Procedure to program a 1998 Mitsubishi Diamante: 1) Open the drivers door 2) Turn the ignition key ON (without starting the vehicle) 3) Press and hold the programming button (located under the dash). In 20 seconds the system will start to cycle the doors and siren 3 times to indicate the system has entered the transmitter learn mode (do NOT release the programming button) 4) Press the 1st button on the un-programmed transmitter. The system will respond by cycling the doors and siren one time to indicate the transmitter has been learned. 5) All other transmitters (up to 4) also need to be programmed at this time 6) Programming is now complete, let go of the programming button and turn the ignition off to exit learn mode.
the dealer does it with a scan tool
On the inside of the keyless entry remote or sometimes on the back it explains how to do this. I believe you hold the unlock button along with the lock button for 7 seconds near the car. It will explain it on the inside of the keyless entry remote.
Take the remote apart and it says to push the buttons once each or twice each try this
My understanding is that you need to have it done at the dealer. There is no way of "cloning" an existing remote onto a second OEM one without dealer tools.
It can have power locks with out keyless.
There should a programming guide in the users manual
Your remote might need replaced, the buttons are probably worn out. They usually don't last for 10 years!
The location of the remote keyless entry module on a 1998 Saturn is in the rear of the passenger compartment. It is underneath the trim at about shoulder height by the right rear seat.
Try turning the ignition on and off about 10 times until the door locks, lock and unlock, then lock with the remote done.
To program a keyless remote for a 1998 Nissan 200SX SE-R, first, sit in the driver's seat and close all the doors. Insert the key into the ignition and turn it to the "On" position, then back to "Off" five times within 10 seconds. After the fifth time, the doors should lock and unlock, indicating you’re in programming mode. Press any button on the remote to program it; the doors will lock and unlock again to confirm successful programming. Repeat this step for additional remotes.
Open the trunk with the master key.
To program a 1998 Lexus GS 300 key, you typically need to use the keyless entry remote. Start by inserting the key into the ignition and turning it to the "On" position (not starting the engine) and then back off, repeating this process five times. After the fifth turn, the doors should lock and unlock to indicate the programming mode is active. Press the "Lock" button on the remote within 30 seconds to program it; the doors will again lock and unlock to confirm successful programming.