Step 6 - Key Registration In Automatic Registration Mode

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

This must be done when you install a new transponder key ECU.
It is possible to register up to 2 master key codes and a sub key code.
In the automatic registration mode, the last key registered becomes sub-key.

Registration of a new transponder key.

NOTE:

When a key is not inserted in the key cylinder on the automatic registration mode, the security indicator always lights on.
When the immobilizer system operates normally and the key is pulled out, the security indicator blinks.
When key code registration could not be performed on the automatic registration mode, code 2-1 is output from the security indicator and when inserting the already registered key, code 2-2 is output.

Fig 1: Displaying Codes 2-1 & 2-2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Key Registration Procedure (Automatic Registration Mode)

Initial condition: Battery connected, no key in key cylinder.
Automatic registration mode completion
If completing the mode forcibly when more than 1 key code have been registered on the automatic registration mode, perform the following procedures.

After 1 more key code have been registered with master key, turn the ignition switch from LOCK to ON 5 times within 10 secs. after inserting the already registered key or without pulling the key out.