Fiat DOBLO 1.9 JTD 8V Da 10/2000 – POWER SUPPLY – – MY 2005 – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

POWER SUPPLY SYSTEM - WIRING DIAGRAM Fiat DOBLO 1.9 JTD 8V Da 10/2000

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Components - POWER SUPPLY - Fiat DOBLO 1.9 JTD 8V Da 10/2000

Component code	Description	Reference to the assembly
A001	BATTERY
A20	STARTER MOTOR
B001	JUNCTION UNIT
B2	JUNCTION UNIT UNDER DASHBOARD
C2	BATTERY EARTH ON ENGINE
C3	BATTERY EARTH ON BODYSHELL
D29	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING
H001	IGNITION SWITCH
M001	BODY COMPUTER

POWER SUPPLY SYSTEM - COMPONENT LOCATION Fiat DOBLO 1.9 JTD 8V Da 10/2000

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Component code	Description	Reference to the assembly
A001	BATTERY
A20	STARTER MOTOR
B001	JUNCTION UNIT
B2	JUNCTION UNIT UNDER DASHBOARD
C2	BATTERY EARTH ON ENGINE
C3	BATTERY EARTH ON BODYSHELL
D29	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING
H001	IGNITION SWITCH
M001	BODY COMPUTER

The entire electrical system has been designed and implemented with a view to the most up-to-date safety and protection standards and is particularly well-protected against fire.Two main types of protection are provided:- active protection, to reduce possible fault causes at source;- passive protection, to minimise the effects of a fault.The first category covers careful design of wiring circuits, including well thought-out positioning and fastening and the definition of properly shielded and protected layouts.For this reason, the alternator and motor wires have been modified and protective caps adopted.Passive protections include all actions (always adopted on vehicles in any case) to reuduce high fault currents (overload and short-circuit).The ratings of all fuses in the system have been selected according to the nominal power uptake of any loads that may be activated simultaneously and to ensure cut-in in the case of a general short-circuit.All systems and electrical equipment are supplied by the battery at a voltage of 12V.The battery is, in turn, recharged by the alternator during engine operationThe main supply lines are protected by fuses grouped in a junction box located near the battery and supplied directly by it.Some circuits are continuously supplied, even with the car at a standstill and the key out because they are connected directly to the battery.Other circuits are supplied by turning the ignition key to various positions:- insert the key and turn it through one click to ON. This supplies numerous circuits that are described as ignition-operated (INT and 15/54 lines);- the second position - AVV (starting) - supplies the starter motor; (line "50"), disconnecting some other circuits (those which absorb a lot of power) thereby ensuring the maximum current flow to the actual starter motor; ("INT/A" line);- When the key is removed by turning backward (and pressing a button), PARK position is selected to ensure the side lights are activated even with the key out ( STAZ and POS lines);767The lines that distribute power to the various appliances are represented by wiring diagrams for the various functions and systems.This general diagram shows all the lines as they leave the battery and junction unit and ignition switch. Refer to specific diagrams for more detail.

All electrical systems and circuits are supplied by battery A01.The power supply for the various devices is managed by the two junction units in the engine compartment B01 and under the dashboard B02 that contain the fuses and the relays that allow the corrcet operation of the electrical equipment.Other circuits are supplied by turning the ignition key H01 to various positions:- in the ON position, numerous circuits and services receive an ignition-operated power supply protected (INT line) by the fuses in the junction unit B01 (line 15/54);- the starter motor (line 50) is operated in AVV position;- the side lights (STAZ and POS lines) are supplied in PARK position.