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Old 02-13-2013, 01:24 PM   #1
Rally STi Guy
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Default Cruise control issue

So I have an 04 STi and the cruise control has been acting really funny and wanted to see if anyone else has had these problems
With the cruise set it will randomly drop. I haven't gone over a bump or anything that is consistent. It'll do it at all speeds.
I'll try to reset it or even resume it and it'll drop it again right away.
I've tried turning the cruise on and off and it'll still do it. I'm at a lose on why it is acting this way. It started doing it about 10,000 miles ago (car is now at 102k) and some times it would work and sometimes it wouldn't. Now it acts like that all the time. I hadn't changed anything on the car when it first started to happen.
I haven't started replacing parts yet. I think I would start with the stoplight switch or neutral safety switch.
Has anyone had these issues? Or have any recommendations.
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Last edited by Rally STi Guy; 02-13-2013 at 08:03 PM.
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Old 02-13-2013, 07:37 PM   #2
Speck863
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I also have an 04 STi with 102k on it. I had issues with the neutral safety switch when I bought it so I had it replaced. After that I could use cruise when the switch would actually allow it. But my switch is so finicky that I don't even bother with it. It's as if the car has to be in the right mood to allow use of cruise control.
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Old 02-13-2013, 07:59 PM   #3
Cocoa Beach Bum
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Quote:
Originally Posted by Rally STi Guy View Post
I have gone over a bump or anything that is consistent.
That explains everything.
Quote:
Originally Posted by Rally STi Guy View Post
I haven't started replacing parts yet. I think I would start with the stoplight switch or neutral safety switch.
Has anyone had these issues? Or have any recommendations.
I think you're on the right track. It sounds like a problem due to some flaky pedal position sensor that the cruise control checks to decide whether to disengage.
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Old 02-13-2013, 08:10 PM   #4
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[quote="Cocoa Beach Bum;39139719"]That explains everything. ]

Rally STi Guy
That was suppose to say "haven't", I has sense corrected it. Only reason why I mention that it was consistent when something else happens because I've read other threads that have said every I hit the a bump or my girl friends bag hit the center consoled it disengaged. So I wanted to point out that it was completely random and nothing else has been consistent to cause it to have that issue.
I really hope that its just a switch like that and note the cruise control module. A switch is cheap and easy to replace. I'll likely just replace the cheap one first and see what happens

Last edited by Rally STi Guy; 02-13-2013 at 08:16 PM.
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Old 02-13-2013, 08:32 PM   #5
Cefaln452
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if you have enough feedback knock it will bump the cruise off as well.
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Old 02-13-2013, 08:48 PM   #6
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This is a fairly common issue on high milage 5MTs. The bushing that the selector rod slides through in the extension housing gets some wear. This causes the neutral switch to intermittently give a false neutral indication, which kicks off the cruise.

The fast, cheap, and dirty trick was to replace the sealing washer under the neutral switch with a GM drain plug washer. It allowed the switch to seat deeper in, which kept more tension on the selector arm.

I haven't heard of this on the 6MT yet, but it's a possibility, and less expensive than swapping out parts. The dealer could verify the diagnosis by going for a drive with the dealership monitor connected. If the neutral switch status keeps changing while driving in gear, that's probably your issue.

"if you have enough feedback knock it will bump the cruise off as well."
No.
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Old 02-13-2013, 08:51 PM   #7
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Is there a way to monitor that switch with out having to go to the stealership I mean dealership. I'm sure the switch is less then what I would be charge by them
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Old 02-13-2013, 09:07 PM   #8
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Playing with my Access Port in the car is does have an option to monitor the clutch switch and the neutral switch but the neutral switch on it looks like it only reads when shifter is in neutral.
AutoZone has the clutch pedal switch for $23, neutral switch for $33 and the stop light for $38. No super expensive and all have a warranty on them too.
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Old 02-14-2013, 06:22 AM   #9
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Quote:
Originally Posted by Rally STi Guy View Post
Playing with my Access Port in the car is does have an option to monitor the clutch switch and the neutral switch but the neutral switch on it looks like it only reads when shifter is in neutral.
AutoZone has the clutch pedal switch for $23, neutral switch for $33 and the stop light for $38. No super expensive and all have a warranty on them too.
The neutral switch is SUPPOSED to read when in neutral, but the play in the shaft allows it to see neutral when in gear. That's the issue. It only takes a split second of false signal to kick out your cruise.

