[s-cars] Afterrun relay? Thermoswitch..Rust in a trim?

[Ivan Demkovitch]

Lot's of information. Will answer in order :)

1. Yes, I did see fireworks. Park is 2 miles from my house and I had good 
view from my garage (j/k)
2. Yes, I will check those modules but it seems that pump and fan activated 
via different relays or this is some kind of special relay?(may be it's some 
kind of parallel circuits and one failing?) I will check schema and see. 
Anyway, I had problem with fan not running at all and I found corroded 
conector near resistor pack. Replaced wire and connector and fan works now. 
It spins freely and no clue that it's seizing.
3. Yes, I replaced radiator switch on a bottom and fan turns without boiling 
but temp gauge got me scared away from checking second speed operation. I 
tested terminals and there is 2 speeds.. I hope new switch does it's job. 
And you correct, it never hit's that temperature anyway. However, fan will 
run almast always when AC On.

4. I drove car for about 50 miles after cleared code and it didn't come 
back. Now I made more than 1k since then, probably need to check and see 
again. However situation improved after tune-up..

I still have something like road vibration. Car would drive perfectly smooth 
when cruising at 70-80 and it would have real short surges. It could be just 
road, but to me it feels like misfire. And it seem like it does not 
accelerate properly under half open throttle. It's like boost going in and 
out. Other people drove a car and didn't find anything wrong with it - so 
may be it's just me :)

Tom, do you know if servotronic operates the same on S6 and earlier S4? I 
connected mine back but don't see too much difference. When I drove your car 
it was much more noticeable.

Ivan

>From: Tom Green <trgreen at comcast.net>
>To: s-car-list at audifans.com, Ivan Demkovitch <idemkovitch at hotmail.com>
>Subject: Re:[s-cars] Afterrun relay? Thermoswitch..Rust in a trim?
>Date: Tue, 5 Jul 2005 01:22:39 -0400
>
>Ivan,
>I hope you have been out saluting the Stars and Stripes as well as  going 
>nuts over the
>afterrun system.  :-)
>
>Check pages X1105 for the afterrun circuit as Fuses, Engine cooling  
>system.  And X1098
>for the Aux Relay Panels 1 and 3.  It shows a fan relay in Aux panel  1 
>(J69) which is
>part 8D0 951 253 A, I believe.  And the J155 Turbo coolant pump  control 
>module is part #
>447 965 571 A in Aux relay panel 3 in passenger side kick panel.  I  know, 
>these pages are
>listed for the '96 Canadian S6, but I can't find any others.  The  afterrun 
>relay is in the passenger
>kick panel slot #5 and should have a part # to help identify.  That  is 
>most likely the faulty part
>but I don't know why the fan isn't running also.  This is a battery  killer 
>if this relay doesn't open
>after the 5 or 10 minute run time since the fan and pump will  continue to 
>run until power is exhausted.
>This circuit operates approx 5 minutes after shut down if the thermal  
>switch (F98) under the coolant pipe
>  reaches 106-112C.  Check this one by shorting the connector to make  pump 
>and fan run.  That 112C
>is difficult to reach as you indicate, but it shouldn't be the  coolant 
>boiling point.
>
>This Afterrun relay was also used in the 5000tq so it is a common part.
>
>The coolant fan control operates stage 1 on at 92-97C and off at  84-91C 
>and stage 2 on at 99-105C
>and off at 91-98C.  Perhaps there is some added resistance in the  circuit 
>from corrosion on connectors,
>etc. Make sure the fan turns freely and is not requiring excessive  current 
>to start.  It should operate well
>below the coolant boiling point with the engine running.  I believe  you 
>replaced this switch at the bottom
>of the radiator?
>
>I have assumed that this testing has been taking place without  
>airconditioning since a/c operation will
>cause the fan to run also.
>
>The trim clips start to rust under the trim after a while.  I don't  think 
>there is a cure except replacement.
>
>I didn't see any follow-up on your engine speed sensor failure.  Was  it a 
>sensor failure ?
>
>I would look at engine mounts and the bolts fastening the  transmission 
>flange to the engine for the
>source of your "kick".  Sounds like something is moving--apparently  your 
>thoughts since you looked
>at transmission mounts and driveline.
>
>Tom '95 S6
>
>
>>Date: Mon, 04 Jul 2005 10:16:54 -0500
>>From: "Ivan Demkovitch" <idemkovitch at hotmail.com>
>>Subject: [s-cars] Afterrun relay? Thermoswitch.. Rust in a trim?
>>To: s-car-list at audifans.com
>>Message-ID: <BAY104-F16D7F9AE65A515D8933897AEE70 at phx.gbl>
>>Content-Type: text/plain; format=flowed
>>
>>List,
>>
>>Have 3 small issues for now :)
>>
>>1. I just noticed yesterday that Afterrun pump stayed on forever.  It 
>>stayed
>>on without fan, but fan operates properly (i.e. afterrun system  works 
>>fine,
>>but this time pump never turned off). This make me think that also  they
>>should operate together - they turned on by separate relays and the  one 
>>that
>>connects pump sticking. Where is that relay located and where is  electric
>>schema in Bentley?
>>It's 93' S4 and I have 3 book Bentley. Found main cooling circuit,  but 
>>can't
>>find afterrun.
>>
>>2. May be not an issue at all.. I had coolant starting to boil over  
>>before
>>fan kick in (had to keep it at 4k RPM for minutes to test operation  (it
>>wouldn't overheat on a road). I replaced thermoswitch and this time  fan
>>started little sooner but still too late in my opinion. When in my  usual
>>driving temp stays at this thick bar or little lower on highway little
>>higher in traffics - this time it got up to almost next thinner bar  
>>before
>>fan turned on. But fan is 2 speed.. When second speed will be  turned on?
>>Do I have correctly operating cooling system?
>>
>>3. Moldings get rusty on the ends and start to pop off. Upper left  rear 
>>door
>>just snapped off yesterday. How do you fix them? What part # for  clips?
>>
>>TIA
>>Ivan
>