Ran codes. It was B0040 right front wheel speed sensor circuit history. I replaced the wheel bearing assembly with the built in sensor today and I am throwing the same code still at 60mph! So now it's down to the wiring harness?

Has anyone chased the harness down? Where does it go? Any suggestions?

 

http://forums.corvetteforum.com/c6-t...need-help.html

 

Thanks a lot. I'll research this. I don't have a voltage meter tho... My electronics skills aren't too great. A test light is about the extent of my electo-skills... might have to go to the dealer

 

That won't happen with the sensors on a Vette. They are sealed inside the bearing. When you replace the bearing you replace the sensors.

Bill

 

Yeah I replaced the front right just to be sure. But it's still throwing the code

 

To read the DTCs for the EBTCM,, read them when the problem HAPPENS. If you turn OFF the ignition, you clear the DTCs and the EBTCM has to go thru it circuit checks and warm up before it looks for and post the DTCs. If your DTCs only happen during dynamic driving events, read them AFTER it happens and before you turn the IGNITION OFF

I posted this in one of your other post for the same issue:

Ok boys,,, I will add some stuff that I figured out for the C5s. Its pretty much the same for the C6.

The Wheel Hub speed sensors are pretty much bullet proof. There NOT very complicated when you take them apart.. These are C5 units but the C6s are not that much different and work the exact same way:











Its just a coil of wire around a plastic spool a small circuit board to connect the coil to the harness and the harness/plug assy.

Another fact that you need to know, the sensor output is an AC signal. Its a pulsed DC but the AC setting reads it better.

All the years that I have been dealing with wheel speed sensor issues (since 97) I have NEVER seen ANY wheel speed sensors FAIL.


What does fail and they fail a LOT are the crappy female pins inside the connectors on the main wheel speed sensor harness connector on the frame and the female plug in the sensor jumper harness



Heres an example of a NEW Female connector vs a BAD used female connector. The one on the RIGHT is BAD!!!!:



If you use a metal pick, you can reshape the little metal tung and make the proper connection. You can also purchase a new female connector pigtail. DO NOT get if from the stealership. There $26 each!!! Ask me how I know! Get them from the local parts store or Gene Culley www.gmpartshouse.com for a whole lot less!!








For easy troubleshooting,, you can read the wheel sensor resistances and voltages (when you rotate the wheel right from the EBTCM main connector:

2001+ shown



Long Story made short, there are TWO female connectors on EACH front wheel and ONE on each rear wheel harness connector that need to be checked for proper female pin grip. If the female pin is all spread open,, it is most likely part of the problem. I use an old MALE pin to check for proper female pin grip/connection.



If you slide the male pin into the female pin, there should be a nice tight fit and it should take a little effort to extract it and insert it.

Yea,,,,, I know what that sounds like!

Hope this helps!

BC

 

Thanks for the info

 

Thanks Bill! I checked both front connections and everything looks good and clean. It was previously throwing the lights at 60-70mph. I drove to the dealer this morning and couldn't get it to throw a code. On my way home I hit 90 and TC/ABS/AH all went off.

 

It has to be a difference in speed readings of 12mph or greater 3 times in a 200 millisecond sample. Below those speeds you are probably falling just inside that error range.

I don't think your dealer will go for a ride that fast to monitor the signals at that time.

Be sure to do a wire wiggle test when performing your continuity testing, and inspect your connections very carefully.

DJ

 

Yeah I'm starting to think its my tire size difference. I mean that's a long shot. But I can't make any lights come on until 65ish. Maybe that's when it falls into the parameters you just mentioned

 

Your tire sizes shouldn't throw a light, (Your diameter difference is the same as mine) but if you know someone with a slightly smaller front tire diameter that could let you try it out. That wouldn't be a bad test.

DJ

 

Unfortunately I don't have any friends with corvettes. According to bfg. My front tires are 26" and rear 27". So I think your right about the difference.

 

Stock sizes are 25.7" front, 26.9" rear. That sounds fine, although it's really not the height differences, it's the circumference difference that matters- the percent difference must be kept constant. Stock is 813F, 775R. Mine are 823F, 792R. Mine are about 1% off- 96.23 vs. 95.33.

Stock Z06 sizes are 816F, 783R, comes out to 95.96. So there is definitely no problem running tires that are 0.7% less revolutions per mile, but if yours are significantly less or more, you might have an issue.

 

My rear are 789 (27") and fronts are 801 (26"). I'm not sure how you got your percentages.

 

I apologize. Fronts are 769 (27") and rears are 801 (26"). Is that too big of a difference?

 

I just divided the rear by the front to get a ratio of rear to front. It looks like yours are right about exactly the same as the Z06 ratio, so you should be fine. Sorry it's not as simple as that.

 

Yeah.. I checked codes this morning an I have 0040, B0161, and B0561.

 

I had similar problems and I believe it is either the tread or size of the nitto invos tires. I still get engine drag active messages unless I run with TC off. I would get the service active handling and other messages. Be sure your tires are inflated properly ( I know that sounds dumb but it caused problems for me). Do a search for active drag and see all the people running invos getting the code. Try turning the TC off and see if you get the message.

 

I'm running G-Force TA KDW. And I've never seen the engine drag message. I still throw my codes regardless of TC on or off. But it seems to be more intermittent now that I've checked all my plugs and grounds. Unfortunately it still happens...