IML: Auto Temp II Service Diagnostic Tool

[Kenyon Wills <imperialist1960@xxxxxxxxx>]

I recently purchased the ATCII Diagnostic Tool
referenced in the FSM.  I have not dealt with my Auto
temp II due to the mild climate here, but plan to
master this system now that I have 3 cars with it.

If you want to "rent" the tool for a fraction of the
$250 that I spent for it, please write to me off-list.

It's a small plastic box with some wires and stuff.  I
have not bothered to look in the FSM where the
instructions on its use are supposedly to be found.

-Kenyon




--- Tim Durrer <tdkd99@xxxxxxxxx> wrote:

> Hi Jim,
> 
> I also have a '73 LeBaron that I am in the middle of
> repairing various things on. One of which is the
> Auto
> Temp II. I have ordered a replacement servo from
> Performance Analysis in Oakridge TN. They are
> expensive, but well worth the cost. If yours still
> has
> the old plastic design unit under the hood it will
> eventually crack and leak coolant (If it is not
> already cracked). When I got my car the previous
> owner
> had bypassed the unit for this reason.
> 
> As to your switch issue I am a little confused. You
> said you remember a bundle of vacuum lines that
> seemed
> to go nowhere. Were they capped off by any chance?
> It
> would seem to me you would hear a distinctive hiss
> coming from under the dash the last time you drove
> the
> car if they were not. Are you sure the actuator
> itself
> does not have the bracket the switch is mounted to?
> It
> could be they just installed the wrong actuator and
> said the heck with switch when it would not bolt up.
> 
> I don't have a parts book to verify the difference
> on
> ATC versus non ATC parts. Is the actuator connected
> by
> any chance? 
> 
> My car is currently at my Dad's in a different part
> of
> the state having some engine work done to it. I
> should
> be able to pick it up in a couple of weeks and I
> will
> check mine to see how it is set up. I currently have
> the glove box out, so I should be able to see the
> switch and how it mounts easily. I will let you know
> what I find out. Where did you get your switch from?
> I
> may need one myself!
> 
> Tim Durrer
> 73 LeBaron Blue Sky
> --- Jim Stacey <jhrstacey@xxxxxxxxxxxx> wrote:
> 
> > We've all heard that old saying "Never buy a car
> > made on a Monday or a
> > Friday".  Well, I've come to believe there just
> may
> > be some truth to that.
> > The fender tag on my '73 Lebaron indicates it was
> > built on Sept 18 1972 - a
> > Monday.  I just discovered that one of the parts
> > installed at the factory
> > for the AutoTemp II system is not the correct part
> > at all, but rather
> > belongs to the non-AutoTemp version of the
> > heating/air conditioning system.
> > 
> >  
> > 
> > My car is totally dismantled at the moment for a
> > very slow do-it-yourself
> > ground up restoration, and it has been over 20
> years
> > since I drove it, but I
> > remember that when I was driving the car many
> years
> > ago, the air
> > conditioning was never as cold as it should have
> > been and I think I now know
> > why.  I also remember that when I took the dash
> > apart and stored all the
> > bits and pieces in boxes that there was a bundle
> of
> > vacuum hoses that just
> > went "nowhere".  I thought that was strange at the
> > time.  I since determined
> > from the parts book, FSM and '71 Master
> Technician's
> > Service Conference on
> > A/T II that this bundle of hoses was supposed to
> go
> > to a "vacuum transfer
> > switch" that controls the fresh air/recirculation
> > door.  I figured maybe
> > somehow that little switch got missed as my car
> made
> > its way down the
> > assembly line.  After all, it was a Monday!  To my
> > delight, I was able to
> > order an NOS transfer switch and thought my
> troubles
> > were over.
> > 
> >  
> > 
> > However, now that I have the vacuum switch, I have
> > determined that I also
> > have the wrong fresh air/recirculating door
> > assembly. It looks like I have
> > the air door for standard A/C and not AutoTemp II.
> 
> > (Actually there seem to
> > be a few different names for this part.  The parts
> > book calls it the "Air
> > recirculating housing" PN 3620732.  The FSM "air
> > door housing" and the MTSC
> > calls it the "air inlet door".  I'll just call it
> > the "air door" for
> > simplicity.)  Anyway, the air door for AutoTemp II
> > should have a cam
> > attached to it to move the spool valve of the
> > transfer switch through its
> > travel as the door moves from zero to 100% outside
> > air.  And the bracket
> > that holds the vacuum pot (actuator) that moves
> the
> > door should have a place
> > to mount the transfer switch. Mine has neither!  A
> > bad day at the factory
> > indeed!
> > 
> >  
> > 
> > So now I am looking for a '71 thro' 73 air door
> > housing for AutoTemp II
> > (with cam and bracket for the transfer switch). 
> > There is good news and bad
> > news regarding this air door housing assembly. 
> The
> > good news is that this
> > part is easily removed "once you get to it".  The
> > bad news is that there is
> > quite a bit involved in "getting to it".   It is
> > located directly behind the
> > heater blower motor and is accessed from the
> engine
> > compartment side of the
> > firewall.  There are just four screws holding it
> in
> > the firewall, but you
> > have to remove the blower motor and the large
> > plastic air plenum/housing on
> > the firewall first.  Just removing the blower
> motor
> > is a challenge because
> > it is pretty much buried in behind the right front
> > fender.  The FSM says you
> > can remove the blower motor by removing the
> plastic
> > wheelhouse inner fender
> > shields and going at it from "underneath", but I
> > have a feeling it would be
> > a lot easier with the fender completely off!
> > 
> >  
> > 
> > If anyone out there on the List has a '71 - '73
> > parts car with AutoTemp II
> > in such a state of "tear-down" that they could get
> > at the air door housing
> > rather easily, and would like to sell it, I would
> be
> > very interested in
> > hearing from you off list.
> > 
> >  
> > 
> > Jim Stacey
> > 
> > Ontario, Canada  
> > 
> >  
> > 
> >  
> > 
> > 
> 
> 
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=== message truncated ===


Kenyon Wills
 
 





















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