841005804 - SUN ROOF

An electrically operated sun roof, which can also be operated from a distance using a remote control, is available on request for all vehicles. The sun roof can be adjusted, using a selector, in nine positions in addition to closed, allowing and excellent intake of outside air into the passenger compartment. To guarantee safety during the various movements, the sun roof is equipped with a special safety device which stops movement if there is an obstacle present.

SPECIFICATIONS

The sun roof has a sliding glass element, electrically operated by means of an electric motor and can be adjusted by means of a selector into nine positions (three tilted and six retracted sliding positions) in addition to the closed position.There is a seal along the edges of the sun roof which is in contact with the roof profile.The sun roof is also fitted with a rigid trim which slides together with the glass panel.The selector is located on the roof near the courtesy light which, by means of a control unit, controls the action of the electric motor. Movement takes place by means of two flexible racks to which the slides which drive the pullies supporting the sun roof are secured.In order to limit possible damage, to passengers or objects, caused by the movement of the roof, there is a safety function that is activated the whole time that the roof is closing, both during the sliding of the panel and the tilting movement.There are also drainage channels, at the front and rear of the frame, that drain the water, through suitable pipes fitted with anti-reflux valves, that could penetrate through the seals when it is raining or when the vehicle is washed.

COMPOSITION

The system consists of:

  • an electric movement motor fitted with Hall effect speed and position sensors;
  • a sliding frame equipped with a flexible rack drive system;
  • an electronic control unit, integrated in the electric motor group;
  • a selector for the different sun roof positions, fitted with an inhibitor control.
  • solar cells incorporated in the roof panel to supply the air conditioning system fan and thereby reduce the temperature in the passenger compartment (with the vehicle stationary).

OPERATION

The sun roof is moved along sliding guides, on the frame, by means of an electric motor than can be controlled either manually using the selector or remotely by means of a command sent by the Body Computer to the control unit.    (Vedere sottogruppo ) 5505 CIRCUITI ELETTRICI DEGLI STRUMENTI/INDICATORIThe action of the motor moves the flexible driving racks, housed in special housings in the frame, to which the mechanisms for supporting the sun roof are secured, with the sun roof moved to the desired point or position.The sun roof is also fitted with a blind underneath which slides together with the glass panel and acts as a finishing trim.The roof can be moved manually, using the selector, in the following conditions:

  • with the ignition key in the ON position (key-on);
  • with the ignition key in the OFF or PARK position (key-off) with the doors closed or with one of the front doors open if the selector is operated within two minutes then the roof is enabled; after this period has elapsed the sun roof is disabled.
If the sun roof is open its operation is managed by the remote control on the Body Computer (DF5505) and is activated by signals coming from:    (Vedere sottogruppo ) 5505 CIRCUITI ELETTRICI DEGLI STRUMENTI/INDICATORI

  • remote contro;
  • key lock in the door;
The sun roof should complete the movement from open to closed automatically within 15 seconds; irrespective of the position of the selector during this stage it is possible to manually stop the movement of the roof within 10 seconds by a vertical impulse on the selector or by turning its position. The roof ignores the remote command and assumes the new position.
The antipinch function is always active during sliding/tilting movement operations (including operations commanded by a remote unit).
never disconnect the battery or the sun roof supply whilst it is moving or less than 5 seconds after the roof has stopped moving. If this is the case, the control unit loses its memory and it must be restored by following the procedure described in the appropriate paragraph.

Anti-crush safety function

In order to limit possible damage, to passengers and/or objects, caused by the movement of the roof, there is a safety function that is activated the whole time that the roof is closing, both during the sliding of the panel and the tilting movement.Following the detection of a force above a certain level, which is notified by the control unit as a possible obstacle, the latter commands the immediate stopping and the reversal of the movement by about 10cm in the case of sliding or by a position in the case of tilting.When the obstacle has been removed, press the control selector vertically (inhibitor function) to close the roof.
The antipinch function is inhibited during this operation. If the obstacle is present, the sun roof will be mechanically locked. This condition can damage the sun roof.

Selector

The manual control selector can be adjusted:

  • by turning the knob in an anti-clockwise direction, at three pre-defined heights for tilting the spoiler from "B1 to B3";
  • by turning the knob in a clockwise direction, in six pre-defined sliding positions from "S1 to S6";
  • position "0" corresponds to the roof closed. This position can also be recognized by the longer duration of the click;
  • in the "inhibitor" position (all the selector connections are earthed) the selector is pressed in a vertical direction.

