[s-cars] Re: S-CAR-List Digest, Vol 18, Issue 93

[Evan Desjardins]

Calvin,

I will preface this by telling you that I'm completely ignorant about
the cruise control in our cars, but I will say that every other car
that I've ever had that has had a cruise control problem (3 and
counting) has always been vacuum.  There's been some leak somewhere in
the vacuum hoses preventing the cruise control from doing its job. 
Like I said, judging by the experience I've had with my $6, it's not
going to be simple or cheap to fix, or be done in a reasonable
timeframe, but hey...  it's something to check!

-Evan
'95 //S(till not starting consistently)6

> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 25 Apr 2005 21:00:11 -0600
> From: <calvinlc at earthlink.net>
> Subject: [s-cars] @#$% Cruise Control
> To: "Mark Strangways" <Strangconst at rogers.com>, "s-car list"
>         <s-car-list at audifans.com>
> Message-ID: <LPBBKNNJKBFLAOBBFLOMOEAFHFAA.calvinlc at earthlink.net>
> Content-Type: text/plain;       charset="iso-8859-1"
> 
> OK guys, I have followed the Bentley procedure to the letter to diagnose my
> cruise control issue.  Everything passes which indicates replace the
> controller.  I have tried 3 different controllers, none of which work
> consistently.  Once in a blue moon it will actually work.  Everything in the
> Bentley Procedure is bulletproof with the possible exception of two things.
> 
> 1) One step says to monitor voltage between pin 8 and pin 5 above 20 mph and
> make sure it is 12V.  I have 12V there all the time with the ignition on.
> Looking at the schematic I would expect 12V there all the time, it looks
> like it is coming straight from the fuse.
> 2) It doesn't really tell you much about checking the speedometer signal.  I
> see 2ms or so pulses coming down from 10V on this signal.  The signal never
> quite makes it to ground, only about 1V or so, does anyone know if this is
> normal?
> 
> I am at my wits end and I know at this point I know more than 90% of all
> mechanics about this problem so I don't think that's going to help me much.
> Please Help!  Thanks!
> 
> --Calvin