2429862 - Introduction - SUN ROOF AND HOOD
All vehicles can be fitted as an option with a large Skydome sun-roof with two glass panels, one fixed and the other mobile. . which is electrically operated. The sun roof is adjustable, by means of a selector, allowing the optimum outside air flow in the passenger compartment. To ensure safety during movement, the sun-roof is fitted with an anticrush safety software function that cuts out movement in the presence of obstacles. The sun roof assembly has an entire structure: the glazed surface extends along Y from the right rain gutter to the left one and along X to an extent that it replaces around 70% of the surface area of the roof panel. The glazed surface is divided into two panels: the rear fixed panel, in thermal tinted glass and the external sliding front panel in thermal tinted glass, operated by a switch. A sealing strip around the edges of the sun-roof is in contact with the sliding panel profile.The roof is fitted with two manually-operated sliding sun blinds that screen out the light. The selector is located on the front courtesy light and controls the electric operating motor by means of a control unit. The sun-roof is moved by the motor pinion that pulls two flexible racks to which are anchored the guides that pull the expanding pulleys that support the sun-roof sliding panel. To limit possible damage to passengers or objects caused by the roof when in movement, an anticrush function is active during roof closure, when the panel is sliding and also during tilt manoeuvres. The figure shows the sun-roof components
The system consists of:
- an electric displacement motor with Hall-effect position and speed sensors;
- a frame with two compartments, the rear for the fixed panel, the front for the sliding panel. The slide mechanism is a flexible rack system;
- an electronic control unit built into the electric motor assembly;
- a selector (one touch) used to move the sun-roof to different positions.
Sun blind
The front and rear polyester blinds to keep out sunlight are sliding, roller type. They can only be operated manually and slide in guides supported by Teflon slide pads interspersed with rubber bearings between pad and guide. These are equipped with a handle at the front that can be grasped with a catch to hold the blind open. The sun-roof may be moved manually by means of the selector under the following conditions:Roof opening.
Roof opening with key-on.With key-on, the front glass panel is opened in AUTOMATIC mode if the button on the left side is pressed for longer than 300 msec. The mechanism moves the glass from fully close to fully open in spoiler position.When you press the same side of the button again for longer than 300 ms, the front glass panel moves to the fully open position. After the initial opening command, the front glass panel may be stopped in intermediate positions by pressing the button again. The front glass panel may be opened in MANUAL mode by pressing on the left side of the button for a time of between 60 and 300 msecs.From completely closed the front glass panel moves proportionally to the time the button is pressed between 60 and 300 msecs: it stops in this position when the button is released. By pressing the same side of the button, again and always for between 60 and 300 msecs., the front glass panel moves, step by step, until the fully open position is reached.This function allows the front panel to be moved to positions intermediate between the positions achievable automatically.Roof closure.
Roof closure with key-on.The AUTOMATIC closure of the front glass panel takes place by pressing the right side of the button for longer than 300 msecs.The front glass roof panel moves from fully open to swivel open position. When the button is pressed on the same side for longer than 300 msecs., the front glass panel moves to closed position. The MANUAL closure of the front glass panel takes place by pressing the right side of the button for longer than 300 msecs.The front glass panel moves from fully open in proportion to the time the button is pressed from 60 to 300 msecs. and stops in the position where the button is released. When the same side of the button is pressed again, within a time period between 60 and 300 msecs. the front glass panel moves step by step to closed position. This function can be used to position the front panel in intermediate positions between the automatic closure positions.ANTIPINCH FUNCTION
To limit possible damage to passengers or objects caused by the roof when in movement, an anticrush function is active during roof closure, when the panel is sliding (X) and also during tilt (Z) manoeuvres. If effort in excess of a given threshold is detected, the control unit interprets this as an obstacle and stops movement immediately before moving the roof back by about 100 mm if it is sliding - or in the fully open position if it is tilting.The anticrush protection can be cut out by setting the selector to the inhibition position as follows:
- select the required position;
- press the selector down vertically and hold down during movement until the selected position is achieved.
SELECTOR
View of ONE-TOUCH control selector
CTA CONTROL UNIT
Sun-roof movement is controlled by an electronic control unit housed in the casing integral with the motor. The unit processes signals from the switch or remote control via the body computer and also controls the anticrush protection function. The function is controlled by the control unit, which receives position and speed information from Hall effect sensors fitted to the crankshaft. When effort in excess of a certain threshold is detected, corresponding to a higher current uptake and a reduction in engine rpm after a time, this is interpreted as an obstacle. The CTA then stops the roof immediately and moves it back in the opposite direction by about 100 mm. The control unit also receives a vehicle speed signal because the vacuum created at certain speeds could change the effort required to close the roof and under certain conditions this could be interpreted as an impediment.The control unit therefore uses this signal to ensure movement is not halted inadvertently.
- +30 direct from battery:
- +15 Key-on:
- Signals (down) from switch
- Signals (up) from switch
- Dedicated odometer signal
- Earth
EMERGENCY MANOEUVRE
The sunroof motor is housed in the middle of the roof.View of activation points for emergency movement.
EMERGENCY MANOEUVRE
If the electric movement device fails to operate, the sun-roof may be moved manually as described below:
- prise up the engine trim cover;
- fit the tool provided in the seat on the motor;
- turn the key in the direction you wish to move the sliding roof
PROCEDURE FOR ALIGNMENT ON THE CAR
If repairs require both sun-roof and motor to be removed at the same time and then refitted, if you are not sure that the sliding guide position has been maintained, restore alignment between the two guides before the parts are refitted because sun-roof alignment is no longer guaranteed and water and air may enter.To restore guide alignment, proceed as follows with the motor disconnected:
- move the support guides by hand to the fully closed (A) or open (B) position on both sides, checking that the sliding is complete;
- Working in Condition A, press the button and check the extent of the geared motor travel, long travel; pressing the button on the same side a second time, short travel; the geared motor should be in the closed position;
- Working in Condition B, press the button and check the extent of the geared motor travel, short travel; press the same side of the button a second time, long travel;
