MinnesotaTuner

Hey guys, first time poster long time lurker.

To get right to it, I own a 2000 prelude with a 96 JDM crate H22A motor in it. Everything was converted to OBD1 but since we left the existing harness in just ended up using a a OBD2-obd1 conversion harness which is hooked up to a chipped p28 but I also have a chipped p72 too.

That's just a little about my car. Now the issue. The last day of my build, and 30 hours working on it, I decided to tune the ECU on my laptop. Everything went smooth so I called it a night and went to bed. The next morning I woke up and was unable to find my keys. They literally disappeared into the void but I remembered I had the "RED" key. So I used that to open my doors to look inside. Invade I locked my keys in the car. .... Couldn't find them. So I'm freaking out. I recall that you are not suppose to use the "RED" key in the ignition because I have some clue of what it does. So first I disconnect the 2 plugs off the immobilizer and then tried to crank it.

Now when I say cranking I mean, trying to start the car but every time I start the car everything goes dead I don't even hear the starter relay trying to click
Nothing happened. No I got the idea to get a blank, non-transponder copy of it and I hooked the immobilizer back up. At this point I tried cranking with it hooked up, nothing happened, then I tried with it disconnected, nothing happened.

Now I'm running out of options. I call My club member at Honda and he texts me the immobilizer break code for my car. So I then try that with the blank. Nothing happens.

On top of that I'm not even getting a green blinking key light when I use the non chipped key..... So WHAT HAPPENEDED TO MY BLINKING LIGHT?? Everything else kicks on like my ECU light, that then goes away like normal and my fuel pump kicks on. But when I turn the key I do no even get a crank. Everything cuts off. My Volt gauge reads 12 on ACC position but when I try to cran, all of the lights turn off and it drops to 0.

Basically the moral of this story, and thanks for reading all the way through, is that I'm lost.
What can I do to bypass this thing?
Why am I not getting a green key light when I turn the ignition?
Why isn't my starter working?
Is there a non cost way to bypass?
Can the red key **** up my ECU?

I heard of someone bypassing the immobilizer with a s2k push start. Is this true? And if so how? I do have a eBay push start I could use.

Any answers would be appreciated. Thanks!

v4lu3s

What ecu is in the car? How do you still have an immobilizer if you are running an obd1 ecu?

raverx3m

iTrader: (1)

doesn't prelude have immobilizer outside the ecu as well
its a multipart setup.
theres also this box that's coded to the keys which sends signal to ecu

JRCivic1

If you have an OBD-1 ECU plugged into the car, the immobilizer no longer functions. If you have some type of aftermarket ignition kill switch or alarm system... you may have to diagnose and fix that system first before proceeding. My suspicion is that you have a dead short in the battery... which only shows under load. Try another car battery. If that works, my next step would be to check the clutch switch pad on the clutch pedal to make sure you are able to start the car when you turn the key. IF the symptoms stay the same if you try to start the car with the clutch depressed first and then left up second... your problem is the clutch switch/pad.

94dxcoupe

The 97-01 Prelude's have an immobilizer system that includes the chipped key, ignition ring, ECU's immobilizer, and IMMOBILIZER CONTROL UNIT.

You've already bypassed the ECU immobilizer by installing the OBD1 ECU, but you still need to bypass the Immobilizer control unit for the starter to work: 97-01 Honda Prelude Starter Bypass Information