How do I obtain/pull the codes from the ECM

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Mar 14, 2004 | 06:20 PM

toolpusher

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Joined: Mar 2004

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From: Farmerville, LA, union

How do I obtain/pull the codes from the ECM

I have a 1990 prelude. I need to know the procedure to get the trouble codes from the ECM.

What does ODB mean?

This is the first Honda car I have ever owned.

I had no idea these cars would perform like they do!

Mar 14, 2004 | 06:47 PM

hOndafienD 04

Joined: Nov 2003

Posts: 2,783

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From: Linden, NJ, USA

snap on scanner!!! take it to a shop that has 1...

you got OBD1 which means "on board diagnostics"

Mar 14, 2004 | 06:56 PM

RHD_BB4T

Honda-Tech Member

Joined: Jan 2003

Posts: 545

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From: Burlington, NC, USA

Re: (hOndafienD 04)

I think that you are incorrect...

1990 = NON OBD

OBD-I came out in 1992 model Preludes if I'm not mistaken... please correct me if I'm wrong!

OBD = On Board Diagnostics (Mostly emissions related)

OBD-I : 92-96
OBD-II: 96-on

The years might be off by one or two though, that's just off the top of my head...

The NON-OBD ECU's should have the flashing LED to show you the indicated code.

dp.-

Mar 14, 2004 | 07:20 PM

jdmlude_dude

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Joined: Feb 2004

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From: Murfreesboro, TN, USA

Re: (RHD_BB4T)

there is a such thing as OBD-0. it is the first OBD setup... not sure if a 90 lude has it or not. I hvae heard of OBD-0 though.

Mar 14, 2004 | 07:21 PM

RAB

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Joined: Apr 2002

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From: Superior, CO

Re: (jdmlude_dude)

http://www.hondaprelude.to/art....html

Mar 14, 2004 | 09:04 PM

missdusty

Joined: Mar 2004

Posts: 4

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From: So. Cal, CA, USA

Re: How do I obtain/pull the codes from the ECM (toolpusher)

A 1990 Prelude is OBD-0

91 and older = OBD-0
92-96 = OBD-1
96 and up = OBD-2

On your ECU, (this works for crxs and civics, i'm not 100% sure it works it works with preludes) which is probably under your passenger side carpet (there is also probably a metal covering protecting the ECU which is held on by a few bolts) othere is a little red light that will blink if your check engine light is on. A long blink is a "10" and a short blink is a "1," so if it blinks "long long short short short" that is a code 23. I think that link will tell you what a few common codes mean, if not there are other links, probably easily accessible on this site.