After programming my remote on a 2000 Avalon it lasts only about a week?

About 2 month ago I bought a 2000 Avalon. I received 1 remote which didn't work at the time. Each time I program the remote it lasts for a week or two and than stops working. I don't think It's the battery because it works from quite far (when it does). Is it a faulty remote or something with the car?

After programming my remote on a 2000 Avalon it lasts only about a week?
Try this procedure:





1. Start with key out of the ignition, driver door is open (all others closed),


and driver door is unlocked.











2. Insert key into the ignition (don’t turn it) and pull it out











3. Perform these steps within 40 seconds:





a. Using the power lock switch on the driver’s door, perform 5 lock/unlock cycles with lock.





Use an even pace and try to go about one cycle per second. 1 cycle = 1 lock and 1 unlock)





b. Close, then open driver’s door.











4. Perform these steps within 40 seconds:





a. Using the power lock switch on the driver’s door, perform 5 lock/unlock cycles starting


with lock.


Use an even pace and try to go about one cycle per second. (1 cycle = 1 lock and 1unlock)





b. Insert the key in the ignition cylinder.





c. Turn the ignition to ON (as far as you can without cranking the engine) then back to OFF








d. Remove the key from the ignition.











5. Within 3 seconds, the power door locks should cycle automatically indicating successful entry


into programming mode.


Return to step 1 if the locks do not cycle at this point.











6. Perform these steps within 40 seconds:





a. Press the lock and unlock buttons on the transmitter simultaneously for 1 second.





b. Immediately after letting go of the lock and unlock buttons, hit the lock button by itself and


hold for 2 seconds. Within 3 seconds, the door locks should cycle once indicating successful


programming.


If the door locks don’t cycle, or cycle twice, repeat steps a and b-your remote has not


been accepted.





c. Repeat steps a and b in step 6 for each new transmitter.











7. Close driver door.
Reply:That year model actually could have come equipped with two kinds of remotes. The "Toyota factory" remote or a "TDS" or "Southeast" remote. What does your remote look like? A rectangle shaped,a football shaped or a banana/boomerrang shaped?