Hi everyone.

I have a 1999 prelude with auto/tip-tronic transmision.

I dont have any key with immoblizer.

I bought p28 ecu + obd1 harness but it is not working.

Any one know whats the problem ?

I head p28 doesnt have immobilizer so i thought its gonna work.


Thanks

 

It doesn't turn on when you crank it, right?

Green immobilizer light flashes?

(Incidentally I'm not sure that your car would work either way with the setup you have, given that you're auto)

 

Yes the green light flashes.

Why its not gonna work ?

How can i make it to work ?

Thank you and i hope you guys can help me.

 

You got the wrong ecu, you need an automatic ecu.

 

Guy who was selling this ecu said its for auto trans.

Besides immobilizer light blinking there is also a D4 light blinking for trans.

Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silverusa &raquo;</TD></TR><TR><TD CLASS="quote">Guy who was selling this ecu said its for auto trans.

Besides immobilizer light blinking there is also a D4 light blinking for trans.

Thanks </TD></TR></TABLE>

There are 3 parts to the immobilizer setup. (Key, Immobilizer unit, ECU) You'll have to bypass the immobilizer itself to get the car to crank.

But I doubt the car will work anyway, since it's auto. (see blinking D4 light)

 

You don't have to bypass the immobilizer when installing a P28. I have a P28 NepTune RTP ECU in my car, and I didn't touch the immobilizer circuit. Perhaps he unplugged a part of the immobilizer (receiver, immobilizer unit, or something else, perhaps)?

I suspect it's because he's replacing an auto ECU, so the TCU is probably causing problems.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A Blue Lude &raquo;</TD></TR><TR><TD CLASS="quote">There are 3 parts to the immobilizer setup. (Key, Immobilizer unit, ECU) You'll have to bypass the immobilizer itself to get the car to crank.</TD></TR></TABLE>

Actually there are 4. The receiver is separate from the immobilizer unit itself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 117 &raquo;</TD></TR><TR><TD CLASS="quote">You don't have to bypass the immobilizer when installing a P28. I have a P28 NepTune RTP ECU in my car, and I didn't touch the immobilizer circuit. Perhaps he unplugged a part of the immobilizer (receiver, immobilizer unit, or something else, perhaps)?</TD></TR></TABLE>

Are you using your original (chipped) key though?

 

Yeah, stupid me. I missed the part where he's saying he doesn't have the proper key. You're right, he'll have to bypass the immobilizer. I imagine the D4 light is flashing because the TCU is looking for the auto ECU and it is not finding it.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A Blue Lude &raquo;</TD></TR><TR><TD CLASS="quote">Are you using your original (chipped) key though?</TD></TR></TABLE>

 

Yeah but i heard that obd1 ecu doesnt have immobilizer. ?

And that ecu supposed to be for auto trans and i think it is.

Thanks for help guys i need to get this car runing.

 

It doesn't matter if the ECU has an immobilizer circuit in it or not. The immobilizer unit itself will still function without the ECU.

It's for an auto trans from a different car, with a different auto trans (one without "manual" shifting), so the TCU is probably very different.

 

Hmm any idea how i can get this car to run ??

 

My mom has that lude with that trany its slow as hell gets smoke by b16 and it blow up once

 

I still didnt solve the problem please help.

Thank you

 

put the stock ecu back in.

 

And then what ?

I still need to bypass imobilizer some how.