1998 Honda Prelude Owner's Manual - Page 70

Keys and Locks Learning Key If you attempt to use the learning key to start your vehicle's engine, it may cause a malfunction in the system that makes your master and valet keys unusable. If this happens, you should contact your Honda dealer. If you need a new key made, take the key number plate, the learning key, and all other keys that came with your vehicle to your Honda dealer. Immobilizer System The Immobilizer System protects your vehicle from theft. A properlycoded ignition key must be used in the ignition switch for the engine to start. If an improperly-coded key (or other device) is used, the engine's starting circuit is disabled. When you turn the ignition switch to ON (II), the Immobilizer System indicator should come on for a few seconds, then go out. If the indicator starts to blink, it means the system does not recognize the coding of the key. Turn the ignition switch to LOCK (0), remove the key, reinsert it, and turn the switch to ON (II) again. If the system repeatedly does not recognize the coding of your key, contact your Honda dealer. CONTINUED Instruments and Controls You should also receive a small case containing a learning key. It is used by the Honda dealer to code replacement keys to your vehicle's Immobilizer System. It must not be used in your vehicle's ignition switch. Store the learning key with the key number plate in a safe place.