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Guest Message by DevFuse
 

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Anyone mapped the Immobiliser output?


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3 replies to this topic

#1 RXTurbo

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Posted 28 August 2005 - 11:53 PM

I am putting a MY99 EJ20 from an Impreza into my 93 wagon, replacing the EA. I have the full impreza wiring harness and the whole engine and immobiliser bits are wired into the wagon.

It refuses to start, I have concluded that the immobiliser is dead.

Has anyone been successful in mapping the output waveform that the immobiliser sends to the ecu? Is it just a squarewave, or is their serial data attached?

Need to find out so I can make a box to replicate the signal...

Thanks all

Ben

#2 Hondasucks

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Posted 30 August 2005 - 11:35 PM

I'm not sure about the Immobilizer in a Subaru, is this one of those things with the key with the chip in it? I know the older GM system (I forget the name for it) was nothing more than a certain value of resistor in the ignition key, if this resistor didn't match the value of the resistor in the computer, it would shut the fuel off after 2 seconds. There are boxes available that more or less just go through all the possible values, for people doing engine swaps and such, but I think on the GM system it gives you 3 or 5 tries and then it locks the system out for 15 minutes or something like that, so guess-and-check could take a while.

#3 RXTurbo

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Posted 31 August 2005 - 04:17 AM

Hey, the sube key contains an RFID tag and is programmed to suit the immobiliser - I think the chances of replicating that are slim to none...

I am going to get hold of an oscilloscope and try to measure the signal soonish...

#4 Hondasucks

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Posted 31 August 2005 - 11:37 PM

The big question is, is the immobilizer built into the computer? or is it a separate box, if it's a separate box, then you just have to figure out what sort of a "pass" signal it sends to the computer... If it's in the computer, you could possibly find a computer that doesn't have the immobilizer (I don't think the US models do...)




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