Operation CHARM: Car repair manuals for everyone.

System Description






The glass, frames and mechanisms include:
^ standard plastic and laminate safety glass
^ liftgate glass which houses the rear defogger grid
^ windshield glass which is bonded to the opening flange with a urethane sealant
^ standard power windows which include one-touch down and lock out feature
^ power vented rear quarter windows
^ RH quarter window glass antenna

The window regulator control switch:
^ is located on each door trim panel.
^ may be used to raise or lower all windows from the master. control on the driver side, or the individual side window from the individual door switch.
^ includes a double detent feature.
^ can manually lower the driver side window when the master control is depressed halfway (first detent).
^ will completely lower the driver side window when the master control is fully depressed and then released (second detent).
^ can lock out passenger front and rear control switches.

The rear quarter glass regulator control switches:
^ are located in the overhead console.
^ may be used to open and close the RH or LH rear quarter windows.
^ stop the rear quarter glass in any position when released.

The power window system will operate if the ignition switch is in the RUN or ACC position, or the delayed accessory feature is active.

The Generic Electronic Module (GEM) controls the opening of the LF driver side power window (window down motion) by activating the One-Touch Down (OTD) relay.

There are two modes of window down operation: manual mode and auto mode. The manual mode is selected by pressing the LF window switch to the first (down) position. In manual mode the window will move downward only while the switch is depressed. When the LF window switch is pressed to the second (down) position, it enters auto mode and the window will open completely with just a momentary press of the switch.

The GEM will activate the OTD Relay until one of the following conditions is met:
^ The LF regulator control switch is pushed to the UP position.
^ The LF regulator control switch is released (OFF position) and then moved to the down position (first detent) or one-touch down (OTD) position (second detent).
^ Seven seconds have elapsed since the OTD was initiated.
^ A window regulator electric drive stall condition is detected on the one-touch down sense line inputs.

The UP window operation is not controlled by the GEM. The feature is activated when the delayed accessory is active and the LF window regulator control switch is pressed to the UP position. The switch provides delayed accessory power to one side of the motor and ground to the other side through the one-touch down relay. The one-touch down relay is not active when the LF regulator control switch is in the UP position.

Passenger windows may be raised or lowered using the LF master control switches or the appropriate passenger window switch. Passenger window switches receive power when the delayed accessory relay is active and the LF remote lock-out switch is in the UNLOCK position. When in the LOCK-OUT position, the passenger windows are deactivated.

The GEM controls manual down and auto down window movement with the down window relay. The relay is activated by applying ground directly to one side of the down window relay coil, and deactivated by removing the ground signal

The delayed accessory relay provides power for the operation of the power windows and the power moon roof. The delayed accessory feature is active when the ignition switch is in the RUN or the ACC position, or when the ignition switch is changed from RUN or ACC to the OFF/LOCK position and the LF and RF doors are closed.

The GEM will deactivate the delayed accessory feature when:
^ the LF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
^ the RF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
^ 10 minutes have elapsed since the ignition switch was changed from ACC or RUN to the OFF/LOCK position.

Feature inputs:
^ LF door open warning switch (open circuit with door closed, grounded with door ajar)
^ RF door open warning switch (open circuit with door closed, grounded with door ajar)
^ ignition switch RUN position (battery potential on both the RUN and RUN/ACC inputs)
^ ignition switch ACC position (battery potential on the RUN/ACC input)
^ ignition switch OFF/LOCK position (absence of battery potential on the RUN, RUN/ACC, and START inputs)

Feature outputs:
^ delayed accessory relay (grounded when activated, open circuit when deactivated)

The GEM controls the rear window defrost grid and heated mirrors by controlling the state of the rear window defrost/mirror relay. When the rear window defrost switch is pressed, the GEM will activate the heated grid relay. When the heated grid relay is active, both the rear window defrost grid and heated mirror elements will be energized.

The GEM will deactivate the heated grid relay when one of the following conditions is met:
^ The rear window defrost switch is pressed when the feature is active.
^ Ignition switch state is changed from RUN to OFF/LOCK.
^ The 10 minute timing function is completed. Feature inputs:
^ ignition switch RUN position (12V on both RUN and RUN/ACC inputs)
^ rear window defrost/mirror switch (momentary contact to ground when switch is pressed)

Feature outputs:
^ rear window defrost/mirror relay control (grounded when activated, open circuit when deactivated)