Date:         Wed, 12 Nov 2003 13:49:54 -0500
Reply-To:     David Brodbeck <gull@GULL.US>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Brodbeck <gull@GULL.US>
Subject:      Re: can a locked fuel pump kill an ECU?
Comments: To: Austin <austins@IX.NETCOM.COM>
In-Reply-To:  <6.0.0.22.2.20031111223115.0249b940@popd.ix.netcom.com>
Content-Type: text/plain; charset="iso-8859-1"

On Wednesday 12 November 2003 01:52 am, Austin wrote:
> Is it possible that the locked pump burned out a
> transistor or something else in the ECU that should be switching voltage to
> the pump?

I doubt it because there's no direct connection betwee the ECU and the pump.
I dug out my Bentley and looked at the wiring diagram, and the ECU controls a
relay, which then switches power to the pump.  If you have a Bentley, the
diagram I"m looking at is on page 97.106, current track 31.

I would check the fuel pump relay.  See if it's getting power to its coil,
and if so whether the contacts are passing 12v to the pump wiring.  It's
possible the bad pump burned out the relay contacts.  I don't see a fuse for
this circuit in the diagram; relay power seems to come directly from the
battery via the alternator terminal.