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Volkswagen Jetta, Golf, GTI: 1993-1999, Cabrio 1995-2002 (A3) Jetta ECM


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Last Post: Jul 17, 2014 8:25 PM Last Post By: No nickname sel...
revn2go

Posts: 3
Registered: 12/09/03
Jetta ECM
Posted: Feb 2, 2003 11:40 PM
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Jetta ECM Tom Jennings revn2go jennings55@charter.net
A few questions: Recently my 96 jetta developed a starting problem (It wouldn't). The dealer told me the ECM,Coil and Distributor had been ruined by water which had leaked into the ignition coil.

Replacing the distributor and coil were no problem (thanks to your manual) The ECM however was over $600.00! I found a used ECM which seems to work fine, but likely needs the readiness codes reinstalled since the check engine light is still on.

My question is that the origional ECM (Part # 037-906-259J) had a J on the end. The replacement had no letter prefix. A copy of a 1996 VW "Service Action" suggested replacing the ECM with a new unit with a prefix of X. Are the ECMs all the same? I assume the prefix designates the manufacture date or software rev?

wohlfarth

Posts: 1,744
Registered: 10/31/03
RE: Jetta ECM
Posted: Feb 21, 2003 12:05 AM   in response to: revn2go in response to: revn2go
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RE: Jetta ECM Stan Wohlfarth stan.wohlfarth@bentleypublishers.com
Tom,

The letter on the end (suffix) of the ECM part number does indicate the
particular revision number as well as specific application (engine,
production by VIN#, etc.)

If the used ECM you have in is running good then I would suggest just
resetting the readiness codes and seeing if the check engine light goes
away.

I'll attach a pdf file from the VW parts system (ETKA) that lists the
various ECMs for a '96 Jetta. They are broken down by applicable VIN# and
engine codes. This won't show up on the tech board but I will copy your
e-mail directly so you get the attachment that way. Let me know if the
attached file does not show up.

By the way, we are working on a new application for the tech forums that
should support attached files.

Hope this helps,

Stan Wohlfarth
Product Coordinator/Editor
VW/Audi Service Manuals
Bentley Publishers
1734 Massachusetts Avenue
Cambridge, MA 02138 USA
www.bentleypublishers.com

-----Original Message-----
From: golf-jetta-93-00 Listmanager
[mailto:listmanager@tech.bentleypublishers.com]
Sent: Sunday, February 02, 2003 11:41 PM
Subject: Jetta ECM

A few questions: Recently my 96 jetta developed a starting problem (It
wouldn't). The dealer told me the ECM,Coil and Distributor had been ruined
by water which had leaked into the ignition coil.

Replacing the distributor and coil were no problem (thanks to your manual)
The ECM however was over $600.00! I found a used ECM which seems to work
fine, but likely needs the readiness codes reinstalled since the check
engine light is still on.

My question is that the origional ECM (Part # 037-906-259J) had a J on the
end. The replacement had no letter prefix. A copy of a 1996 VW "Service
Action" suggested replacing the ECM with a new unit with a prefix of X. Are
the ECMs all the same? I assume the prefix designates the manufacture date
or software rev?

To reply: mailto:golf-jetta-93-00.4648@tech.bentleypublishers.com
To start a new topic: mailto:golf-jetta-93-00@tech.bentleypublishers.com
To login: http://tech.bentleypublishers.com:80/~vw

(File attachment removed)

No nickname sel...

Posts: 1
Registered: 07/15/14
Re: RE: Jetta ECM
Posted: Jul 15, 2014 3:00 AM   in response to: wohlfarth in response to: wohlfarth
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