Quote:
Originally Posted by rjahl
Just key-on the ignition for a few seconds without starting. Turn off the ignition and then start the car. During the initial key on you should be able to hear the valvetronic motor run stop to stop and relearn, takes maybe two seconds.
|
I know of this procedure, but is it also true of early model E90s (11/2005). I've seen some posts saying the magnesium valve cover n52 models don't have that ability.
I've done some more research and I found there are two different service functions
1. Valvetronic Start Up (This is the 20 minute procedure I've seen used on F series cars, the car is running during the procedure so no battery charger is necessary. Maybe this is a more advanced ISTA/D Calibration for fine tuning the motor as it is not present in ISTA+ for my model)
2. Learning Valvetronic Limit Positions (I believe this is the two second procedure, it's the only option available in ISTA+ under Engine Electronics service function)