Easy guide to program smart key on a Honda Civic year 2015 when all keys lost by using Xtool X100 Pad2 key programmer via OBD within 3 minutes.
Procedure:
Connect X100 Pad2 with vehicle diagnostic socket through main test cable
Select car brand Honda/Acura->Smart key system->Type 3 (button) key->All smart keys lost



Take all smart keys out of the car

Put 1st smart key into car

Press on Start button for twice, check whether the ignition can be switched on
Press YES to continue

Enter number of smart keys to be programmed: 2

Take smart key out of the car

Put a new smart key into the car

Turn ignition off
Then turn ignition on within 15 seconds
Check security indicator light goes off


Turn ignition off
Switch ignition on within 15 seconds
Turn ignition off
Switch ignition on within 15 seconds
Xtool X100 Pad 2 programs Civic 2015 smart key success


Test the new smart keys.
Xtool X100 Pad2 Program Honda Civic 2015 Smart Key All Keys Lost