Welcome to the North American Subaru Impreza Owners Club Saturday April 18, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-19-2012, 12:07 PM   #1
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default DCCD "O" flashing, ABS light on (not working), brake light on, and speedo fluctuating

I know there are threads addressing similar issues, but this is a little different and unique, so I'm starting a new thread. If the mods feel this should go somewhere else, feel free to move/combine. Just hoping someone can help narrow this down.

I'm going to try and give as much info as possible, so please excuse the long read...

The car is strictly a track car, and the problem started this past weekend at the track. It the was fine all 4 sessions Saturday, and the first session on Sunday. The second session I went out and I noticed the DCCD light blinking, and the ABS light was on. The car was running fine so I stayed out, but didn't run too hard. After a couple laps, while braking into turn 1, one of the wheels locked up and jerked the car hard to the right. Seemed like it locked up WAY to easy. I was able to recover, but then my speedo started fluctuating like crazy. I went in after that. I have not not had any offs/spins in a very long time, so no sudden jerks of the wheel, or any excessive abuse (other than regular track duty). One other thing, someone on the grid noticed that my reverse lights were on when I went out for the above mentioned session.

Got the car up and looked at all the ABS sensors. They all seemed fine, but there's really no way to visually see if they're bad. I checked the codes with the AP, but got nothing. I reset the ECU, but the same lights on the dash come on. Got up under the car to check the sensors/connectors/wiring in the tranny/DCCD area, and nothing looks abnormal. We did find what looked like some sort of ground wire loose, but it seemed to just connect to another ground on the back of the manifold, on the turbo side. It's not hooked into any sort of electronics I could see. I'll try to get a pic of it soon. I don't think this is related. I checked all the fuses that seemed like they might have something to do with this, but they were all fine. I didn't check all the fuses, but this thread mentions the "rear" fuse being blown, and I have very similar symptoms. I'll check that fuse when I get home.

A little more background... I did just get the car aligned, new tranny oil put in, new rear diff oil put in, and the front control arm bushings replaced (the control arms had to come completely off). NOTHING was done with the steering rack, or any components in the steering, so I don't think it's a broken clock spring.

That said, I do have an aftermarket steering wheel and quick release, but this has been on the car for many years without issue (see this thread).

So...I guess I really need to check the fuses and go from there. Any other suggestions, things to try, and advice is welcome. From all the threads I've read, it seems like this could be a PITA to diagnose and repair. And it's especially hard for me because the car isn't street legal so I can't drive around testing.

And oh, here's a vid of what the dash looks like. This is sitting in the garage, but if I was moving the speedo would be fluctuating. Don't mind the airbag light, that's always on because I have aftermarket seats.

https://www.youtube.com/watch?v=oJWm...eature=mh_lolz
* Registered users of the site do not see these ads.
mav1c is offline   Reply With Quote
Old 03-19-2012, 04:19 PM   #2
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

Quote:
Originally Posted by mav1c View Post
Don't mind the airbag light, that's always on because I have aftermarket seats.
Knock-off Bride Gias with green Takata harnesses, right? Those score the most points in the concours judging.

But seriously, folks...

Quote:
Originally Posted by mav1c View Post
We did find what looked like some sort of ground wire loose, but it seemed to just connect to another ground on the back of the manifold, on the turbo side.
I was at the track (and riding in the car) with mav1c. The disconnected ground (I believe) doesn't look like it has been hooked to anything in a while. It's got a ring terminal on the end, and there aren't/weren't any missing fasteners within reach of it that the ring terminal could've been connected to. So, it might not be correct that that ground isn't connected to anything (I think it should be connected to the strut tower), but I think it's an unrelated thing. It was the only thing remotely out of order that we found, though, as we went over the car in the paddock.

Definitely curious to see what folks can come up with on this one.

Pat Olsen
Patrick Olsen is offline   Reply With Quote
Old 03-19-2012, 04:24 PM   #3
motohippy
Scooby Newbie
 
Member#: 225882
Join Date: Oct 2009
Location: Central NJ
Vehicle:
2000 OBS
'88 BMW K75S

Default

caveat: I know slightly less than nothing about what I'm talking about.
But that said, I'd have to wonder if your speed sensor is somehow screwed. Seems like that would have the potential to cascade into the DCCD and ABS systems. . .
But then, that should throw a code, right? Right???
Good luck. . .
motohippy is offline   Reply With Quote
Old 03-19-2012, 05:39 PM   #4
DCCDPro
Former Vendor
 
Member#: 227549
Join Date: Oct 2009
Location: Guelph, Ontario
Default

^^^It also sounds logical to me that your abs sensors may be alright, but the speed sensor is broken or disconnected.

