AIR CONDITIONING - Functional description

1.1, 1.2 8v · Automatic Air Conditioning

Functional description

The climate control unit M070 receives an ignition-dependent supply at pin 2 of connector B along the line protected by the fuse F49, located in the junction unit under the dashboard B002, and a direct battery supply at pin 1 of connector B along the line protected by fuse F39 located in the body computer node M001.

The body computer node M001, from pin 9 connector C, manages the operation of relay T08, which supplies the direct battery supply to the electric motor of the fan N085.

The relay, excluded during engine starting, is always energised, as it is connected directly to earth C011 from pin 49 connector D of the engine compartment junction unit B001.

The vehicle interior air fan N085, is connected to earth C016 at pin 3. The climate control unit M070 manages the various speeds of the fan N085 from pins 7, 8 connector B.

The control unit also provides the supply and earth to all the actuators and sensors connected to it.

From connector A, the climate control unit M070:

• from pins 5, 6 provides the supply and earth reference to the actuator for the external air / recirculation flap N082;
• from pins 9, 10, provides the supply and earth reference to the actuator for the air mixer flap N081;
• from pins 11, 12 provides the supply and earth reference to the actuator for the air distribution flap N080;
• at pin 2 provides the enablement to switch on the air mixer flap actuator N081 and the air distribution flap actuator N080;
• at pins 1, 7 receives signals from the air mixer flap actuator N081 and the air distribution flap actuator N080.
• from pin 8 sends the compressor engagement signal to the engine control unit M010 ( See E6021 COMPRESSOR ENGAGEMENT ).

From connector B, the climate control unit M070:

• from pin 5 supplies the anti-frost sensor K086, the bottom mixed air temperature sensor K087 and the top mixed air temperature sensor K088;
• at pin 6 receives the signal supplied by the anti-frost sensor K086;
• at pin 11 receives the signal supplied by the bottom mixed air temperature sensor K087;
• at pin 12 receives the signal supplied by the top mixed air temperature sensor K088.

From pins 9 and 10 of connector B, the climate control unit communicates via the CAN network with the body computer M001, supplying all the information concerning the status of the air conditioning system See E1050 CAN CONNECTION LINES. Via the CAN line, the climate control unit M070 obtains the external air temperature signal, supplied by the sensor mounted on the door mirror P060 (for further details see See E3032 DOOR MIRROR ADJUSTMENT ).

1.1, 1.2 8v · Manual Air Conditioning

Functional description

The body computer node M001, from pin 9 connector C, manages the operation of the relay T08, which provides the direct battery supply to the electric motor of the fan N085.

The relay, excluded during engine starting, is always energised, as it is connected directly to earth C011 from pin 49 connector D of the engine compartment junction unit B001.

From connector B, the selector H080 sets the selected speed for the fan N085. The selector supplies the reference earth C016 to the motor N085 through the resistive divider O030. Only at maximum speed, the fan motor N085 is connected directly to earth C016.

From connector A pin 2, the selector H080 sends the request to switch on the compressor to the electronic thermostat N086.

The system can be activated by setting at least the first speed on the fan N085. An LED contained in the selector comes on, indicating that the air conditioning is on.

From pin 2, the electronic thermostat N086 sends the engine control unit the request to switch on the compressor See E6021 COMPRESSOR ENGAGEMENT.

From pin 9 connector L, the body computer node supplies the internal lights G045 (connectors A and B), with the side lights on (for further details See E2010 SIDE LIGHTS / NO. PLATE LIGHTS ).

The junction D001 is housed, in the interior compartment, at the bottom of the front right pillar, near the door cable pass, passenger side.

1.3 JTD 16v · Automatic Air Conditioning

Functional description

The climate control unit M070 receives an ignition-dependent supply at pin 2 of connector B along the line protected by the fuse F49, located in the junction unit under the dashboard B002, and a direct battery supply at pin 1 of connector B along the line protected by fuse F39 located in the body computer node M001.

The body computer node M001, from pin 9 connector C, manages the operation of relay T08, which supplies the direct battery supply to the electric motor of the fan N085.

The relay, excluded during engine starting, is always energised, as it is connected directly to earth C011 from pin 49 connector D of the engine compartment junction unit B001.

The vehicle interior air fan N085, is connected to earth C016 at pin 3. The climate control unit M070 manages the various speeds of the fan N085 from pins 7, 8 connector B.

The control unit also provides the supply and earth to all the actuators and sensors connected to it.

From connector A, the climate control unit M070:

• from pins 5, 6 provides the supply and earth reference to the actuator for the external air / recirculation flap N082;
• from pins 9, 10, provides the supply and earth reference to the actuator for the air mixer flap N081;
• from pins 11, 12 provides the supply and earth reference to the actuator for the air distribution flap N080;
• at pin 2 provides the enablement to switch on the air mixer flap actuator N081 and the air distribution flap actuator N080;
• at pins 1, 7 receives signals from the air mixer flap actuator N081 and the air distribution flap actuator N080;
• from pin 8 sends the compressor engagement signal (see wiring diagram E6021) to the engine control unit M010.

From connector B, the climate control unit M070:

• from pin 5 supplies the anti-frost sensor K086, the bottom mixed air temperature sensor K087 and the top mixed air temperature sensor K088;
• at pin 6 receives the signal supplied by the anti-frost sensor K086;
• at pin 11 receives the signal supplied by the bottom mixed air temperature sensor K087;
• at pin 12 receives the signal supplied by the top mixed air temperature sensor K088.

From pins 9 and 10 of connector B, the climate control unit communicates via the CAN network with the body computer M001, supplying all the information concerning the status of the air conditioning system See E1050 CAN CONNECTION LINES. Via the CAN line, the climate control unit M070 obtains the external air temperature signal, supplied by the sensor mounted on the door mirror P060 (for further details see See E3032 DOOR MIRROR ADJUSTMENT ).

1.3 JTD 16v · Manual Air Conditioning

Functional description

The body computer node M001, from pin 9 connector C, manages the operation of relay T08, which supplies the direct battery supply to the electric motor of the fan N085.

The relay, excluded during engine starting, is always energised, as it is connected directly to earth C011 from pin 49 connector D of the engine compartment junction unit B001.

From connector B, the selector H080 sets the selected speed for the fan N085. The selector supplies the reference earth C016 to the motor N085 through the resistive divider O030. Only at maximum speed, the fan motor N085 is connected directly to earth C016.

From connector A pin 2, the selector H080 sends the request to switch on the compressor to the electronic thermostat N086. The system can be activated by setting at least the first speed on the fan N085. An LED contained in the selector comes on, indicating that the air conditioning is on.

From pin 2, the electronic thermostat N086 sends the engine control unit the request to switch on the compressor See E6021 COMPRESSOR ENGAGEMENT.

From pin 9 connector L, the body computer node supplies the internal lights G045 (connectors A and B), with the side lights on (for further details See E2010 SIDE LIGHTS / NO. PLATE LIGHTS ).

The D001 junction is housed, in the interior compartment, at the bottom of the front right pillar, near the door cable pass, passenger side.