DescriptionAn automatic system manages the passenger compartment climate control, i.e. temperature and ventilation with recirculation and air flow orientation, with separate management of the temperature for the left and right hand sides of the passenger compartment.A dedicated control unit manages system operation by controlling:air temperature at the driver/passenger vent;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. The system controls are located outside the control unit housing.The following parameters/functions can be modified manually:fan speed;distribution directioncompressor disablementdefrosting/demisting:recirculation.Manual selections always take precedence over automatic selections and are stored until the user deliberately cancels the command, allowing the automatic device to take control over the relevant function.The control unit downloads information on interior and exterior temperature and climatic conditions via special sensors.exterior temperature sensor, locate on the driver's side door mirror. The sensor reading is downloaded by a control unit on the door and filtered as necessary; it is then sent via the CAN network to the climate control system ECU (to instrument panel and other appliances).lower mixed air temperature sensor (right and left);upper mixed air sensors (right and left);sunlight sensor, which measures the sun's rays on the windscreen;After processing the information, it adjusts passenger compartment air intake speed by means of the fan motor and air temperature by means of two mixer actuators (one for the right side and one for the left). It also controls flow distribution via another actuator and - lastly - the interior/exterior air recirculation function via a final actuator. When required, the control unit also controls the engagement of the air cooling and dehumidifying circuit, activating the air conditioning compressor. 2399370SeeE6021COMPRESSOR ENGAGEMENT For more details, 2398701Characteristic of working principle5040AIR CONDITIONING CASING AND COMPONENTS . 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.When the outside temperature measured is less than or equal to 3 °C, the instrument panel display shows the 'Ice Danger' message with the (snow) symbol; this situation is also signalled through the buzzer.The climate control system control unit is supplied by two lines, one direct and one controlled by the ignition, protected by fuses in the underdashboard control unit. the fan is supplied by a line protected by a special fuse and by a specific relay in the engine compartment control unit.
Functional description Climate control control unit M70 is supplied when the ignition is turned on (INT) at pin 39 by the line protected by fuse F49 of underfacia junction unit B2. ; it is supplied directly at pin 30 from a line protected by fuse F39 of underfacia control unit B2. Pin 40 of M70 is earthed. The control unit M70 is connected, via the CAN line, from pins 1 and 2 to the Body Computer M1 and to other nodes. Sensors K111 (right lower treated air) and K113 (left lower treated air), K110 (right upper treated air) and K112 (left upper treated air) are connected to control unit M70: these sensors receive a reference earth from pin 11 and send signals to pins 20, 17, 9 and 18 of M70. The frost sensor K86 receives a reference earth from pin 11 and sends a signal to pin 8 of M70. The solar ray sensor K90 informs the control unit of the heat coming from rays: it receives a 5V supply from pin 7 control unit M70 and gives out two signals: to pin 19 for the right area and to pin 10 for the left area. The air conditioning system is equipped with one recirculation actuator ( N82 ), two air blending actuators (N78 and N79) and two air districution actuators ( N80 and N83 ). The recirculation actuator N82 is operated by the control unit M70 from pins 12 and 22. The blend actuators N78 and N79 are operated by the control unit M70 by pins 32-37 and 35-24, respectively, receiving the supply for controlling the potentiometer from pin 31 of M70, a reference earth from pin 11 of M70 and sending a feedback signal to pins 25 and 26 of M70. The distribution actuators N83 and N80 are operated by the control unit M70 by pins 33-34 and 36-38, respectively, receive a supply for controlling the potentiometer from pin 31of M70, a reference earth from pin 11 of M70 and send a feedback signal to pins 27 and 28 of M70. Fan N85 (with built-in electronic speed regulation circuit) is ignition-operated (INT/A) by a line protected by fuse F31 of underfacia control unit B2 and controlled by relay T8 and dedicated fuse F8 of engine compartment junction unit B1. It receives an input control signal for the various speeds from the controlunit from pin 5 of M70 and returns a feedback signal to pin 29 of M70. The outdoor temperature sensor is located on door mirror P60: the sensor is connected to the control unit on door M66 and thence, via the CAN network, to M70. Pin 21 of M70 controls activation of the compressor SeeE6021 COMPRESSOR ENGAGEMENT . The heated rear windscreen controls are connected to pins 4 and 13 of M70 SeeE3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING . The controls for the hazard warning lights are connected to pins 15 and 14 of M70 SeeE2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS .
