Toyota Rav4 1996 : car battery changed and since then the remote central locking has not worked from the handset but central locks from the inside using the switch. I have changed the battery in the handset but still not working. The handset has one red and one black switch, and a slider thing on the right hand side. Someone said you have to hold down one of the buttons for 30 seconds but I did this with both buttons and nothing happened. Please help!!!!

1. With the key out of the ignition, unlock and open drivers door (all other doors must be closed)
2. Within 5 seconds,
Insert the key into the ignition (Do NOT Turn it) and Pull key out.
Insert the key into the ignition (Do NOT Turn it) and Pull key out.
3. Within 40 seconds,
Close then open the drivers door.
Close then open the drivers door.
Insert the key into the ignition (Do NOT Turn it) and Pull key out.
4. Within 40 seconds.
Close then open the drivers door.
Close then open the drivers door.
Insert the key into ignition and leave it in the ignition.
Close the drivers door. Turn the ignition to ON then back to OFF (Do NOT Start or crank engine).
Remove the key from the ignition.
5. Within 3 seconds, the power door locks should lock then unlock automatically indicating successful entry into programming mode. Return to step 1 if the door locks do not cycle at this point or try the alternate procedure listed below.
6. Within 40 second,
A. Press the lock and unlock buttons on the remote simultaneously for 1.5 seconds.
B. Immediately after letting go of the lock and unlock buttons, press and hold the lock button by itself.
Within 10 seconds, the door locks should lock and then unlock once indicating successful programming.
(If the door locks cycle twice, repeat steps A and B in step 6 as the remote was not accepted)
Repeat steps A and B in step 6 for each new remote.
7. Open drivers door.

Your remotes may need to have batteries replaced and re-programmed.