I have an 05 coupe - would anyone know why the ABS light comes on (DIC display ABS malfunction, then AH malfunction, then TC malfunction) whenever I hit 110-120 mph?

Although something I usually only encounter at the end of the strip, and that goes away when I turn off/and turn back on the car...it's still a cause for concern that the dealership can't obviously reproduce and one that I don't care to explain to them.

 

Are you running your stock Goodyears? If you are, I don't have any suggestions.

If you're running some different wheels/tires, especially something that changes the ratio of the front to rear wheel diameters, then that's almost certainly what is causing it.

Bob

 

Ah, didn't think of that but sadly, yes - stock Goodyear sizes on stock base model wheels

 

Can that be fixed by changing the sizes in hp tuners?

 

I am having a problom with my Engine Control and then the ABS/Traction Control coming on when the weather is/was below 65*.

They have replaced a wheel spd sensor and the ABS Control Module, guess what, still comes on.

If I had to guess, it's still a wheel spd snsr. And I would speculate yours is too.

 

This dealership seems to disregard any suggestions I have, so they have brought up the idea to connect a logging device to the car so that it will record what exactly is happening when the light comes on since they can't get it to replicate.

Are there any warranty implications to me since this only happens at 120mph? Or how about even telling them about it cause any headaches? Thanks for the input so far.

 

some dealers have the tattle tale tool some dont,look at the legal side 'they would be encourging you to go 100 mph plus' get a code reader ,even if it goes off after a run the ECM should have a history code IF ya dont turn the car off

 

Off hand I don't see any implications frpm this, unless they try to say abuse or racing. Is there any place you can open it up to 120 for them?

Also, the data logging isn't going to be long term, at best maybe 15 mins or when the light comes on depending on what they propose to use.

Have they scanned it for any ABS codes?

 

my scan tool has a flight recorder and will hold the data for decades

 

It may "HOLD IT" for decades, but how much TIME will it actually record.

Other than dedicated programs, most scanners designed for the automotive tech will not record hours of data as some may fear.

Here is how the Tech2 operates

Trigger Type (F0 - F3 function keys) determines how the snapshot is triggered:
F0: Manual Trigger triggers a snapshot when you press the Trigger soft key.
F1: Any Code triggers a snapshot whenever any current trouble code is stored. This event occurs
when the first code is stored in the vehicle controller memory.
F2: Single Code triggers a snapshot when a user specified trouble code is stored.
F3: Automatic Trigger (chassis applications only) automatically triggers a snapshot.
Trigger Point (F4 - F6 function keys) is the exact point at which the trouble code (fault) or manual
trigger occurs within the snapshot period. It helps to know the trigger point when you are looking for
changes in data parameters. Trigger point may be set for:
F4: Beginning causes the Tech 2 to start recording information from the trigger point until
snapshot storage is full. This choice is useful if the fault is predictable.
F5: Center is the most commonly used trigger point because it stores information leading up to
and following the trigger point. This function allows comparison of events before, during, and
after a fault.
F6: End sets the trigger point at the end of the snapshot recording and therefore shows only

 

It turned out to be a internal short in the EBCM. Luckily they found it before needing to data log.

They replaced the EBCM and it looks like the problem is fixed.

 

Any idea how they found it?

 

when its in flight recorder mode all data is kept in a 10 sec. delay. i have 10 secs. to arm the movie ,then it take 120 snap shots of the glitch.its a snap on mtg2500. i can disconnect from the car and dump the data to a home pc or review the movie on the scanner. it takes 20 pics before the event then 100 during. it can monitor any 6 data lines i want

 

I hope that never happens to me
Im glad they finally fixed it for you
Im glad Im not the only one whose had to go to the dealer a few times for the same thing
Ihad problems with the seals between the trans and rear
Mike

 

They didn't say - but the first few days they had it and "couldn't reproduce" the ABS light.....day 3 rolls around and the parts for the crank bolt TSB fix came in and magically figured it out.

My guess is he was just testing every sensor he could and finally ran some sort of test on the EBCM to test the internal circuits when finally finding the short.

I'm sure they probably have proprietary equipment to test it out.

 

Mine hasn't been acting up lately, but I am afraid it was going to come back. Was thinking about just replacing the ebcm..