I just purchased a 2008 Sienna and only received 1 key. It is the black master key. Being a cheapskate I didn't want to pay the dealer prices for a new key. I found new transponder key blanks, but is it possible to program them yourself, or does it require special equipment?
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Re: Transponder Key Programming
Keys are not all the same, it is possible the key you bought may not work, it should be searched by VIN by the dealer, and the dealer has to program with factory scan tool, should cost no more than .5 hours in labor.
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Is the new key a transponder key? My info says you have passkey 111.
A master key is black plastic headed key. this procedure may work. Valet key won't work.
Turn the key to run position, run position is just where the dash lites come on, and leave it there, the security lamp will illuminate for 10 minutes, when the lamp turns off, remove the key, repeat the above steps two more times, insert the key and turn to run-lamp should remain off to verify programming.
Do you have a master key ?
With a master passkey III key (Black), turn ON the ignition, with the engine OFF.
Observe the Security telltale, after approximately 10 minutes the telltale will turn off.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
With a scan tool, clear any DTCs.
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.
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.
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.
Press and release the brake pedal 6 times within 20 seconds of completing step 3, then remove the master transponder key.
Insert the newly cut transponder key into the ignition, but do not turn. Press the gas pedal once.
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.
Do you have any issues with your other key? There is a small RF transponder in your key that is transmitted to a module in your vehicle. When the module identifies a valid signal it will allow the vehicle to start. What happening is that your vehicle isn't identifying the key because the transponder signal is weak. I would speak to someone at the service department at the dealership where you purchased the vehicle and have them cut and program you a new key to replace your defective one.
This means that the programming of the Transponder Key has been corrupted or the Programming data of the Key in ECU ( Electric Control Unit ) has been lost or not responding. You now have to get a new Transponder Key. You can get it on E-bay for $30. After you receive it, reprogram the car to the New Transponder Key to the ECU ( the process in usually given in the instruction manual or in the Service Manual ). Then the car will start perfectly.