Harleydave

2005 C6....having a few problems and need some help. When trying to start the car the computer does not recognize that my foot is on the brake..so it won't start....eventually I can get it started but most of time the DIC say "press bake pedal to start".

Now my brake lights are staying on while I'm driving....anyone have these problems before??

Appreciate any advice...

Dave

RicK T

I recommend taking it someplace for a real diagnosis before trying to guess and throw parts at it. It could be simple or complex and expensive. Maybe just a brake position sensor or maybe the BCM.

Here's just one discussion with a couple more cases added: (I know you apparently don't have the Service Active Handling msg)

http://forums.corvetteforum.com/c6-t...ng-system.html

Harleydave

Thanks for the thread....my Service Active handling" light is on also.

cclive

I was thinking that it could be as simple as the brake light switch at the pedal, until you mentioned the active handling light. Call me stumped now...

v26278

I would invest in a code reader as the first step, and see what code is associated with the "service AH" message. I know there are places that will read the code for free but I prefer to have my own.

Harleydave

Thanks for the thread link....it is the exact same symptoms I am experiencing....this gives me a great place to start.

08 ATOMIC-Z

I had this problem in my 08 Z06. It was the BCM that had gone bad.

Harleydave

Thanks....I will have the BCM checked next week....

Dave

Husker C6

Had the same problem on my 07. Had the brake position sensor replaced, still had the problem. Replaced the BCM and haven't had any issues since.

golia

Sorry, what's BCM?

RicK T

BCM = Body Control Module

It's the main brain for the whole car. It's located under the passenger side footwell board, below the fuse block.

Edit: Oh, I should say that replacing the BCM is NOT a Do It Yourself repair. The new one requires complete programming by a dealer with a Tech II.

I hope you have a way to properly diagnose your issue and IF your BCM is bad I hope you have someplace to do the job correctly and competently.

golia

Thank you, you really are very kind

AORoads

That's what I thought: brake light switch. But then I thought: do our cars even have a brake light switch any more, or is that "old tech?"

Harleydave

Body Control Module....

Harleydave

Update: thanks for all the members comments....One member suggested I check all the connection harnesses into the BCM module....moving and pressing on them...and now the car is back to normal.....brake lights are not staying on...car starts every time ....Service Active Handling light not on...wow! Just saved me several hundred dollars! Thanks again.....

WhiteDevil828

The exact same thing happened to me last august. It is the BCM, NOT THE BRAKE POSITION SENSOR, don't let the dealer talk you into trying the BPS first. I read about that fix first and when that didn't work the BCM was replaced and that solved the problem. I, stupidly, was convinced by my local chevy dealer that it was the BPS, even after I showed him the thread. After replacement and a $400 walletectemy, it DID NOT solve the problem. They then replaced the BCM, problem solved. Only problem was it cost me another $500. Don't let this happen to you!!

I just read your last post and I hope your problem is solved. But just as a heads up, I also fiddled with the wiring and it temporarily solved the problem for me but about a month later it came back with a vengeance. I was stranded at a car show for 2 hours after it ended trying to get the car to recognize my foot was on the brake so I could start it and shift out of park. Sorry I'm the one to tell you this and I hope I'm wrong, but you don't want to get stuck somewhere and not be able to shift out of park. Good luck.

cclive

I probably wouldn't depend on just a wiggling of the wires as a permanent repair. I would disconnect the big connectors, spray with a good electrical contact cleaner and then carefully re-connect them. The contact cleaner should have an anti corrosion agent in it..especially considering that you live in a humid place..

Harleydave

Good advice...I do plan to clean all the connectors....but at least it is working until I can get to it.....I wonder how many BCM's have been replaced that did not need to be??

Dave

cclive

I agree and I'll bet that more BCMs were actually OK than were actually defective. It is certainly possible to have a BCM go bad BUT as a solid state device, the connectors are much more likely to be the culprit than the BCM itself. Nice that yours worked out the way it did.

To me, the vibration of the car as well as the additional moisture and corrosion in a car environment are the reasons for this. Compare the environment of the BCM versus the environment of a TV in your house. The BCM has a much rougher life.

WhiteDevil828

Again, I hope for your wallets sake I'm wrong but when I wrote I fiddled with the wiring, What I did was clean all if the connectors on the BCM and the wiring harness and used an air compressor to blow out any residual dust that might have collected. I had read about doing that from an older thread. It seemed to solve the problem, but after it happened again that's when I resorted to chevy service.