Garage Door Transmitter - Reprogramming Procedure
NO.: TSB-97-00-003DATE: April, 1997
MODEL: See below
SUBJECT:
HOMELINK(R) ROLLING CODE PROGRAMMING
PURPOSE
The HomeLink(R) Universal Transmitter system is available as optional equipment on affected vehicles. Refer to TSB-96-00-001, issued January, 1996 for details on the HomeLink(R) system. This bulletin describes how to reprogram the HomeLink� transmitter for a garage door opener with a rolling code system.
Rolling codes change the code of a garage door opener every time the garage door is opened or closed. Rolling codes give an added level of security by changing the transmitter and receiver code every time they are activated. This makes it impossible to open the garage door using a copied transmitter signal.
BACKGROUND INFORMATION
Garage door openers with a rolling code system have been manufactured since 1995. They will appear to program the HomeLink(R) Universal Transmitter, but will not activate the garage door until programmed as described in this bulletin.
Serial and rolling values are programmed into the original transmitter during production. The receiver learns the transmitter's values when the garage door opener is installed. Garage door openers with a rolling code system typically have a unique fixed serial number that is paired with a rolling value that changes every time the transmitter button is pressed. The rolling value is from a range of approximately 65,500 values. The transmitted value changes with each press of the transmitter button. There is no distinguishable pattern to allow predicting future values.
When the transmitter is activated, it goes through a coding routine which varies depending on the garage door opener manufacturer. The receiver can then decode the incoming value it receives from the transmitter. It checks the serial number and rolling value. if they match, the receiver activates the garage door opener. On rolling code garage door openers, the receiver locks out rolling values that have already been used (which may have been copied).
AFFECTED VEHICLES
^ 1995-97 Galant
^ 1996-97 Eclipse
^ 1995-97 3000GT Spyder
^ 1997 Diamante
PROCEDURE
To program a garage door opener with a rolling code system to recognize the HomeLink(R) Universal Transmitter:
1. First program the transmitter to learn the garage door opener's transmitter. Refer to TSB-00-001, issued January, 1996 for details on HomeLink(R) memory programming.
2. Press the training button on the garage door opener receiver for one to two seconds. (The location and color of the button may vary depending on the manufacturer.)
3. Press the programmed HomeLink(R) button for the duration of the rapid flash, until the training light turns solid (about two seconds).
4. Release the HomeLink(R) button and press it again to complete the programming.
The HomeLink(R) Universal Transmitter can now be used to activate the garage door with rolling codes.
For assistance in programming the HomeLink(R) Universal Transmitter, call HomeLink(R) customer assistance at 800-355-3515.