Not sure that happened tonight but while driving about 20MPH I heard the car turn off the active handling. I turned it back on but a minute later it did it again. It continued to do that off and on all night.
I've been looking for answers since I got home but they seem to be all over the place. The car runs no differently if it's on or off,,, runs as if nothing is wrong at all but the light comes on and off and sometimes not all the time the switch doesn't work sometimes it does. I've seen no codes just that the AT was either on, off or in competition mode and would switch back and forth on it's own. But again the car was running normally.

I had some issues with the grounds last year and got most of them cleaned and replaced....
Please any ideas what could be going on here?

 

You need to check your codes. One of the components of the active handling is starting to fail and tripping the system.

Its not possible to guess which part but if you post up the codes we can offer advice. In my case (and I have similar issues) its the SWPS.

 

Hold the #4 options button on the DIC and press #1 four times within 10 seconds. It will then rifle thru all the codes your car is putting out. That or bring it in to get scanned. You have to be careful with the Active handling because is has been known to cause wrecks if it malfunctions(at least from what i've read)

 

Thanks I'll get on it later today.... I need this like a whole in the head. GRRRRRRRRRR

 

When you say that you got your grounds cleaned or replaced, who did the work? I hope that it wasn't a GM dealer. I wouldn't even trust them with an oil change.
Sounds like a ground issue to me. But, the codes will help determine the problem.

 

I got the codes and there appears to be a lot of them. Can someone point in a directions of what codes we would be looking for to help with this issues so that I don't waste anyones time with non-related codes?
Thank you.

 

ok I found it..... 28-TCS C1255-H
One thing I saw said to check the connections and grounds. Does that seem to make any sense?
Thank You.

 

What do you mean by this?

"the switch doesn't work sometimes it does."

Could this be as simple as the pushbutton switch shorting out and turning it on and off by itself. The 1225 code should be a seperate issue from your TC switch not working all the time.

 

Well sometimes the switch will turn it back on sometimes it wont. When it first happened I thought some how I had bumped it and turned it off (not that I had ever done that) so when I heard it turn itself off I just pushed the button and it turned it back on. However the next time ( about 2 mins later) it happened the button didn't respond. I shut the car off came back 30mins later and everything seemed fine then it did it again and would switch on and off on it's own. Sometimes the switch would work and correct this sometimes not. I was told to look for a code and thats where I came up with that from.
Last night on my way home it drove fine for about 30mins and then started up again just before i was about to park it.

 

Wow...I take it this hasn't happened very often.

 

I'm afraid thats not one of the normal ones

Not sure if this is one of the faults that absfixer.com can fix. Worth checking with them.

Here's the procedure:

DTC C1255 or C1256
Circuit Description

This DTC identifies a malfunction within the electronic brake control module (EBCM).
Conditions for Running the DTC

The ABS conditions and the braking conditions are normal.
Conditions for Setting the DTC

An internal EBCM malfunction exists.
Action Taken When the DTC Sets
C1255

If equipped, the following actions occur:

The EBCM disables the DRP/ABS/TCS/VSES for the duration of the ignition cycle.
The ABS indicator turns ON.
The Traction Control and Active Handling indicator turns ON.
The red Brake warning indicator turns ON.
The DIC displays the following messages:
Service ABS
Service Traction System
Service Active Handling
The EBCM will also set DTC C1248.
For some DTC C1255xx, the EBCM disables the variable effort steering (VES) for the duration of the ignition cycle.

C1256
The ABS remains functional.
The ABS indicator remains OFF.

Conditions for Clearing the DTC

The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

The scan tool displays 2 additional characters after the DTC. Take note of the 2 character code and any other DTCs that are set. The 2 character code is an engineering aid used in order to determine the cause of the internal malfunction.
When the scan tool displays DTC C1255m3, the EBCM has not been programmed. Perform the setup procedure for the EBCM.

Test Description

The number below refers to the step number on the diagnostic table.

Determines whether the DTC is current.

 

Thank you.... This is turning into a pain in the butt.

 

Often a sign of a low battery. Always worth a check. Also, it's pretty easy to disconnect the button in the center console. If the problem stops, then you know it's a faulty button.

 

Thanks I had heard about looking at the battery as well. I'm going to try and take a look this weekend. It was just so strange the way the thing just kept doing it however it would stop for a bit. That kind of says to me that there's something loose or a short because it's not consistent. I can go start it up now and it'll be fine but it seems of course driving it makes it act up. Can't tell if it's hitting a bump or turning the wheel.

Anyone else have any ideas I'm all ears!

 

I've not heard of this one on the Vette but for what its worth I found this online. It refers to a Cadillac EBCM but its worth checking before sending the EBCM off to absfixer.com

However, EBTCM replacement is NOT always necessary when DTC C1255 is set. Here is a list of exceptions where a fault external to the EBTCM will set C1255.

C1255 E2: This Sub Code may set due to a loss of battery or ground to the EBTCM.

Battery Cable disconnect
EBTCM Fuse Pull
EBTCM harness disconnect
Weak or Discharged battery
Any other interruption of battery or ground to the EBTCM

 

Thank you so much I had some personal issues that needed to be addressed so I didn't get to work on the car all week but I'm going to get back on this and all the information I can get will help a great deal.
As stated this doesn't seem all that common so it's been hard to pin down. I haven't driven the car very much. Sat up most of the winter and even now with it getting warmer it hasn't been out much so I'll work on the battery part of this first.

 

OK.....very strange. I've been kind of busy the last few weeks so I didn't really get into working on the car the way I planned. However I've used it the last 4 days and no sign of the issues I was having ... hmmmmm! Strange it's like it reset itself or something.