Wiring diagram - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
COMPONENTS - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
| Component code | Name | Assembly reference |
| B1 | Engine compartment junction unit | - |
| B1 | Engine compartment junction unit | |
| C10 | Front left earth | - |
| D4 | Front/engine coupling | - |
| D4 | Front/engine coupling | |
| K10 | 4 stage pressure switch | - |
| K10 | 4 stage pressure switch | |
| L20 | Air conditioning compressor "on" electromagnet | - |
| L20 | Air conditioning compressor electro-magnet | |
| M10 | Engine management ECU |
Location of components - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
COMPONENTS - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
| Component code | Name | Assembly reference |
| B1 | Engine compartment junction unit | - |
| B1 | Engine compartment junction unit | |
| C10 | Front left earth | - |
| D4 | Front/engine coupling | - |
| D4 | Front/engine coupling | |
| K10 | 4 stage pressure switch | - |
| K10 | 4 stage pressure switch | |
| L20 | Air conditioning compressor "on" electromagnet | - |
| L20 | Air conditioning compressor electro-magnet | |
| M10 | Engine management ECU |
Description - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
The right button in the climate control control panel in the centre of the dashboard switches on the air cooling and dehumidifying circuit, activating the air conditioning compressor.
Functional description - COMPRESSOR ENGAGEMENT - Fiat DOBLO 1.9 JTD 8V da 12/03
The compressor engagement circuit is controlled by the relay R5 housed in the engine compartment junction unit B01 . It is supplied by the direct line from the battery entering at pin 1 connector A of the junction unit and protected by fuse F19 .The coil for the relay R5 is supplied by the signal coming from the relay R9 which, in turn, receives a direct supply from battery from pin 1 connector A. The supply to the coil for the relay R9 is also direct from the battery from pin 1 connector A and is protected by fuse F18 .The relays R9 and R5 are energized by an earth signal coming from the engine management control unit M10 (pin 13 for R9 and pin 18 for R5 ). In this way the control unit M10 controls the engagement of the air conditioning compressor L20 at a voltage of 12 V through the relay R5 .
