Components - COMPRESSOR ENGAGEMENT - Fiat ULYSSE 2.2 16V JTD da 04/03
| Component code | Description | Reference to the assembly |
| A001 | BATTERY | - |
| B001 | ENGINE COMPARTMENT JUNCTION UNIT | |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| E050 | INSTRUMENT PANEL | |
| H001 | Ignition switch | |
| K086 | FROST SENSOR | |
| K120 | LINEAR SENSOR FOR FANS | - |
| L020 | AIR CONDITIONING COMPRESSOR ENGAGEMENT ELECTRO-MAGNET | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT CONTROL UNIT | |
| M070 | CLIMATE CONTROL SYSTEM CONTROL UNIT | - |
| Component code | Description | Reference to the assembly |
| A001 | BATTERY | - |
| B001 | ENGINE COMPARTMENT JUNCTION UNIT | |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| E050 | INSTRUMENT PANEL | |
| H001 | Ignition switch | |
| K086 | FROST SENSOR | |
| K120 | LINEAR SENSOR FOR FANS | - |
| L020 | AIR CONDITIONING COMPRESSOR ENGAGEMENT ELECTRO-MAGNET | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT CONTROL UNIT | |
| M070 | CLIMATE CONTROL SYSTEM CONTROL UNIT | - |
The special button on the climate control system in the centre of the dashboard switches on the air cooling and dehumidification circuit, activating the air conditioning compressor.The above button enables operation of the air cooling circuit, but actual compressor activation is also dependent upon activation of:
The compressor activation control is given by pressing the key housed on the climate control unit M070.Control unit M070 (pin 10 connector A) receives power via a line protected by fuse F14 leaving body computer node M001 (pin 6 connector D) and communicates via the CAN line (pins 14 and 15 connector A) with instrument panel E050 (pins 6 and 12) and with body computer node M001 (pins 8 and 10 connector D).Body computer M001, again via the CAN line, forwards the command to engine control unit M010 (pins A3 and A4 connector A), enables or disables compressor activation (pins F2, H2 and F4 connector A) from linear sensor K120 (pin 1, 2 and 3).Compressor L020 is supplied (pins 1 and 2) from engine compartment junction unit B001 (pins 1 and 5 connector C), which is connected in turn (pins 12 and 11 connector F) via the CAN line to body computer node M001 (pins 25 and 27 connector C).Demister sensor K086 is also connected (pins 1 and 2) to body computer node M001) (pins 17 and 16 connector E respectively): the signal contains information on the evaporator temperature, which is also sent to control unit M070.
