Honda Civic Immobilizer Brake Code. Turn the ignition switch to the on position (ii). 4 terminal and body ground with the parking brake lever pulled, then released.
See this transmitter the same way a gatekeeper would ask for an entry code in case someone knocks on the door. This is an unique code for each vehicle, mean security code, so, show the vin at dealer and they could give this unlock code (sometimes youu need to pay for this service). Apparently the immobilizer is a chip on the ecu main board its soldered on there, you can break it off and start your car with a check engine light (this doesn't work on preludes apperently).