Date:         Thu, 9 Oct 2008 18:39:10 -0700
Reply-To:     David Kao <dtkao0205@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Kao <dtkao0205@YAHOO.COM>
Subject:      Re: Technical question re: Injector firing signal
Comments: To: "B.J.R." <beer_eighty@YAHOO.COM>
In-Reply-To:  <964371.3101.qm@web83608.mail.sp1.yahoo.com>
Content-Type: text/plain; charset=us-ascii

I would open the case of the ECU and check pin #1 from inside
provided that you have done checking from outside. If you have
a digital VOM you can measure AC voltage on pin #1 from inside.
Start from a higher range then switch to lower range until you
get a reading. You should see a few volts up to 10 or 15 volt.
If it is zero that apparently means trouble there. If you have
a scope it will be the best tool to see the signal.

Check all your ground strips. It could be a grounding issue.
If you can find an ECU to try it will tell if it is the culprit.
Or you can take your ECU to try it on another van.

David



--- On Thu, 10/9/08, B.J.R. <beer_eighty@YAHOO.COM> wrote:

> From: B.J.R. <beer_eighty@YAHOO.COM>
> Subject: Re: Technical question re: Injector firing signal
> To: vanagon@GERRY.VANAGON.COM
> Date: Thursday, October 9, 2008, 6:09 PM
> Here IS A diagram of the system
>
> http://s417.photobucket.com/albums/pp260/volksproblem/?action=view&current=PA040039.jp
>
>
> I have tested continuity in ecu wires pin #
> 1, 13, 15, 14, 32, 29, 33, 10,5, 16, 17, 20, 4,
> Ox sensor
> 4, 8, 6, 7,
> ignition control
> 2, 5, 6, 3, 1, 4
>
> All are acceptable range.
> gave all wires motion to check for loose or weak
> connections.
>
>
> HOW DO I CHECK FOR SIGNAL FROM IG COIL TO ECU #1 ???
>
>
>
>
> ----- Original Message ----
> From: Scott Daniel - Turbovans
> <scottdaniel@turbovans.com>
> To: B.J.R. <beer_eighty@YAHOO.COM>;
> vanagon@GERRY.VANAGON.COM
> Sent: Thursday, October 9, 2008 5:57:33 PM
> Subject: Re:      Re: Technical question re: Injector
> firing signal
>
> do you know how to check continuity with a volt-ohm meter ?
> essential to checking wiring harness continuity.
> the less expensive ones, analogue, start at under 5
> dollars- made in china
> of course.
> Digital volt-ohm meters, which are far more
> capable.......like for checking
> oxygen sensor output .......
> cost more of course.  Recently my 20 year old one died -
> Radio Shack's best
> one was 70 bucks I think.
> Scott