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid and disconnectthe battery.1. Undo the nut.2. Move aside the retainer.3. Remove the battery carefully.2050795
5530B22
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400577-5530B10battery - r+r2400580-5530B52Battery DRIP TRAY/SUPPORT - R.R.Open the bonnet lid.1. Disconnect the electrical connection (1a) from the negative batteryterminal (1b).2. Disconnect the electrical connection from the bodyshell3. Disconnect the electrical connection from the gearbox casing.4. Keep the battery earth lead.2050796
5530B36
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the vehicle on a lift.Raise the car.1. Undo the nut (1a) and disconnect the electrical connections (1b,1c) from the starter motor.2050797
5530B52
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400577-5530B10battery - r+r1. Open the retaining bands and release the wiring.2. Remove the battery support tray (2a), releasing the dischargepipe (2b) from the passage hole (2c). 3. Undo the bolts.4. Remove the battery cage.2050799
5530B60
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid.1. Undo the nut.2. Undo the retaining buttons using the special tool3. Remove the belt.2050800
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b).2050746
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400802-7040A37fuse box cover - r r1. Disconnect the electrical connections (1a, 1b, 1c, 1d, 1e, 1f).2. Undo the bracket retaining bolt.3. Slightly move the bracket (3a) for the dashboard trim and undothe bolt (3b).4. Undo the other bolts securing the body computer/junction unit.5. Slightly move the body computer/junction unit assembly.6. Disconnect the electrical connections (6a, 6b, 6c).7. Recover the body computer/junction unit.2050752
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect electronic control unit electrical connections (1a),(1b), (1c).2. Undo the bolts.3. Recover the control unit.2050753
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect electronic control unit electrical connections (1a),(1b), (1c).2. Undo the bolts.3. Recover the control unit.2050754
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Extract the sensor assembly and fan (1a) from the air conditioningcontrol unit (1d), releasing the retainers (1b) and the connector(1c). 2050622
5010D56
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working at the central top of the dashboard, remove the trim(1a) by releasing the retainers (1b). 2. Disconnect the electrical connection for the solar sensor.3. Recover the solar sensor (3a) by releasing the retainers (3b).2050623
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the electrical connectionfor the recirculation motor. 1. Undo the four bolts (1a) and remove the air intake assembly (1b). 2050708
5040C20
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the six bolts (1a) and separate the air distribution/heaterassembly (1b) from the evaporator unit (1c). 2050710
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working under the right side of the dashboard, disconnect theelectrical connection.2. Undo the bolts fixing the fan.3. Extract the fan.2050713
5040C44
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working under the right side of the dashboard, disconnect theelectrical connection. 2. Undo the bolt (2a) and remove the variator (2b).2050714
5040C54
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the three bolts and remove the water pipe guard.2050715
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400797-7040A19cushion padding - rr1. Unscrew the motor retaining bolt.2. Disconnect the motor electrical connection.3. Remove the motor releasing the intake.2050724
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400797-7040A19cushion padding - rr1. Unscrew the motor retaining bolt.2. Disconnect the motor electrical connection.3. Remove the motor releasing the intake.2050726
5040D94
23
5040D96
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting212400797-7040A19cushion padding - rr1. Unscrew the motor retaining bolt.2. Disconnect the motor electrical connection.3. Remove the motor releasing the intake.2050728
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Open the cover giving access to the glass retainer.2. Provisionally connect the switch unit to its electrical connection(2a) and move the retainer (2b) of the glass (2c) to the accessposition (as illustrated in the figure). 3. Disconnect the retainer (2b) from the glass, then lift the glass(2c) to the end of its travel and secure it in this position witha hook (3a). 2050882
1. If adjustment is carried out after removing the door, tightenthe hinge bolts to the specified torque. 2. If the hinges had been removed from the door previously, fullytighten the hinge bolts. 3. Undo the bolt (3a) on the check strap (3b) and close the door to push the check strap back in. 4. Loosen the bolts securing the hinges to the bodyshell, usingthe specific tool.5. Adjust the door position, making use of the bolt slots, so thatit is perfectly aligned with the body. 23It is advisable to work on onehinge at a time. Possible adjustment movements are indicated byarrows.2050886
7005A24
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the bolts fixing the hinge to the bodyshell.2. Remove the hinge (2a) and collect any shims (2b).2050888
7005A25
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Open the door and undo the bolt.2. Recover the bracket.2050890
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Open the door and remove the seal.2050896
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