Can I program a transponder key for a 1999 Toyota Avalon XLS if I do not have a Working Master? I have a master that does not have a chip in it and a valet key that does have a chip?

Only the electric wiring diagram has 360 pages. Impossible to post anything of that here. Sorry

1 First you will need to purchase a blank Toyota transponder key. You can do this from the dealership, a locksmith, or an online source such as eBay. Once you have the key, take the blank key and the master key to a locksmith that he or she can duplicate the key. This will be much cheaper than the dealership.

2 Now that you have the newly cut key and the master key, you can program the Toyota transponder key. Sit in the driver's side of the Toyota vehicle. Press and release the brake and gas pedal simultaneously.

3 Insert the master transponder key. Do not turn it. Push and release the gas pedal 5 times within at least 15 seconds of inserting the master key.

4 Press and release the brake pedal 6 times within 20 seconds of completing step 3, then remove the master transponder key.

5 Insert the newly cut transponder key into the ignition, but do not turn. Press the gas pedal once.

6 Wait up to 2 minutes or whenever the security light on the dashboard turns off. Once the light goes off, remove the new transponder key and press the brake pedal once. The new transponder key should now be programmed. Test the key by attempting to start the engine. If the engine does not start, repeat the steps above.

If you can provide proof of ownership, most dealers will cut key from vin number. As long as you can provide title or something showing that the car belongs to you.

It's impossible to start the engine without the transponder chip inside the key.. Only way is to buy a new same type key n virginize ur ECU n reprogram ur ECU to recognize the new key unless u still keep the original master key to activate the add key for slave key.. Look for lock smith will do the job.

if you have checked all your fuses try tracing the wiring back to fuse box last time i had this problem it was in the wiring just out of the fuse box

The first thing to do is try another key. Perhaps your transponder key has failed.
You can identify a 'transponder key'; it has a wide part wher you turn it.

call the dealership with our serial number they will cut you a key that goes there just show proft ownership thanks .pierre

i would have a dealer look at it those alarms are very complicated..