Global Window Operation

The global window switch is part of the memory heated seat switch assembly and is an input to the driver door module (DDM). When the switch is operated to the up or down direction the up or down switch signal circuit is closed to the battery positive reference voltage. In an active state the up or down switch signal circuit voltage is supplied to the DDM through one of the 806 ohm resistors within the switch assembly. The resistors in the switch assembly enables the DDM to recognize an invalid switch signal. During a global window down function the DDM operates the driver window express down and signals the passenger door module (PDM) and body control module (BCM) with a Class 2 message to operate all passenger windows express down. The SUT model midgate window is controlled by the midgate module. The DDM signals the midgate module to operate the midgate window through up and down 12-volt signal circuits. During a global window down function the DDM applies a momentary 12-volt down signal to the midgate module to activate the midgate window express down function. During a global window up function the DDM, PDM, and BCM will operate the driver and passenger windows up only while the up switch is active. The midgate window has an anti-pinch feature so when the midgate module sees the momentary 12-volt signal on the up circuit from the DDM the express up function will be performed.