You can go ahead and spend $94 on parts and play parts swapper if you like, but you'll be bummed out if a $2 drain washer would fix the problem for you. I would suggest trying that first. But hey, it's your money.
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Old 02-14-2013, 09:14 AM   #10
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Quote:
Originally Posted by SpamBot View Post

The neutral switch is SUPPOSED to read when in neutral, but the play in the shaft allows it to see neutral when in gear. That's the issue. It only takes a split second of false signal to kick out your cruise.

You can go ahead and spend $94 on parts and play parts swapper if you like, but you'll be bummed out if a $2 drain washer would fix the problem for you. I would suggest trying that first. But hey, it's your money.
Could you elaborate more on how to do the drain plug washer fix. Is there a thread about it already? You had made it sound like that was only a 5 speed trick, so having a 6 speed I was out of luck. Who doesn't want to save money.
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Old 02-14-2013, 03:03 PM   #11
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Quote:
Originally Posted by Rally STi Guy View Post
Could you elaborate more on how to do the drain plug washer fix. Is there a thread about it already? You had made it sound like that was only a 5 speed trick, so having a 6 speed I was out of luck. Who doesn't want to save money.
1) Disconnect electrical connector from neutral switch.
2) Unscrew switch.
3) Remove sealing washer from switch.
4) Install drain plug washer on switch.
5) Screw switch back in. Snug to crush washer.
6) Reconnect electrical connector.

Didn't say your were out of luck with a 6 speed. Just said it was common on high mileage 5MTs. However, it sounds like it could be the same issue.
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Old 02-21-2013, 12:16 PM   #12
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We are talking about the switch under the dash on the brake pedal? Just wanted to confirm that.
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Old 02-21-2013, 12:51 PM   #13
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The neutral switch is located on the trans. You may be thinking about either the brake switch, or the clutch switch. Either of these will also kick out your cruise.
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Old 04-11-2013, 10:57 AM   #14
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My CC doesnt work either but i do have those white plastic things on all my pedals. They have little dents in them from the sensor and my gas pedal doesn't seem to have a sensor connected to it, but it seems like thats how they should be. Anyone know a direction i should start looking towards?
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Old 04-11-2013, 01:36 PM   #15
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I have been able to do anything with my issue yet but I'm going to be putting on a new turbo back in a week or so. When I do that I'm going to tilt down the transmission and replace the neutral switch while I'm there. If that doesn't fix it I'm going to mess with the switches on the pedals. From looking at the switches on the pedals it looks like they are adjustable a little bit. So before I replace those I'm going to try adjusting them to see if that fixes it.
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Old 04-11-2013, 01:43 PM   #16
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Alright keep us posted man
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Old 06-27-2013, 02:12 AM   #17
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Alright after having car taken apart of over a month while doing head gaskets and upgrading to head studs I was able to play around with this issue. While I had the engine out I also removed the transmission and cleaned it up real well. With it out I replaced the neutral safety switch, AutoZone was able to order one it for me. The one that can out did look worn down. With the car finally back together I drove it tonight and the cruise control worked like a champ. So the neutral safety looks to have been what was causing my issue. Now I just have to figure out why the car won't boost over 10PSI
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Old 07-10-2013, 11:01 PM   #18
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My cruise control would randomly drop out, too. It turned out to be one of the switches on the pedals. The switch wasn't bad, but it needed adjustment - the body of the switch can be moved toward or away from the pedal bracket. Over time, I think the pedals "droop" a little and might move away from the switch far enough to cause the circuit to open.
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Old 07-10-2013, 11:58 PM   #19
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Yeppp

Last edited by Lord Quas; 07-27-2013 at 11:13 AM.
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