Are there codes to indicate 4ets is not perfoming as it should? That is, asside from getting a wheel off the ground and observing the the traction control working, is a way the tech folks can know if it's up to snuff?Also, are there improved electronics for my 99 430 available?And finally, I read something about a switch on the brake pedal that can be modified to allow 4ets to opperate while braking? True? How is it done?Thanksgary