Wiring diagram - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
COMPONENTS - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
| Component code | Name | Assembly reference |
| A1 | Battery | |
| A10 | Alternator | |
| A10 | Alternator | |
| A20 | Starter'' motor | |
| A20 | Starter'' motor | |
| B1 | Engine compartment junction unit | - |
| B1 | Engine compartment junction unit | |
| B1 | Engine compartment junction unit | |
| B2 | Junction unit under dashboard | |
| B37 | Spark plugs (MAXI FUSE) fuse | - |
| B37 | Spark plugs (MAXI FUSE) fuse | |
| C15 | Facia earth, driver''s side | - |
| D4 | Front/engine coupling | - |
| D4 | Front/engine coupling | |
| D7 | Engine/alternator coupling | - |
| E50 | Instrument panel | - |
| E50 | Instrument panel | |
| H1 | Ignition switch | |
| M1 | Body computer |
Location of components - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
COMPONENTS - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
| Component code | Name | Assembly reference |
| A1 | Battery | |
| A10 | Alternator | |
| A10 | Alternator | |
| A20 | Starter'' motor | |
| A20 | Starter'' motor | |
| B1 | Engine compartment junction unit | - |
| B1 | Engine compartment junction unit | |
| B1 | Engine compartment junction unit | |
| B2 | Junction unit under dashboard | |
| B37 | Spark plugs (MAXI FUSE) fuse | - |
| B37 | Spark plugs (MAXI FUSE) fuse | |
| C15 | Facia earth, driver''s side | - |
| D4 | Front/engine coupling | - |
| D4 | Front/engine coupling | |
| D7 | Engine/alternator coupling | - |
| E50 | Instrument panel | - |
| E50 | Instrument panel | |
| H1 | Ignition switch | |
| M1 | Body computer |
Description - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
The ignition and recharging circuit comprises a battery, starter motor and alternator.The battery (12V) is the low maintenance type.The starter motor consists of a direct current motor supplied by the battery and an excitation solenoid.When the ignition key is turned to the extreme position (AVV), the starter motor windings are supplied, producing electro-magnetic forces which rotate the motor pinion. At the same time, the solenoid is energized and operates the mechanism for engaging the pinion in the flywheel ring gear, thus turning over the engine.The alternator recharges the battery during normal engine rotation.The alternator shaft (rotor) is turned by the crankshaft by means of a belt. When supplied with an excitation current, the rotor generates a magnetic field that induces an alternating current in the fixed winding (stator).A diode rectifying bridge located on the back of the alternator transforms the alternating current into a direct current, which is sent to recharge the battery.A voltage regulator, also built into the alternator, maintains a constant voltage supply (about 14V) throughout the load and engine speed ranges.
Functional description - STARTING AND RECHARING - Fiat DOBLO 1.9 JTD 8V da 12/03
A line (50) leaves the ignition switch H01 from pin 3 connector A coming directly from the battery. With the ignition key in the (AVV) position, the starter motor A20 solenoid winding is supplied at pin C.Pin A of the starter motor receives the voltage coming directly from the battery A01 .The direct current produced by the alternator A10 (pin B+) is sent to recharge the battery A01 , passing through the motor A20 pin B. When the alternator does not turn and therefore does not recharge the battery, it sends an earth signal from pin D+ to the body computer M01 pin 19 of connector C. This controls the lighting up of the ''battery recharging'' warning light in the instrument panel E50 from pins 5 and 6 of connector D (CAN line).When the engine has been started up, this signal becomes 12 V and the warning light therefore goes out.The body computer and the instrument panel communicate with one another via pins 5 and 6 connector D of the computer and pins 3 and 4 connector A of the panel.The body computer can also be supplied via pin 11 connector E (supply controlled by the ignition) and pin A connector C (direct supply) of the junction unit B02 . There is a protective fuse F1 for the direct supply located in the junction unit B01 .These lines also supply the instrument panel E50 via two lines protected by fuses F37 and F53 of junction unit B02 and enter the panel at pins 1 and 2 connector A.Pins 8 and 9 connector D of the body computer are connected to earth.
