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Bypass Immobilizer Without Using Module

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=90057
Printed Date: July 30, 2021 at 1:55 AM


Topic: Bypass Immobilizer Without Using Module

Posted By: MX6boii
Subject: Bypass Immobilizer Without Using Module
Date Posted: February 04, 2007 at 5:14 PM

I was checking out a remote start installation on a '00 Civic and was shocked to see this guy rig up his own immobilizer bypass. From the looks of it, all he did was solder the neccessary wires for the bypass right onto the key.

Is that technically what most universal bypass modules do? Just creates an electrical connection through the key and all the wires tap into it. How does this work?

Thanks.



Replies:

Posted By: mikvot
Date Posted: February 04, 2007 at 10:05 PM
In the case of the honda and many other vehicles they use the transponder system. This means, that inside the key, there is a chip that sends an rf (not electrical) signal to the ignition. If the ignition does not see the signal, then the car will not fire.I havent ever used the method he used but have seen diagrams on how to do it....

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Posted By: MX6boii
Date Posted: February 04, 2007 at 10:38 PM
I know how the system works. I just want to know how he did it. Could I get the diagram that you've seen?





Posted By: JWorm
Date Posted: February 04, 2007 at 11:07 PM
First of all, a 2000 Civic doesn't have a transponder key. That started on the Civic in 2001.

Assuming it was a 2001 or newer Civic you are talking about...

Take a relay...
86 - constant
85 - (-) when running
87 - connect a really long wire here. Usually about 6-8 feet, and something around 20 to 22 gauge works best. Have that wire wrap around the head of the key at least 8 times. Spread out the windings so you cover the whole head of the key. Continue to run the wire up to the key cylinder where you wrap the wire around the immobilizer ring...at least 3 times, but the more the better. Then have the wire run down to the relay and connect it to terminal 30.

Its hard to explain, but hopefully you understand. If someone has a picture, it would be easier. Its really how a 556U works without the fancy plastic box to put the key in.




Posted By: MX6boii
Date Posted: February 04, 2007 at 11:18 PM
Interesting, thanks JWorm.

Do you wrap the key using bare wire or still insulated? Is the signal transmitted through the wire, so the more windings the stronger the signal?

This is not something I would do. I'm just interested in the theory of it.

Thanks again.




Posted By: captainzab
Date Posted: February 04, 2007 at 11:25 PM
the wire wrapped around the key is insulated
i use that very thin telephone size wire.
I wrap the key and the key cylinder real good.

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Posted By: coach1962
Date Posted: February 05, 2007 at 9:47 AM
I just finished doing this on a 2006 T 4Runner. I had also done this on a 98 Honda Accord. I have a PDF file that shows one way to do it. I'm not sure where I got it from, but it is basicly the same way I did it last time on the Honda. I don't know how to upload a PDF file to this site.

Coach




Posted By: MX6boii
Date Posted: February 05, 2007 at 3:21 PM
Coach,

I'll PM you my email, thanks.




Posted By: JWorm
Date Posted: February 05, 2007 at 5:23 PM
coach1962 wrote:

I just finished doing this on a 2006 T 4Runner. I had also done this on a 98 Honda Accord. I have a PDF file that shows one way to do it. I'm not sure where I got it from, but it is basicly the same way I did it last time on the Honda. I don't know how to upload a PDF file to this site.

Coach


Its easy. Go here: Link
Then scroll down to the bottom and click on "Add New File"




Posted By: coach1962
Date Posted: February 05, 2007 at 7:16 PM
Jworm,

Thanks, I think I added the PDF file.

Coach




Posted By: the12volt
Date Posted: February 05, 2007 at 7:21 PM
You must be a Standard member to upload to the downloads section. There is an email link at the bottom of the page to send the file if you are not yet a Standard member.

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Posted By: the12volt
Date Posted: February 05, 2007 at 7:36 PM
coach1962, your file has been added to the downloads section. https://www.the12volt.com/installbay/downloads.asp?srch=all&term=Transponder+Bypass+with+Key+and+Relay

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