[urq] Cruise control

[Brandon Rogers]

So you're saying if the brake/clutch vent valves were not properly adjusted 
then the CC diaphragm would not stay compressed if I were to manually 
compress it?  Per Bentley I unhooked the vacuum line to the pump and 
compressed the diaphragm, and capped the open tube with my finger, the 
diaphragm did not expand back to normal.

Will the dual bulb holders (rear brake lights) affect anything here?  I did 
also add a ground strap for each side.

Thanks again

Brandon



----- Original Message ----- 
From: "Buchholz, Steven" <Steven.Buchholz at kla-tencor.com>
To: "Urq List" <urq at audifans.com>
Sent: Friday, July 08, 2005 11:06 AM
Subject: RE: [urq] Cruise control


... if the vacuum lines held vacuum as you indicated it isn't the vacuum
side of the pedal switch(es) which is at fault ... but it could be the
electrical switches ... I'd recommend that you focus on these.  Pull off
the electrical connector and measure the resistance with the pedal
released.  The resistance should be very close to zero ohms in this
state.  If you find a switch that is open, screw the switch in a turn or
two and test again.

Here's a link to a page in the KB:

http://www.audifans.com/twiki/bin/view/Audi/CruiseControl

This page has a link to a good troubleshooting page in Huw Powell's site
...

Steve B
San Jose, CA (USA)
>
> I did some trouble shooting on my CC last night (in preparation for
the long
> drive to UPG CT '05) and got it pretty narrowed down.  The ON, SET,
RES stalk
> switch is fine, vacuum pump fine, vac pump vent valve fine, no vac
leak.
>
> Here's where I'm not sure  - 1.)   first I wasn't sure which system in
Bentley
> to look at 1984 or 1985-1987.  According to the diagram it looked like
1984
> but the access to the CC module was per 1985-1987 - ie pull connector
through
> side of console versus take console apart.  I tested the above items
per both
> years and passed most of the tests.  Except Inductive Pickup ands vac
vent
> valves -  1984 spec was 400-800 ohms and 1985-1987 spec was 800-1200
ohms.  I
> set my DMM to "2K" and it read about ".600" so I'm hoping this is spec
for
> 1984 unit.
>
> 2.)  But I'm pretty sure its the vacuum vent valves.  Any good tips on
> adjusting these?

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