DescriptionThe vehicle climate control system involves a duct/distributor unit with a heater. The air conditioning system includes the heater and has the function of producing cold, dehumidified air by switching on the compressor and the cooling system.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 air recirculation button and the button for switching on the air conditioning compressor are located in the lower part of the control panel.A dedicated control unit manages system operation by controlling:Air distribution to the vents.speed of the fan (varies continuously);activation of the compressor (air refrigeration circuit);activation of air recirculation;The MAX-DEF fast defrost function (i.e. a set of actions which allow both the windscreen and the rearscreen to be demisted quickly);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. When required, the ECU automatically activates the cooling circuit and dehumidifies the air by operating the air conditioner compressor 3023557SeeE6021COMPRESSOR ENGAGEMENT . For more details 3022514Characteristic of working principle5040AIR CONDITIONING CASING AND COMPONENTS . 767 Recirculation brings about closing of windows 3023321SeeE3050ELECTRIC FRONT WINDOWS and sun roof 3023329SeeE3060SUN ROOF . The air conditioning control unit downloads a signal from the gas presence sensor and activates the recirculation function to prevent polluted air from being taken into the passenger compartment. When normal conditions are restored, the climate control system ECU resets recirculation to the position prior to function activation. Because recirculation is activated under these conditions, a command is sent for automatic closure of the windows 3023321SeeE3050ELECTRIC FRONT WINDOWS and sun roof 3023329SeeE3060SUN ROOF . The climate control system ECU receives a signal from the body computer to indicate that the windscreen washer is on and activates the recirculation function to prevent the liquid detergent smell from entering the passenger compartment.The vehicle speed signal - received by the CAN network - is used to filter outdoor temperature and adjust ventilation and the dynamic air intake according to car speed.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. Fan N85 is supplied directly from a line protected by fuse F5 of engine bay control unit B1 . Pin 11 of M70 controls activation of compressor .3023557SeeE6021COMPRESSOR ENGAGEMENTPins 12 and 13 of control unit M70 connect to Body Computer M1 and node H44 via the CAN line and exchange the following signals:speedometer signalwindscreen washer activation signal for recirculation activationwindow and sun-roof closure controlbattery voltage signalrear window activation signal
0Removing201Refitting213025802-7040A37fuse 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
0Removing201Refitting211. Ensure that the ignition key is in the OFF position, then disconnectthe negative battery terminal (-).2. Open the maxi fuse box cover.3. Undo the bolts securing the 'maxi-fuse' box to the battery.4. Loosen the bolt fixing the battery terminal (+).5. Release the maxi fuse box from the battery and move it to theside.2004975
5530B14
Follow these precautions:769768768
5530B18
Follow these precautions.769On batteries with an opticam hydrometer,electrolyte level and battery charge status can be monitored qualitativelyby examining the indicator colour: a light, bright colour indicates low electrolytelevel: top up with distilled water;a dark colour without a green area in thecentre indicates that the electrolyte level is correct but chargeis low: recharge the battery; a dark colour with a green area in themiddle indicates that both electrolyte level and charge status arecorrect: no action is necessary. For further details, see DESCRIPTION ANDOPERATION - 5580.768Proceed as follows.Check the battery voltage without loadusing the test device recommended by the Service outlets (e.g. 'MICRO360'). Depending on the voltage values measured,which define the state of charge of the battery, proceed as follows:If the voltage without load is less than12.10 V, replace the battery (see op.). 5530B10).If the voltage without load is over 12.10V but less than 12.50 V, recharge the battery (see op. 5530B14).If the voltage without load is over 12.50V, the battery is efficient.If necessary, top up the electrolyte asfollows.Carefully remove the cap strip.Top up with distilled and deionized water,taking care not to allow electrolyte to splash out.768
0Removing201Refitting21Place the vehicle on a lift.Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b).2004980
5530B40
0Removing201Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b).2004986
5530B52
0Removing201Refitting21Proceed with removal 3025534-5530B10battery - r+r .1. Remove the relay/fuse box cover.2. Undo the nut (2a) and disconnect the earth lead (2b) from therelay-fuse box.2004990
5530B60
0Removing201Refitting213025534-5530B10battery - r+r1. Remove the battery drip tray.2. Unscrew bolts (2a) and loosen bolt (2b) securing the batterycradle.3. Move the battery cradle aside.4. Release the belt retaining stud.5. Remove the belt.2005002
0Removing201Refitting211. Release and gently extract the switch unit.2. Disconnect the electrical connections.3. Recover the switch unit.2005147
7005M14
0Removing201Refitting211. Unscrew the bolt.2. Gently extract the switch unit and control unit.3. Disconnect the electrical connections (3a, 3b).4. Recover the switch unit and control unit.2005148
0Removing201Refitting213025685-7005R30electrically controlleddoor mirror (one) - r+r (left).1. Undo the lower bolts.2. Move the rear view mirror assembly slightly.3. Remove the outside air temperature sensor from its housing.4. Disconnect the electrical connections for the sensor from theconnector.5. Cut the retaining band and remove the wiring and sensor.2004693
5010D27
0Removing201Refitting213025797-7040A12removable box on facia- arrangeRemove the radio.1. Unscrew the bolts2. Extract the control unit/controls without disconnecting the electricalconnections.2004694
0Removing201Refitting211. Release the sensor from the retainers.2. Disconnect the electrical connections.3. Recover the sensor.2004697
5010D72
0Removing201Refitting21Open the bonnet lid.1. Remove the cover.2. Undo the bolts retaining the windscreen base right trim.3. Release the inner retainers using the special tool.4. Recover the windscreen base right trim.2004698
0Removing201Refitting211. 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
0Removing201Refitting211. 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
0Removing201Refitting211. Undo the bolts fixing the shield for the expansion valve.2. Remove the shield.2004815
5040C80
0Removing201Refitting211. 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
0Removing201Refitting213025672-7005E12corner cover of onefront side door, lh or rh r r1. Disconnect the electrical connections for the door mirror.2. Remove the sound inslation.3. Undo the bolts securing the door mirror.4. Remove the door mirror.2005152
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