Add One New Key/Keyless Transmitter

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

Have a registered key, a new immobilizer key, and the first password from the iN system.
Connect the HDS to the data link connector.
Turn the ignition switch to ON (II).
Select IMMOBI from the SYSTEM SELECT menu, then select IMMOBILIZER SETUP.
Select Add and Delete keys, then Add 1 key.
Do the registration according to the instructions on the HDS screen.
Check if the engine can be started with the newly registered key.
When prompted by the HDS, do the keyless transmitter programming.