Usually DCCD issues are related to abs sensors being broken but in this case it seems weird, and the dccd system flashing is probably just a symptom.
DCCDPro is offline   Reply With Quote
Old 03-20-2012, 10:44 AM   #5
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

I am taking the car to Mach V next week. They have the tool to read the DCCD codes, so hopefully that will identify the issue. I agree that it seems like the speed sensor is borked, and hopefully that's all it is. I still have to check the fuses, but won't be able to until this weekend.
mav1c is offline   Reply With Quote
Old 03-20-2012, 12:22 PM   #6
Turn in Concepts
NASIOC Vendor
 
Member#: 93646
Join Date: Aug 2005
Chapter/Region: MWSOC
Vehicle:
Many Track Records
Let us help you go fast!

Default

DCCD controller takes input from both ABS and VSS. If either of those are wonky then ABS will flip out and default to open mode.
Turn in Concepts is offline   Reply With Quote
Old 03-20-2012, 02:14 PM   #7
DiscoGsus
Scooby Specialist
 
Member#: 47646
Join Date: Nov 2003
Chapter/Region: MAIC
Location: NoVa
Vehicle:
0211 RallyWagon
DGM Sedan

Default

All the rear-diff sensors plugged all the way in?
DCCD module electrical connection could also be a culprit.
DiscoGsus is offline   Reply With Quote
Old 03-20-2012, 03:27 PM   #8
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

I'll check the connectors this weekend.
mav1c is offline   Reply With Quote
Old 03-20-2012, 10:43 PM   #9
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by Turn in Concepts View Post
DCCD controller takes input from both ABS and VSS. If either of those are wonky then ABS will flip out and default to open mode.
That makes sense with the DCCD and ABS issues, but why the fluctuating speedo?

Last edited by mav1c; 03-21-2012 at 09:07 AM.
mav1c is offline   Reply With Quote
Old 03-20-2012, 10:45 PM   #10
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by DiscoGsus View Post
All the rear-diff sensors plugged all the way in?
DCCD module electrical connection could also be a culprit.
Same here. I can see the DCCD and maybe the rear diff lights coming on, but the how would this cause the fluctuating speedo?

Last edited by mav1c; 03-21-2012 at 09:07 AM.
mav1c is offline   Reply With Quote
Old 03-20-2012, 11:13 PM   #11
Turn in Concepts
NASIOC Vendor
 
Member#: 93646
Join Date: Aug 2005
Chapter/Region: MWSOC
Vehicle:
Many Track Records
Let us help you go fast!

Default

Quote:
Originally Posted by mav1c View Post
That makes sense with the DCCD and ABS issues, but why the fluctuating speedo?



Same here. I can see the DCCD and maybe the rear diff lights coming on, but the how would this cause the fluctuating speedo?

if I had to venture a guess I would say to look at the harness above the turbo and make sure no wires have rubbed or had anything untoward happen to them.
Turn in Concepts is offline   Reply With Quote
Old 03-21-2012, 09:06 AM   #12
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by Turn in Concepts View Post
if I had to venture a guess I would say to look at the harness above the turbo and make sure no wires have rubbed or had anything untoward happen to them.
We looked all around the turbo. Nothing looked out of place, broken, burnt, or melted. I'll look again.
mav1c is offline   Reply With Quote
Old 03-21-2012, 10:57 AM   #13
Turn in Concepts
NASIOC Vendor
 
Member#: 93646
Join Date: Aug 2005
Chapter/Region: MWSOC
Vehicle:
Many Track Records
Let us help you go fast!

Default

Quote:
Originally Posted by mav1c View Post
We looked all around the turbo. Nothing looked out of place, broken, burnt, or melted. I'll look again.
k. check the VSS sender while you're at it. I've seen them go wonky when they get too hot.
Turn in Concepts is offline   Reply With Quote
Old 03-21-2012, 11:27 AM   #14
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by Turn in Concepts View Post
k. check the VSS sender while you're at it. I've seen them go wonky when they get too hot.
VSS sender? Where is this located?
mav1c is offline   Reply With Quote
Old 03-21-2012, 11:41 AM   #15
mattsti10
Scooby Newbie
 
Member#: 280598
Join Date: Apr 2011
Chapter/Region: MAIC
Location: MD
Vehicle:
05 STi
CGM

Default

REVERSE LIGHT FUSE, check it out, also check other fuses in the fuse box that is in driver area, report back. I had this same issue, it was REVERSE LIGHT FUSE
mattsti10 is offline   Reply With Quote
Old 03-21-2012, 11:50 AM   #16
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by mattsti10 View Post
REVERSE LIGHT FUSE, check it out, also check other fuses in the fuse box that is in driver area, report back. I had this same issue, it was REVERSE LIGHT FUSE
Really?! I'll check it out this weekend. I'll be shocked if that's all it is, but fingers crossed.
mav1c is offline   Reply With Quote
Old 03-21-2012, 01:51 PM   #17
Turn in Concepts
NASIOC Vendor
 
Member#: 93646
Join Date: Aug 2005
Chapter/Region: MWSOC
Vehicle:
Many Track Records
Let us help you go fast!

