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Old 05-15-2016, 05:50 PM   #1
ajaybrooks1
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Join Date: Nov 2012
Chapter/Region: NWIC
Location: East Oregon
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2008 STi Hatch
Blue

Default 2008 STi Cruise Control Issue

So I was driving to work and went to use the cruise control, the green "cruise" light turned on like normal but it would not set.

I checked the fuses just to make sure and they were all good.

I did some research but just found older styles with issues and CEL's.

I do not have any CEL's on. But my hill assist light is on. It has been on for months now. The cruise control did work fine when that light was on.

I unplugged the battery, I even reset my ECU with the Accessport. Still doesn't work.

now I am lost.. any help?
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Old 05-15-2016, 06:23 PM   #2
424wrx
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08 wrx stg3 vf52
14 legacy, 11 fozzy

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check the brake light switch under the dash.
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Old 05-15-2016, 08:55 PM   #3
ajaybrooks1
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Quote:
Originally Posted by 424wrx View Post
check the brake light switch under the dash.

What do you mean? Like the fuse?
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Old 05-15-2016, 09:27 PM   #4
424wrx
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Quote:
Originally Posted by ajaybrooks1 View Post
What do you mean? Like the fuse?
no, the actual brake light switch. there are a few threads on this. it gets out of adjustment and makes the lights come on in the dash. i cant find the link. its just a thought. see if it is close enough to the pedal. i could be wrong. good luck
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Old 05-16-2016, 02:13 PM   #5
ajaybrooks1
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so the brake light has something to do with the cruise control not working?
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Old 05-16-2016, 03:02 PM   #6
424wrx
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Quote:
Originally Posted by ajaybrooks1 View Post
so the brake light has something to do with the cruise control not working?
http://forums.nasioc.com/forums/show....php?t=2387380
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Old 05-20-2016, 07:47 PM   #7
ajaybrooks1
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I first adjusted the switch, it didn't work. So I replaced it. Cruise still does not engage.
What next?
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Old 05-24-2016, 09:56 AM   #8
z
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Neutral Position Switch. (Top of transmission, PITA to get to)

Do you have a cable and RomRaider Logger that you can connect to confirm?
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Old 05-24-2016, 01:39 PM   #9
ajaybrooks1
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no, I need to go to the dealership to have them pull the codes. Unless the AccessPort can do it..

Why would neutral position switch have any affect on the Cruise Control or Hill Assist?
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Old 05-24-2016, 03:09 PM   #10
z
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CT-DE-FL rinse+repeat

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Because if you're driving along in 6th gear in cruise control, it's programmed to automatically deactivate cruise control if you accidentally bump your shifter into neutral.

The Neutral Position Switch tells the ecu if the trans is in gear or in N

With Tactrix Cable and RomRaider Logger, you can see the current output of your switches (among other things).

When the shifter is in Neutral, the NPS output = 1
When the shifter is in any gear, the NPS output = 0

* or that could be backwards, I would have to check later

Nonetheless, mine is messed up and I can see when i'm in a gear how it wobbles between 0/1

This is the reason my CC doesn't work, and a pretty good chance that's why yours won't activate too.
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