alternator) are protected and positioned in a safe place;
• the layout of the entire system is designed to optimize the risk of damage in the case of a failure or accident;
• the routing of the actual cables has been optimized, reducing incorrect positioning and noise due to vibrations;
• all the cables are highly resistant to abrasions
• there are special cables in the engine compartment which are resistant to high temperatures and protected with outer casings or pipes;
• the cables in the passenger compartment are protected by corrugated pipes and plush type bands to reduce noise
• the main connections are fitted with anti-slip devices on the terminals (secondary lock) and safety closures (lever lock or CPA) to prevent any distortion of the terminals.

All the electrical systems are supplied by the battery at a voltage of 12. V. The battery is, in turn, recharged by the alternator  See E5010  STARTING AND RECHARING during engine operation. The main supply lines are protected by 'maxifuses' housed in the engine compartment junction unit; other shunt fuses are housed outside it.Some circuits are supplied continuously, even if the vehicle is stopped and the ignition is off, as they are connected directly to the battery.

Other circuits are supplied by turning the ignition key to various different positions:

• when the key is inserted and turned to the first click, the ignition is turned on (MAR position) and several circuits are supplied, which are thus called 'ignition-operated' (lines 'INT' and '15/54');
• the second click - AVV position - instead supplies the starter motor (line '50')., disconnecting some circuits (those which absorb most power), thus ensuring the maximum flow of current to the starter motor; ('INT/A' line).

The lines through which the supply is distributed to the various electrical devices are shown on the wiring diagrams relating to the various functions and systems.

This general diagram shows all the lines which depart from the battery and the MAXIFUSE boxes; reference should be made to the specific diagrams for greater detail.