Windows and Glass: Description and Operation
Glass, Frames And Mechanisms
COMPONENT LOCATION - WINDSHIELD AND BACKLIGHT
COMPONENT LOCATION - DOOR GLASS AND REAR QUARTER GLASS MECHANISMS
NOTE: Convertible shown, coupe similar.
INTRODUCTION
The windshield, which is constructed of 5.5 mm laminated glass with a black obscuration band, is bonded and sealed to the body aperture using Polyurethane (PU) adhesive. The mounting boss for the rain sensor is also PU bonded to the inner surface of the screen and is common to the coupe and convertible. The mounting button for the interior mirror is attached to the windshield using adhesive. A vertical fine-wire multi-strand element, located between the glass laminations, is available as an option, except for North American Specification (NAS) vehicles, to de-ice and demist the windshield and is controlled from the Touch Screen Display (TSD). The backlight is 4 mm tempered glass, green tinted and heated and bonded to the liftgate using PU adhesive. The windshield and backlight, except for the convertible model, are direct glazed to the body.
The door glass on both models is a frameless system with 5 mm green tempered glass. Both the driver and passenger window glass is operated electrically and raised and lowered by a Bowden cable mechanism.
Each door glass automatically drops when the door is opened or when the convertible top is raised or lowered, and raises when either the door is shut or the top is fully raised and latched in position (glass drops fully on hood operation). The door glass can be closed via the Smart Key. Glass operation is internally controlled from switch packs located in the driver and passenger door arm rests via their respective control modules. The switch packs are illuminated when the sidelights are on.
CONTROL DIAGRAM
NOTE: A = Hardwired; N = CAN bus
PRINCIPLES OF OPERATION
The windshield and coupe backlight are supplied as assemblies complete with trim, which is directly bonded to the glass.
The convertible backlight is high frequency welded to the canopy and the outer seal is stitched and bonded to the top. On both models, the heated backlight remains on for 21 minutes after being switched on unless it is manually switched off before the time delay expires.
Front Door Glass Assembly
One-touch up operation causes the door glass to fully close unless an object is detected ('Anti-trap') or the glass is within 45 mm of top of travel when the door is opened. If the 'Anti-trap' regulator detects an object, the glass will drop fully open or to 200 mm below the obstruction. All door glass operates with the ignition in either 'Accessory' mode or 'On' mode and after the ignition enters 'Off' mode, until either door is opened.
The front windows must be programmed for one-touch operation in order for the convertible top to operate correctly. Failure to program the windows results in a 10 second opening delay once the top is unlatched. The windows can be manually programmed for one-touch operation using the following procedure:
- Engine running
- Raise window up to the top seal and release switch
- Raise again until window stops moving
- Release switch
- Raise again
- Lower window fully
- Release switch
- Press lower for a further 0.5 seconds until a relay is heard to CLICK
NOTE: Before commencing work within a door interior, all Warnings and Notes within the appropriate Removal and Installation procedures must be read and fully understood.
To re-learn the glass operating characteristics, the associated door must be closed (door ajar switch inactive). The glass must then be driven fully down and held stalled at the bottom of its travel for a minimum of 1 second. The glass is finally driven to the fully up position and held stalled for a minimum of 1 second. The re-learning procedure must also be accomplished to regain the automatic glass closing sequence.
REAR QUARTER GLASS
The coupe rear quarter glass is a fixed 4 mm, tempered, green-tinted unit fitted by a single bolt fixing on the lower front corner of the glass assembly, and a pin into the body at the rear.
Convertible Rear Quarter Glass Assembly
The rear quarter glass of the convertible is 5 mm, tempered, semi-flush and green tinted. A drum and wire system provides automatic full glass drop when the top is lowered. Rear glass control is incorporated in the convertible top switch, which is located in the roof console.
When lowering the rear quarters of the convertible at vehicle speeds up to 24 km/h (15 mph), failure to release the switch on operation of the audible alarm will result in lowering of the top.
Rear quarter glass is automatically powered to the bottom position when the top is lowered and further operation is inhibited until the top is raised and latched.
The rear quarters are operated automatically, up or down, when raising or lowering the convertible top. If the door glass is in the raised position when a request to close the top is made, the door glass and the rear quarters will be powered to the bottom of their travel. When the top is fully raised all glass will be powered up to close, rear quarters first followed by the door glass, forming a seal with the top.
If the front glass has been either fully or partially lowered manually, the rear quarters only will be powered up. If the power supply to the driver or passenger door module is disconnected (battery disconnected, module unplugged or fuse removed) then the glass/system must re-learn the glass operating characteristics. The last known glass position is regarded as top of travel by one touch operation until re-learning has taken place. One touch down, manual up and down control and the automatic lowering of the glass for door opening are unaffected.