Principles of Operation

Glass, Frames and Mechanisms

Principles of Operation

LH Front Window Operation

The LH front window control switch may be used to raise or lower all windows, or each individual side window may be controlled by the control switch located on each door panel.

The one-touch down feature will completely lower the LH front window when the LH front window control switch is pressed to the second detent and released. The one-touch down feature electronics are integral to the LH front window control switch.

When the one-touch down feature has been activated, it will stay on until one of the following conditions is met:

- The LH front window control switch is pulled to the UP position
- The LH front window control switch is released (OFF position) and then pressed to the DOWN position (first detent) or one-touch DOWN position (second detent)
- Seven seconds have elapsed since the one-touch down request was initiated

Passenger Window Lockout - SuperCab and SuperCrew Only

Passenger windows may be raised or lowered using the LH front window control switch or the corresponding passenger window control switch. Passenger window control switches receive power when the accessory delay relay is active and the LH front window lock switch is in the UNLOCK position. When the LH front window lock switch is in the LOCK position, the passenger windows will only operate from the LH front window control switch.

Rear Window Defrost (if equipped)

When the rear window defrost switch (integral to the HVAC module or Front Controls Interface Module (FCIM) if equipped with navigation system) is pressed and the engine is running, the HVAC will activate the rear window defrost relay located in the Battery Junction Box (BJB). When the rear window defrost relay is active, the rear window defrost grid will be energized and the rear window defrost status LED will be illuminated. For vehicles equipped with a power sliding rear window, the rear window defrost relay will not activate unless the rear sliding window glass is in the fully CLOSED position.

The HVAC module 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 15-minute timing function is completed

Feature inputs
- Ignition switch RUN position (12V on both RUN and RUN/ACC inputs)
- Rear window defrost switch (momentary contact to ground when switch is pressed)

Feature outputs
- Rear window defrost relay control (grounded when activated, open circuit when deactivated)

Delayed Accessory Power

The Smart Junction Box (SJB) controls power to the power windows and the roof opening panel (if equipped) with the accessory delay relay. Refer to the Wiring Diagrams for additional vehicle features powered by the accessory delay relay. The SJB activates the accessory delay relay whenever the ignition switch is in the RUN or the ACCESSORY position, or when the ignition switch is changed from RUN or ACCESSORY to the OFF/LOCK position and the LH and RH front doors are closed. Diagrams By Number

The SJB will deactivate the accessory delay 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.
- ten minutes have elapsed since the ignition switch was changed from ACC or RUN to the OFF/LOCK position.

Feature inputs
- LF door ajar switch (open circuit with door closed, grounded with door ajar)
- RF door ajar 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
- Accessory delay relay (control circuit grounded when activated, open circuit when deactivated)