Circuit/System Description

The garage door opener (GDO) is a transmitter operating between 288 and 399 MHz. The GDO has 3 buttons that may be programmed for individual transmitter/receiver combinations to control up to 3 GDOs, security gates and lighting systems. Each button represents a transmitter code section of the transmitter, which operates separately from any other button and may be considered a separate transmitter. Battery voltage is provided to the GDO from the PCM fuse in the underhood fuse block.