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View Full Version : Cruise Control works for 1-2 seconds then cuts out



pbcrazy
03-06-2017, 06:13 AM
I'm aware this is a common problem, but I haven't uncovered much with my certain issues.

So I just replaced the cruise control stalk as I diagnosed that to be atleast one of the issues, it didn't fix it so I took the module and re flowed most of the solder points and added some extra where it appeared cracked. Now it works, for all of a second. I can kinda feel the throttle move, and my afr gauge shows the throttle is pressed, but then it quits.

I did a simple vacuum check on the hose and throttle airbag pump thing and didn't find anything obvious. The car doesn't start without the clutch engaged, and the brake lights work so I don't think either of those are at fault. I've heard of people cleaning those switches before? Can you clean the throttle switch? Any ideas are much appreciated, I have a 1,000 mile drive coming up that my calves can't handle without cruise control

elduderino200
03-06-2017, 09:46 AM
by "throttle airbag pump thing" do you mean this guy: https://www.upload.ee/image/1376387/VacServo.02__1_.jpg

pbcrazy
03-06-2017, 11:02 AM
Yep lol, I think it's technical name is the actuator

pbcrazy
03-06-2017, 05:00 PM
I just went through these steps:

http://www.audiworld.com/forums/a4-b5-platform-discussion-1/heres-how-fix-your-cruise-control-255645/

And found that the cruise control module is not receiving enough power (.1V with ignition/cruise on, 0V when depressing clutch/brake pedal). All fuses look good and I sanded their contacts. The cruise control stalk is new and all other tests pass on it. So anybody have any idea why it's not receiving power?

Seerlah
03-09-2017, 06:49 AM
Check related relays.