Ok. So I just inserted the Red key in my '97 Prelude and now my car wont start. I didnt realize this was the "learning key" and I wasnt suppost to use this to try to start my car. I thought it was just another spare key, it wasnt packaged and was in the ring with all the other keys. I tried using my Black key and my Grey key and now it wont work either. Now my question is, did I just erase the code on my Black and Grey key? Do I just need to reprogram my Black and Grey key with the Red key? Or did I just mess up my whole immobolizer system and I have to take everything to the dealer to get reprogramed? What happens when I insert the Red key in the ignition? If I'm going to do a stealth alarm install will the immobolizer be a problem? Any help is much appreciated! TIA!

 

Did you find out what you had to do?? Cause i have done the same thing.... :/

 

Each master and valet key has a transponder in its grip
that outputs an ID code when you insert the key into
the ignition switch. The immobilizer system uses this ID
code to determine whether or not to start the engine.
There are no batteries or other serviceable parts inside
the keys.
The learning key has a unique ID code that is matched
to the vehicle’s immobilizer control unit. It lets you
rewrite the immobilizer control unit to add programmed
ignition keys or to clear the transponder codes of lost
programmed ignition keys; it will not start the engine. If
you try to start the engine with the learning key, you
could damage the immobilizer control unit.
The learning key is given to the customer, sealed in its
plastic case. Advise your customer that the learning
key is a tool for the dealer; it will not start the engine.
Customers should keep the learning key sealed in its
plastic case and stored in a safe place.

CONSEQUENCES OF A LOST KEY
The programmed ignition keys and the learning key are
essential parts of the immobilizer system. If your
customer has lost one or both of these components,
the consequences could be costly. Here are some
typical situations you could encounter and the potential
consequences:
• Your customer has none of the programmed ignition
keys, but still has the learning key. The immobilizer
control unit must be replaced with the Immobilizer
Unit Set.
• Your customer has none of the programmed ignition
keys and no learning key. The immobilizer control
unit must be replaced with the Immobilizer Unit Set.
• Your customer has a programmed ignition key but no
learning key. You have limited ability to add ignition
keys (you can only use the Ilco Immobilizer Key
Code Duplicator), and you have no ability to clear
transponder codes of lost ignition keys from the
memory of the immobilizer control unit.
• You are replacing the ECM, and your customer has
a programmed ignition key but no learning key. You
need to also replace the immobilizer control unit.

 

Your customer accidentally inserted the
learning key into the ignition switch and,
shortly afterwards, inserted a programmed
ignition key.

Required items
Immobilizer unit set (refer to the parts catalog for P/N)
All programmed ignition keys (master, valet, T5)
Suitable key cutter and the key code for the vehicle (if cutting by code)
HDS and 1st Password
Ilco Immobilizer Key Code Duplicator (to recode T5 keys if needed)

Immobilizer set that comes with keys= $320.57 MSRP part#04809-S30-A02

 

or convert to obd1, cheaper too.