Default

Quote:
Originally Posted by mattsti10 View Post
REVERSE LIGHT FUSE, check it out, also check other fuses in the fuse box that is in driver area, report back. I had this same issue, it was REVERSE LIGHT FUSE
Quote:
Originally Posted by mav1c View Post
Really?! I'll check it out this weekend. I'll be shocked if that's all it is, but fingers crossed.
wow! really?! Please update the thread with your findings.
Turn in Concepts is offline   Reply With Quote
Old 03-21-2012, 04:30 PM   #18
Web Foot STi
Scooby Guru
 
Member#: 39086
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2004 STi
White

Default

Quote:
Originally Posted by mav1c View Post
Same here. I can see the DCCD and maybe the rear diff lights coming on, but the how would this cause the fluctuating speedo?
Your High Diff Temp warning light is on? Not sure myself how that would freak the speedo.

Quote:
Originally Posted by mav1c View Post
VSS sender? Where is this located?
Vehicle Speed Sensor. It's near the bellhousing in front of the right axle.

Not sure it is the problem. A few years ago I answered a post about something broken on the tranny. After going back and forth for a bit it turned out that he nailed his VSS. Not connected the speedo worked just fine with no DCCD issues. Take that for what you will. I didn't see the car in person, and no photos were posted.



Does the parking brake light go on and off as it should? How about the rear brake lights?

If this simple stuff, and fuses, do not catch what's wrong then you are right to take it to Mach V and have the trouble codes checked. Much easer to chase things that way.
Web Foot STi is offline   Reply With Quote
Old 03-21-2012, 09:01 PM   #19
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by Web Foot STi View Post
Your High Diff Temp warning light is on? Not sure myself how that would freak the speedo.



Vehicle Speed Sensor. It's near the bellhousing in front of the right axle.

Not sure it is the problem. A few years ago I answered a post about something broken on the tranny. After going back and forth for a bit it turned out that he nailed his VSS. Not connected the speedo worked just fine with no DCCD issues. Take that for what you will. I didn't see the car in person, and no photos were posted.



Does the parking brake light go on and off as it should? How about the rear brake lights?

If this simple stuff, and fuses, do not catch what's wrong then you are right to take it to Mach V and have the trouble codes checked. Much easer to chase things that way.
The rear diff warning is not on, and never came on. Not sure about the parking brake light. Will check it out.
mav1c is offline   Reply With Quote
Old 03-21-2012, 09:36 PM   #20
Web Foot STi
Scooby Guru
 
Member#: 39086
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2004 STi
White

Default

^ Just had a second thought about that guy with the DOA VSS. It was broken and the ECU's may have been able to ignore it. Using the ABS signals only for road speed. Yours maybe just acting up a bit and confusing the heck out of the cars' semi smart brains.

If you draw a blank at Mach V, the next time you can drive the car, try and unplug your VSS to see if things behave.
Web Foot STi is offline   Reply With Quote
Old 03-25-2012, 11:43 AM   #21
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Found a couple of things. The rear "back" fuse was popped. Also, the negative terminal on the batter was loose. I replaced the fuse and the "O" light went away as well as the ABS light. I can control the DCCD, changing it from auto to whatever setting, and back. The DCCD light is still on, but I don't recall if that does stay on all the time. Can someone check on a 2006 STI to see if the DCCD light is always on?
mav1c is offline   Reply With Quote
Old 03-25-2012, 01:05 PM   #22
Web Foot STi
Scooby Guru
 
Member#: 39086
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2004 STi
White

Default

Great!

DCCD is aways on with an '04
Web Foot STi is offline   Reply With Quote
Old 03-25-2012, 01:09 PM   #23
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Yeah. Searching around youtube confirmed the DCCD light is always on. I'm hoping the loose battery terminal was what cause the short. Something new I noticed is an odd smell. Almost like tranny oil or plastic burning. Going to have to look at that now.
mav1c is offline   Reply With Quote
Old 03-25-2012, 01:16 PM   #24
Web Foot STi
Scooby Guru
 
Member#: 39086
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2004 STi
White

Default

Best wishes. Race car's are not fun.
Web Foot STi is offline   Reply With Quote
Old 03-25-2012, 01:22 PM   #25
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by Web Foot STi View Post
Best wishes. Race car's are not fun.
Race cars are fun. Troubleshooting problems with race cars, not so much.
mav1c is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
o5 sti dccd problem w/ abs, ebrake, dccd and speedo krambte79 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 28 03-19-2012 09:57 AM
Flashing DCCD ABS and Brake Light Help SubieSpence Transmission (AT/MT) & Driveline 5 11-11-2011 06:43 PM
tail light drl works, but brake light wont. HELP dakota g Electrical & Lighting 2 03-21-2011 03:46 AM
ABS, Brake light, no speedo???? Phil4631 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 11-07-2010 01:10 PM
WTB: 04-05 fog light kit/ 02-03 thrid brake light cover MaxedOutRS2.5 Private 'Wanted' Classifieds 3 06-03-2005 10:27 PM


All times are GMT -4. The time now is 04:19 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.