Date: Wed, 16 Apr 2008 14:14:21 -0700
Reply-To: neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: neil N <musomuso@GMAIL.COM>
Subject: Re: Jetta Power Supply relay questions (Vanagon conversion) PIC
of wiring diagram.
In-Reply-To: <077601c89fff$6b67c9e0$6401a8c0@DJZL7KF1>
Content-Type: text/plain; charset=ISO-8859-1
Hi Scott.
On Wed, Apr 16, 2008 at 1:21 PM, Scott Daniel - Shazam
<scottdaniel@turbovans.com> wrote:
> Here's what I'm wondering.
> Is the fuel pump energized by the ECU supplying ground to it, to energize it
> ? ( like waterboxer vanagons have, and like subaru's have ) .
Yes. The ECU supplies grounds to fuel pump relay as well as other relays.
> If so, temporarily supply your own ground to make the fuel pump run,
> Then see if the engine starts.
>
> OR....just hot wire the fuel pump temporarily and see if the engine then
> runs.
> But as long as the ECU is supplying ground to energize the fp relay, the
> other contacts sure should not be hard to figure out or get right.
I hot wired the FP relay yesterday. I heard it run continuously, and
could hear fuel coming up through lines to fuel rail.
This makes me wonder if FP is running during cranking cycle.
> '3/86' and the '2' don't make sense to me.
> The J16 relay looks like a regular 4 contact relay to me, with nothing
> mysterious about it.
> Are you resisting moving to the next step ?
Yup! Regular "B flat" (very common key in music) relay, except that it
appears 30 is wired internally to provide + to one side of
electromagnet coil. Pretty sure only 3 connections needed.
Nope! :^)
Today, I'll be hot wiring FP while cranking to see if that's the issue.
I'll also be making up a push button (temp "on") for starter, so that
will help a lot with trouble shooting.
Thanks very much!
Neil.
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> neil N
> Sent: Wednesday, April 16, 2008 12:51 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Jetta Power Supply relay questions (Vanagon conversion) PIC of
> wiring diagram.
>
> Hi all.
>
> I still have a no start on my conversion, so am double checking the
> wiring to added relays for Jetta ABA OBD1 into my Vanagon.
>
> In this image from Bentley (Jetta):
>
> http://tubaneil.googlepages.com/jettafinal1.jpg/jettafinal1-full;init:.jpg
>
> there are two connections " 3/86 " and " 2 " near relay, that I'm curious
> about.
>
> 2 appears to connect with "malfunction" light on dash.
>
> + from ignition switch (15) goes to 3/86, but 86A is negative from
> ECU. There is only an 86 on relay.
>
> I would think that they don't shard the connection!
>
> And..... it appears that 30 is supplying + to 85 of relay internally,
> so why would there be a need for "keyed" + to relay?? Relay should be
> "turned on" by negative from ECU.
>
> I'm confused.
>
> I guess the simple question is, as per the diagram, do 3/86 and 2
> actually connect to the relay?
>
> Thanks for any help!
>
> Neil.
>