Windows and Glass: Description and Operation
Glass, Frames And Mechanisms
Windshield Components
WINDSHIELD
The laminated windshield is bonded, and sealed, to the body aperture using PU sealant. Heat bonded to the inner surface of the screen is the optical unit for the rain sensor and the interior mirror-mounting boss.
Vertical fine-wire multi-strand elements are fitted between the glass laminations to de-ice and demist the screen. At the bottom of the screen six horizontal heating elements bonded to the interior glass surface prevent the wiper blades freezing to the screen during adverse weather conditions.
The shield is supplied with the heating element flat foil connectors fitted to a moulded sealed terminal block. This terminal block is wired to a connector for connecting to the vehicle harness.
REAR SCREEN
Rear Screen Components
The tempered glass tinted green rear window is bonded to the upper tail doorframe using PU sealant. Fitted to the inner surface of the rear screen are the heating elements and an extra FM antenna for diversity tuning, if fitted.
Two lucar terminals connect the heating element while a twin and single stud connector at the top of the screen connect the antenna to the vehicle.
WINDOW REGULATOR CONTROL
Windows Component Location
NOTE: LH drive shown, RH drive similar.
GENERAL
Electric windows are installed in all four doors. The driver's front window incorporates a self-contained 'Anti-trap' regulator, which features one-shot up and one-shot down functionality. All the passenger windows are hard wired and are powered via the window lift relay in the Central Junction Box (CJB).
Should any of the passenger windows have opposing up/down requests from two separate switches, for example, the drivers door switch and the switch on the operating window, then the operation of that window will cease, until one or both of the switches are released.
System Inputs and Outputs
Inputs
^ Ignition switch
^ Drivers door switch pack
^ Front passenger door window switch
^ Rear passenger door window switch (LH and RH)
^ Drivers door ajar switch
^ Front passenger door ajar switch
Outputs
^ CJB window enable signal
^ CJB window power feeds
^ Front window lift motors (LH and RH)
^ Rear window lift motors (LH and RH)
IGNITION SWITCH
The window lift system is enabled during ignition switch positions I and II, but is disabled during cranking.
WINDOW SWITCHES
Individual window switches are installed in each of the three passenger doors. Window switches for all windows are installed in the driver's door in the top surface of the trim casing.
All window switches are of the non-latching rocker type and contain illumination bulbs that operate when the side lamps or headlamps are on.
The driver's window switch has two switching positions in each direction, inch up/down and one-shot up/down. Operating the switch to the second detent position will activate the one-shot feature. All the passenger windows have conventional power motors, providing an inch up/down operation whilst the corresponding switch is held.
When the switches in the driver's door are used to operate the passenger windows or to isolate the rear windows, the driver's door switch pack outputs a signal to the relevant window regulator. While the isolator is engaged, the rear regulators ignore inputs from the rear window switches, and the driver's door switch pack illuminates a LED in the isolator switch.
With the switches in the rest position, there is battery voltage at both sides of each switch as well as at the window motors. Operating any switch provides a ground path through the switch to the window motor. Operating the switch in the opposite direction switches the voltage path and the ground path to the motor allowing the motor to run in the opposite direction.
Power for window operation is supplied from the window lift relay located in the CJB. When energised, the window lift relay provides feeds to the following fuses, which are also located in the CJB:
^ 7 (25 Amps)
^ 30 (25 Amps)
^ 17 (20 Amps)
^ 31 (20 Amps).
Driver's Door Window Switch Pack Pin Out Information
Connector C0081
Connector C0343
Connector C2654
Front Passenger's Door Window Switch Pin Out Information
Connector C0087
Rear Passenger's Door Window Switch Pin Out Information
Connector C0732
NOTE: T4 cannot be used to monitor the state of the window switches as they are part of a hard-wired circuit.
FRONT DOOR AJAR SWITCHES
Window operation is immediately disabled when a front door is opened during a 40 second timeout period. The door ajar switches are located in the front door latch mechanisms.
T4 can be used to monitor the state of the front door ajar switches.
ENABLE LINES
The use of enable lines limits the windows to operate when the ignition switch is in position I or II, and for a period of forty seconds once the ignition has been switched off. If the driver's door or the front passenger door is opened within the forty-second period, window operation will be disabled. No window operation is possible during vehicle cranking.
WINDOW REGULATORS
Cable operated window regulators powered by an electric motor are installed in each of the doors.
Front Window Regulators
The front window regulator and motor is supplied as an assembly and is handed. Each assembly comprises a front and rear runner, a continuous cable and a motor.
The runners are secured in the doorframe with six screws. The door glass is located in two carriers, which are located in tracks in the runners. The glass is retained in friction pads in each carrier and secured with clamp screws.
Each carrier is attached to the cable, which, in turn, is attached to a drum driven by the motor. When the motor is operated the drum pulls the cable in the required direction to raise or lower the glass.
Rear Window Regulators
The rear window regulator and motor is supplied as an assembly and is handed. Each assembly comprises a runner, a continuous cable and a motor.
The runner is secured in the doorframe with four screws. The door glass is located in a carrier located in a track in the runner. The glass is retained in friction pads in the carrier and secured with a clamp screw.
The carrier is attached to the cable, which, in turn, is attached to a drum driven by the motor. When the motor is operated, the drum pulls the cable in the required direction to raise or lower the glass.
ANTI-TRAP
The anti-trap function is enabled for the driver's window closing in both the inching and one-shot modes. If the anti-trap feature is activated while a window is closing, the window motor is reversed for 0.5 second.
A Hall sensor, located in the driver's window regulator, monitors the speed of the motor and if the speed decreases below a set threshold, indicating an obstruction, the power feed to the motor is reversed so the window goes back down.
In an emergency the anti-trap function can be overridden by holding the window switch in the one-shot closed position.
After the battery has been disconnected it is necessary to initialize the driver's door window motor to be able to operate the one-shot up function.
Driver's Door Window Motor Initialisation
^ Operate the drivers window switch until the window glass is in the fully closed position, continue to operate the window switch for a further two seconds
^ Release the window control switch
^ Operate the drivers window switch in the closed position and continue to operate the window switch for a further two seconds
^ Operate the drivers window switch until the window is in the fully open position (one-shot down)
NOTE: If the driver's window motor initialisation has been completed correctly, when the driver's window switch is operated, the window should move to the fully closed position (one-shot up) automatically. If the window does not fully close automatically (one-shot up), repeat the complete procedure.
^ Operate the driver's window switch once to the close position.
Driver's Door Anti-trap Regulator Pin Out Information
Connector C0740
WINDOW CONTROL DIAGRAM
NOTE: A = Hardwired
