Toyota & Lexus On-Board Programming Method #2
Programming additional Master Key (when 1 working master is present)
- Insert working master key into ignition lock cylinder.
- Get in car & close all the doors. (Do not lock them.)
- Turn the working master key ON (do not crank) to OFF five times. (finishing with key in the OFF position.)
- Open and close the Driver’s door six times quickly. (finishing with door closed.)
- Insert the new transponder key into the ignition.
- Turn the new transponder key to the ON position and leave it there for 1 minute.
- The security light usually will shut off at this time but not always.
- After the one minute the programming is complete. Make sure to test the new key to ensure it operates the vehicle.
During step 6-7 if the immo light is flashing then there is a problem with the key. Its either already programmed or incompatible. There are different flashes to say which is which but I dont remember the patterns at this time. Just know, it means there is no need to continue the process.