Using 94-99 ECU to delete 00-01 immobilizer?

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138 views 18 replies 5 participants last post by NickTheMaximus 4d ago
2kteggyyy Discussion starter
10 posts · Joined 2026 #1 · Feb 13, 2026 Hello TI!

for context im trying to manual swap my 2000 teg.
my integra was one of the lucky ones to come with an immobilizer.

my goal is to get around the immobilizer in my swap and my idea is if i get an ECU from an integra that didnt have the immobilizer, put it in my vehicle, will my current ignition switch and key be able to start my car?

if simply changing the ECU doesnt bypass the immobilizer, what is my work around to achieve this?

am i going to have to take the whole ignition harness over from an older teg just to be able to bypass?

in the end though:
im fine with the immobilizer light being on i couldnt care.
im also fine with losing some security on my teg because immobilzer wouldnt exist.
the goal is to do a manual swap with a proper manual ECU.

and i pretty much understand everything else about the swap just the immobilizer part. since they only came on 00-01 models, its hard for me to find information on a work-around on this chassis.
owns
2000 Acura Integra

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jjkz24
5,109 posts · Joined 2006 #2 · Feb 16, 2026 Convert to OBD1
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Reply Like 2kteggyyy Discussion starter
10 posts · Joined 2026 #3 · Feb 16, 2026 how would i recieve engine codes then? and if i convert to OBD1 ecu immobilizer function stops correct? just need the OBD2B to OBD1 conversion harness?
owns 2000 Acura Integra
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42 posts · Joined 2004 #9 · 7d ago When I did the manual swap in my '01 with immobilizer, I replaced the ECU from a '99 manual and it worked just fine. No problems starting with my chipped key.

Edit: The immobilizer light also wasn't on.

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10 posts · Joined 2026 #14 · 7d ago that helps alot! thank you! did you have to touch anything on the ignition side? like where the key is and all that?
owns 2000 Acura Integra
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Noneed2hate
30 posts · Joined 2014 #10 · 7d ago (Edited) In a pinch, you can remove the immobilizer chip from your OBD2 ECU, but it will cause a CEL and will be unable to read codes from it until you jump the vacant immobilizer connections with a 5ohm resister IIRC. Car will still run and drive however at the end of the day.

Your best bet however as mentioned is to go to OBD1.