DescriptionThe vehicle climate control system involves a duct/distributor unit with a heater.The climate control is operated by acting on the three knobs in the dashboard:the left knob controls mixing of hot and cold air;the right knob, mechanically operated via a cable, controls the opening of the flaps which regulate the distribution of air flows;the centre knob electrically controls the ventilation of the air at four different speeds;the right button switches on the heated rear windscreen; the LED comes on when the button is pressed.3023293SeeE3030HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING.When pressed, the central button activates the air recirculation function; when the button is pressed the LED comes on. If the button is not pressed, dynamic air is taken in from ouside due to the car's motion.A dedicated control unit manages system operation by controlling:Air distribution to the vents.speed of the fan (varies continuously);activation of air recirculation;The control unit sets the above parameters in order to adjust passenger compartment temperature to the required level. According to the setting, the control unit adjusts passenger compartment air intake speed by means of the fan motor and air temperature by a mixer actuator. It also controls flow distribution via another actuator and - lastly - the interior/exterior air recirculation function via a final actuator. For more details 3022513Characteristic of working principle5020HEATER . The body computer continually downloads a battery voltage signal for comparison with its limit value. If the recorded battery voltage is lower than the threshold, the computer cuts in via the CAN network to send a signal to disable a series of appliances: this includes the fan control.The climate control system ECU is supplied by an ignition-operated line protected by a fuse in the underfacia control unit; the fan is supplied by a line protected by a specific engine bay control unit fuse.
Functional description Climate control control unit M70 is supplied when the ignition is turned on (INT/A) at pin 3 of a line protected by fuse F31 from underfacia junction unit B2 .; it is supplied directly at pin 2 from a line protected by fuse F39 of underfacia control unit B2 . Pin 1 of M70 is earthed. Recirculation actuator N82 is controlled by control unit M70 , via pins 14, 15, 16 and 17. The air mixing actuator N81 is controlled from control unit M70 from pins 23, 24, 25 and 26.; The air distribution actuator N80 is controlled from control unit M70 via pins 19, 20, 21 and 22. An electronic governer M72 controls fan N85 at different speeds via an earth command: this is ignition-operated (INT/A) from a line protected by fuse F31 of underfacia control unit B2. It receives a control signal from pin 10 of the control unit and returns a feedback signal to pin 18 of M70.ctronic governer Fan N85 is supplied directly from a line protected by fuse F5 of engine bay control unit B1 . Pins 12 and 13 of control unit M70 connect to Body Computer M1 and node H44 [EL 1050] via the CAN line and exchange the following signals:battery voltage signal;rear window activation signal.
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213025802-7040A37fuse box cover - r r1. Disconnect the electrical connections at the front (1a, 1b, 1c,1d, 1e, 1f).2. Undo the bolts fixing the control unit.3. Undo the bolts shown fixing the dashboard cover.2004865
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Unscrew the motor retaining bolt.2. Disconnect the motor electrical connection.3. Remove the motor (3a) releasing the toothed wheel (3b) from thecam rack.2004835
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Unscrew the motor retaining bolt.2. Disconnect the electrical connections for the motor (2a, 2b,2c, 2d).3. Remove the motor (3a) releasing its connection (3b).2004840
1. Release the retainers for the wiring.2. Undo the upper bolts for the crossmember.3. Undo the lower bolts for the crossmember.4. Move the air conditioning crossmember slightly.5. Undo the bolt and move the earth carrier electrical connection.6. Disconnect the electrical connections.7. Disconnect any other electrical connections and remove the crossmember/airconditioning assembly with the dashboard wiring. 2004756
5040C15
769
5040C24
<anchor>0</anchor><span>Dismantling</span><icon><imageid>20</imageid></icon>1Reassembling213025454-5040D90air conditioner systemwiring bundle - r r1. Undo the bolts fixing the shield for the expansion valve.2. Remove the shield.2004779
5040C30
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working under the right side of the dashboard, undo the nutsfixing the bulkhead.2. Remove the bulkhead.2004805
5040C34
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect the electrical connections.2. Undo the bolt fixing the fan.3. Rotate the fan and extract it.2004807
5040C44
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working under the right side of the dashboard, undo the nutsfixing the bulkhead.2. Remove the bulkhead.2004808
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the bolts fixing the shield for the expansion valve.2. Remove the shield.2004815
5040C80
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect the electrical connection for the air recirculationand intake motor.2. Unscrew the bolt.3. Rotate the air recirculation and intake assembly and remove it.2004824
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