Garage Door Opener Transmitter: Description and Operation

GARAGE DOOR OPENER DESCRIPTION AND OPERATION

The garage door opener is located in the overhead console or drivers side sunshade. The valet switch (if equipped) provides battery voltage to the garage door opener. If battery voltage is lost due to a condition such as a dead battery, the garage door opener (GDO) unit relies on the non-serviceable internal power backup supply. For Buick LaCrosse/Allure the GDO unit does not have power unless the ignition key is in the ON position. The ignition key must be in the on position for Buick LaCrosse/Allure for the GDO to program. The unit is programmed using the customer's hand-held transmitters for the garage doors, electric entrance gates, or lighting and security systems.

The garage door opener is rolling code capable. Rolling code is a system that allows the code that the customers receiver receives from the garage door opener to change every time the garage door opener is used within operating range of the receiver. Rolling code programming requires the customer to push a learn/program button on the GDO receiver at their home. This button is usually located on the receiver unit under a cover (light cover) on one end of the unit. The customer must follow the GDO manufacturers instructions to program/learn the receiver to accept the HomeLink as an authorized opener for their unit. When the receiver and the garage door opener are initially programmed together, a code is established and a new code is created for every new transmission. The software in the receiver recognizes the garage door opener and accepts the new code.

The garage door opener is compatible with most, but not all types and brands of transmitters. If a problem should occur with a compatibility conflict with a transmitter, call HomeLink(TM) at 1-800-355-3515.

The garage door opener is a transmitter operating between 288-399 MHz. The power and range of the transmitter is limited to comply with laws governing the generation of radio frequency interference (RFI). The transmitter is programmed by the user to accept the signal generated by the user's transmitters, refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.

The garage door opener has 3 buttons that may be programmed for individual transmitter/receiver combinations to control up to 3 garage door openers, 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. Operation consists of simply pressing a button to activate the corresponding transmitter.

Battery voltage is provided to the garage door opener from the IGN SEN fuse in the instrument panel (I/P) fuse block. The garage door opener is grounded through G400. Inadvertent power is supplied from the body control module (BCM), except Buick LaCrosse/Allure.