LH and RH Front Power Window Control
The LH and RH front door window motors have integral electronics and must be initialized whenever a new window motor has been installed. Initialization is required to learn the full UP position and the profile of the glass as it travels through the glass channel. Once initialized, one-touch up (and obstacle detection) is enabled. When mechanical repairs have been carried out on the window regulator or glass run, the window motor must be de-initialized, and then initialized. The window control switch sends 2 separate signals to the window motor: up and down. When the window control switch is pressed to the first detent position, a 12-volt signal is sent to the window motor to request an up or down operation. When one-touch up or one-touch down is requested (switch pressed to the second detent position), the window control switch provides a 12-volt signal on both the up and down line simultaneously. During an one-touch up or down request, the window motor determines intended window direction by the signal first received. If the window control switch is pressed too quickly to the second detent position (less than 5 milliseconds of time between first detent signal and second detent signal), the window motor is not able to determine the intended direction request and cannot operate until the window control switch is released and pressed again. The up and down contacts are floating within the window control switch when the switch is in the neutral position. The up and down feeds to the window motor are all low current.
The LH and RH front window motors operate when the delayed accessory relay is active. The high current required to move the front windows are supplied through the B+ and motor ground input.
When the LH or RH front window motor is operating in one-touch up or down mode, movement of the front window can be stopped by pressing the switch to any position (UP, DOWN, auto UP, auto DOWN). The front window control switches must be released before the window can move again.
A new LH or RH front window motor cannot operate in one-touch up mode and the bounce-back feature is disabled prior to initialization. If the switch is actuated to the auto UP position and released, window movement stops when the up contact in the front window control switch is released. If the front window motor is removed from the window regulator drum housing, or if a new front window motor is installed, it must be initialized. Refer to WINDOW MOTOR INITIALIZATION .
The front window motors automatically adjust to system changes throughout its life: changes in seal drag and slight changes in the full OPEN position occur and are automatically compensated for. Once initialized, the window motor soft stalls into the lower position contributing to extended durability of the system. If the window does not seal completely in the full UP position (very small gaps/non bounce-back events only), the window switch can be actuated to the UP position to energize the window motor for a fraction of a second to fully seal and this new position is learned.