After an exhaustive search here, it appears almost everyone has used the Mod4Car module to solve the non-chirp problem. I have enough electrical issues as it is without giving the dealer a scapegoat to blame a modification. Some posts have shown their dealer could reprogram the car to chirp with locking, yet Park Place says no way, only on the SUV can that be done.
So, what's the truth? Can the stock set up be reprogrammed to chirp with lock/unlock (without leaving the glove box open etc.)?
I'm about the dissect the dash, use a pulse detector to capture the lock signal, convet that to an amplified output and MAKE it happen on my own. Very frustrating.
We spent a lot of time dissecting my Cayman with Mods4Cars chief developer and a PIWIS machine to see if there was a way to alarm chirp with PIWIS and there was not. What they literally had to do was make it chirp and capture the CAN BUS hex code that was issued to the control module to make it chirp and then program that hex code to issue when the code that comes across the can bus stating that the doors are locked (a different code) is received by the control module.
Remember you can always enable/disable the Mods4Car module so that a dealership cannot even tell it is there and basically it isn't, it is listening on the CAN BUS but not replying so it isn't doing anything unless it gets the signal to wake up and go active again. Right now Mods4Cars is running a group buy, a good time to pick up their module.
I've had the Mods4cars module in my car since October of '06, and it's been to several dealers (mostly the one in Las Vegas, but others as well) and I never turn it off, and no one has ever mentioned it... I don't think you have anything to worry about. Since I was used to the "non-chirp" on the last two late-model Porsches I've had, I got it for the passenger-side rear-view mirror dip while in reverse - really saves on the curb rash when parallel parking.
brad
Thank you all for the definitive info. I suppose I will have to decide how important the chirp is....nice to FINALLY know that it simply can't be done with onboard equipment!
Thanks again!
Slightly off the original question.
I'm curious on how they figured out the CAN bus code to chirp the horn if the PIWIS couldn't chirp it. Does the horn switch on the steering wheel activate the horn over the CAN bus? Otherwise I can see how they captured the code.
DanM
I don't recall exactly, but it could be that they left a glove box open, then used the key which would have created a chirp and they could have captured the stuff on the CAN bus line then.
