Date:         Sat, 29 Nov 2008 21:27:17 -0800
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: OBD in a Vanagon?
In-Reply-To:  <416D609D33EA48A7A61CE2E26BDBCC8E@ZoltanPC>
Content-Type: text/plain; charset=ISO-8859-1

> I was wondering if anyone had thought of this thing yet.  We are spending an enormous amount of time to find faults on our old system.  The OBD supposed to find them for us.


Only problem is, the Vanagon Digifant is a very early iteration of the
product line and doesn't HAVE an On-Board Diagnostic system. Not a
single byte of non-volatile memory in there. Every time you turn the
ignition on and power up the ECU, it's as if it's powering up for the
first time. Its output is all done through lookup tables in ROM. It
has a "fault mode" for O2 sensor failure, but its general response to
bad input values is simply bad engine running. Later Digifant I's and
II's had basic "blinky light" fault codes, but not us. No, OUR
Digifant is basically the old L-JetTronic with ignition control and a
few other things added on.

--
John Bange
'90 Vanagon - "Lastwagen"
'90 Vanagon GL - "Wiesel"

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