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Old 06-12-2013, 07:19 PM   #1
DarthAWM
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TCS No Comm.

Ok, I get the Corvette out tonight and the traction control and ABS lights come on and the DIC says Service Automobile Soon. I get home and pull the codes, there is a laundry list of them but the one that concerns me the most is TCS- No Comm.

What are some quick, obvious checks for this? Connectors? Fuses? Circuit Breakers? Relay?
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Old 06-12-2013, 08:29 PM   #2
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Sorry to hear about your woes.

Were any of the codes wheel speed sensor or yaw sensor codes?
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Old 06-12-2013, 08:36 PM   #3
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Also after you recorded the codes and cleared them, which ones came back directly?
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Old 06-13-2013, 01:48 AM   #4
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Quote:
Originally Posted by DarthAWM View Post
Ok, I get the Corvette out tonight and the traction control and ABS lights come on and the DIC says Service Automobile Soon. I get home and pull the codes, there is a laundry list of them but the one that concerns me the most is TCS- No Comm.

What are some quick, obvious checks for this? Connectors? Fuses? Circuit Breakers? Relay?
You're in luck with the year of your car. Give ABSFixer a call and explain your situation to him. He will direct you on what you should do.
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Old 06-19-2013, 07:49 PM   #5
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UPDATE- Apparently the TCS computer got over its temper tantrum and started talking to the rest of the computers. As I was coming to a stop at a bumpy intersection I felt the brake pedal pulse, and looked down to notice the ABS and traction control lights were out. Pulled the codes when I got home, TSC-No codes. How did I fix it, I don't know but for the moment it aint broke
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Old 06-19-2013, 08:59 PM   #6
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Did you ever bother to check the connections to the computer? If bumps are fixing the issue, it will be back.
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Old 06-20-2013, 07:06 PM   #7
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Quote:
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Did you ever bother to check the connections to the computer? If bumps are fixing the issue, it will be back.
I checked where it connects to the ebcm, everything seemed tight and secure.

Again, I don't think its fixed, its just working right now.
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Old 06-24-2013, 07:39 PM   #8
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Ok the TCS recovery is temperature related. When cold no communication, as the car heats up(over 1-2 hours of driving) ABS comes back then traction control/active handling.

Thoughts?
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Old 06-24-2013, 09:18 PM   #9
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Quote:
Originally Posted by DarthAWM View Post
Ok the TCS recovery is temperature related. When cold no communication, as the car heats up(over 1-2 hours of driving) ABS comes back then traction control/active handling.

Thoughts?
Check all the connections are clean and run the wiring closely every where you can see it. Also check the wheel sensors and the yaw sensors.

I read some where awhile back that a malfunction could shut down all communication, but it was one specific malfunction that was doing it. Can't remember. You --> <-- me. Sorry.

But also...like I tell everybody when dealing with electrical issues....remove and insure connectors are clean and apply die electric ($3 at auto store) grease before reconnecting. Pay close attention to the connection at the ABS motor.

Also since it is happening mostly when its cold and comes back to life when its hot you might think about moving to TX. Just kidding , but maybe do a search to see if there is a board that can be heated with a soldering gun. The cold solders in our cars are a PITA.

I will see what else I can find online tomorrow when I am idle for a moment.

Hopefully Junk will have more info too.


(Just realized you were in Odesa!!!) You already are in TX!
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Old 06-24-2013, 10:13 PM   #10
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I'm saying that it is something simple like the connector to the ECBM. You say that you checked it, I'm saying that you didn't check it well enough or in your case, while the car was cold. There's supposed to be a device that holds that connector in place (sorta like a zip tie but called a quality assurance connector or something like that). Is yours still on that connector?
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Old 06-25-2013, 07:56 AM   #11
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Also too....when you look at the connectors, try to check the electrical prong inside the connector where it actually pushes against the prong. You will know what I am talking about when you are looking at them. They will sometimes get weak and will need to be bent back toward where the prong makes contact in the connector. You will see that it will just "LOOK" like it is opened up too much. It will probably stand out from the rest.

And my guess would be that its in the prongs that connect to the ABS motor or ECBM.

Electrical issues are always a pain to trace down, just don't get frustrated and take your time. You will eventually find the problem spot.

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Old 06-25-2013, 11:39 PM   #12
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I just fixed my issue with this today.

If you pull your codes you will probably show C1214 on your TCS codes.

The first step is to clean your grounds on the frame in the engine bay, both are bolted to the frame behind your lights. Disassemble them, clean them out, and put dielectric grease in the connectors for good measure. I took a steel brush and sandpaper to the bolt s on the frame to get the black crap off it to make a good ground and put it back together.

Check to see if this fixes it - if not, move on to the next step.

Pull your EBCM out and check the solder points on it. They are probably cold solder joints, cracked, and not working properly. It is an intermittent problem at first, usually, and it will get worse and worse until it is total screwed. I pulled my EBCM apart and took a soldering iron and some solder to it and resoldered the relay connections and threw it back in - good as new, no more codes or TCS/ABS/active handling issues.

A guide on how to remove and service the EBCM can be found here:

http://forums.corvetteforum.com/c5-t...tion-long.html

It took me a couple of hours to do all this, and it saved me a lot of money. No need to send it to ABSFixer.
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Old 06-26-2013, 06:32 AM   #13
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That's great and all, but you don't say exactly what cold solder joints to solder. There must be a million discrete components that you can flow solder on in that thing. Do you have any pictures of these cold solder joints?
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Old 06-26-2013, 11:53 AM   #14
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I should have been more detailed. I also posted the wrong link! They are the solder joints for the relay that connects to the board. There are 5 points. Here is mine:



Edit: Again, sorry. Here are the proper links.

For cleaning engine bay grounds (do this first):
http://forums.corvetteforum.com/c5-t...tion-long.html

For removing and repairing the EBCM.
http://forums.corvetteforum.com/c5-t...r-fleabay.html
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Old 06-26-2013, 12:36 PM   #15
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It also wouldn't hurt to give all the rest a little tap with a hot iron while your in there.

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