Control unit

The movement of the sun roof is managed by an electronic controlunit, housed in the casing on the motor, which processes the signals coming from the selector or the remote command, via the Body Computer, also controlling the safety protection function.This function is managed by the control unit which receives information from both the position and speed Hall effect sensors, on the motor. Following the detection of a force of more than a certain level, corresponding to a greater current absorption and notified as being a possible obstacle, the control unit commands the immediate stopping and reversal of movement by about 10 cm.The control unit also receives a vehicle speed signal because, depending on the speed, through the effect of the vacuum, the force required for closing the roof changes and in certain circumstances this could be perceived as an impediment. The control unit therefore uses this signal in order to mistakenly stop the movement.

Resetting control unit memory

The sun roof may lose the movement memory as a result of a break in the supply whilst the roof is moving. To reset the memory, follow the procedure described below:

  • place the selector in the maximum tilt position (end of rotation in anti-clockwise direction B3);
  • press the selector vertically, keeping it in this position until the roof stops in the maximum tilt position (once the maximum position is reached the racks move back about one centimetre);
  • release the selector and, within five seconds, press the selector again, keeping it pressed;
  • wait until the roof completes a full travel from maximum tilt position to maximum open position - from maximum opening to closed;
  • release the selector and return it to the closed position (0).
At this point the control unit memory is reset.

Emergency manoeuvre

If the electric device for moving the roof fails, the sun roof can be moved manually proceeding as described below:

  • detach the courtesy light;
  • introduce the key into the housing in the motor;
  • turn the key in a clockwise direction to open the roof or in an anti-clockwise direction to close it.

Alignment

Alignment procedure on the vehicle

During repair operations on the vehicle which involve removing the sun roof and the motor at the same time, when refitting, if it is unsure whether the position of the sliding guides has been maintained, before refitting the parts, the two guides must be aligned because the alignment of the sun roof can no longer be guaranteed and this could result in malfunctions and wind noise.
To restore the alignment of the guides with the motor disconnected, follow the procedure described below:

  • manually place the supporting guides in the fully forward position on both sides, checking that the sliding is complete;
  • refit the motor;
  • reconnect the motor to the electrical system and the selector to the control unit;
  • carry out the control unit memory resetting procedure described in the relevant paragraph;
  • refit the sun roof on the supports, suitably adjusting their position to ensure that the alignment is correct and the seal perfect;
  • attach the finishing blind.

Alignment procedure at the bench (with the sun roof assembly at the bench)

Following a procedure which has involved disconnecting the motor or the moving or sliding parts, to align the sun roof guides and position the moving parts correctly, follow the procedure described below:

  • fit the detached parts with the exception of the motor;
  • manually place the supporting guides in the fully forward position on both sides, checking that the sliding is complete;
  • refit the motor;
  • refit the sun roof on the vehicle and carry out the control unit memory resetting procedure, as described in the relevant paragraph.
  • refit the sun roof on the supports, suitably adjusting their position to ensure that the alignment is correct and the seal perfect;
  • attach the finishing blind.

ROOF PANEL (SOLAR CELLS)

There is a battery with 21 mono-crystalline solar cells in the glass panel which is capable of providing a total power of 24 W.The solar cells come into operation when the vehicle is under the following conditions:

  • Vehicle parked with key OFF;
  • Front and rear doors closed.
  • Boot lid closed
  • CAN in Sleep On status or disabled.
  • Sunroof closed or in spoiler position.
The electrical energy produced by these cells (with the vehicle stationary and the ignition key in the OFF position, sun roof closed or in spoiler position) supplies the air conditioning system fan.When the car is in the situation described previously a remote control switch inside the air conditioning fan cuts off the direct power supply from the battery so that electrical power produced by the solar cells can supply the air conditioning fan in first speed position and cut out the vehicle air conditioning system management unit.When the CAN is re-awoken (by opening a door or the boot lid), the remote control switch cuts off the power supply from the solar cells so the air conditioning system can operate normally.The advantages of this solution are:

  • reduction in the high temperature inside the passenger compartment produced by the rays of the sun;
  • support for the air conditioning system, reducing its workload.
This function is only activated with the sun roof closed or in the spoiler position, whilt it is inhibited from the first opening position.
Each time the system is switched off, after having memorized the status of the controls/implementations, it forces the recirculation open, thereby preparing fthe operating conditions for the "solar cell roof" option.