Date:         Fri, 4 Feb 2005 10:34:56 -0600
Reply-To:     Tim Marciniak <tmarciniak@WI.RR.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Tim Marciniak <tmarciniak@WI.RR.COM>
Subject:      Idle Stabilizer 2nd check (regulator)
Content-Type: text/plain; charset=US-ASCII; format=flowed

I need some help trying to decipher the process of checking the idle
stabilizer with the directions given in the Bentley manual Section
24.53.

My first question is How do you connect an ammeter to the idle
stabilizer valve and am I connecting it into the correct circuit?  When
you unplug this connector from the idle stabilizer valve (ISV), you are
unplugging a yellow and a white wire that go from the idle stabilizer
control valve to the idle stabilizer control unit.  Now does it matter
if you connect the ammeter inline with the  yellow wire or the white
wire to the ISV.  Should the current be the same (spec value is 430ma
fluctuating), whether you connect inline through the yellow or white?
And of course once the ammeter is in the circuit you would connect the
other wire (be it the yellow or white) back onto itself with some sort
of jumper wire to complete the circuit with an ammeter in it.

Second question is they tell you to disconnect connector 2.  Now just
what am I disconnecting here and where is it?  The diagram on that page
has the number 2 pointing to a wire that is  above the thermostat
housing.  It does not give any clue like the color of the wire.  In
this second test I am assuming we are simulating some kind of open loop
scenario but exactly what variable are we removing from the system.  I
think this "connector 2" may be the wiring that goes from the G62
Coolant temp sensor to the Digifant Control Unit and the Idle
stabilization Control Unit---Can anyone verify this.  The wires are
gray in color with one gray wire going into the connector and 2 gray
wires leaving it.  There is another connector right next to this one
with 1 green wire going into the connector and 2 green leaving it--I
dont know what circuit these are in.

I am having problems maintaining an idle.  Van is a little hard to
start at time, it idles down and eventually stalls both when its cold
and warm, probably worse when its warmed up.

I have also found some ground wires and I am going to replace the
eyelets on these but before I go ahead and do this i would like to get
an ammeter reading to see if any changes I make improves the current
spec.

Tim

1990 Multivan