Usually when you need to add an additional key to the vehicle or all keys are lost you need to use some kind of key or transponder.

Transponder inside of the key should be with a special content in order for future programming by diagnostics to be possible.

“Production” utility provides the ability to program an empty (brand new) transponder as at transponder ready for acceptance by the immobilizer system of the vehicle.

Transponders applicable for this utility are virgin Texas 4D transponders or TPX2 transponders. Only for preparation of “Emergency 4C” key you will need a TPX1 transponder.

While transponder preparation is in progress you have a choice to select what kind of key you need to prepare – master key or sub key and also for what model vehicle it is intended.

Please take into account that the following rules are applicable for all Toyota/Lexus/Scion vehicles:

• at least one MASTER key should be registered in the immobilizer system

• MASTER key should be first programmed i.e. after reset of the immobilizer system first key programmed should be a MASTER

• In many cases immobilizers need registration of at least of two keys to finalize the learning process

We want to point out that in many cases keys ordered from Toyota/Lexus/Scion dealers can not be used after reset of immobilizer system. Reason for this is that these keys in most cases are SLAVE keys and can be used only if an MASTER key has been programmed before. With this utility you can prepare a new Texas 4D transponder as a MASTER key.

Another important issue is that once a transponder is programmed as ID67, ID68 or ID70 it can not be used for second programming i.e. it can not change its type. This is because ID67,ID68 and ID70 transponders are with locked data fields after preparation.