That's a good idea, because the junkyards have plenty of Jettas, and an ECU
goes for about 30 bucks. I've thought about this before, but I'm still too
skeptical to actually try it. It looks like the connector that plugs into
the ECU is the same, but some of the pins are different. That's why I dont
think it would work, because although SOME of the controls and sensors are
the same, they may not go through the same pins on the connector. And, some
of the sensors may have different resistances, which could send false
signals, or some may not even be there at all.  For example, I think the
jetta has 2 coolant temp sensors. The Jetta ECU would look for that second
sensor, and not find it, and that would cause problems. That is considering
the engine would even start, which I doubt it would. If pin #7 is not a
ground on the Jetta ECU, then there's your answer. I guess the only way to
know for sure is to try it. I'm too scared.
-Mark

>From: tmiller <tmiller@VCMAILS.COM>
>Reply-To: tmiller <tmiller@VCMAILS.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Actual Vanagon content!!
>Date: Sun, 25 Apr 2004 19:10:53 -0400
>
>Has anyone tried to use a Digifant ECU for the same year VW Golf or
>Jetta?  I was specifically curious about the use of an 89 1.8L Jetta ECU
>in an 89 Vanagon.  The controls are similar, the sensors are similar,
>has anyone tried this?
>TEMiller

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