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Old 11-10-2012, 10:22 AM   #16
RayPooley
Registered User
 
Join Date: Jul 2012
Location: Liverpool
Posts: 1,440
My Ride: 320i SE Coupe
Quote:
Originally Posted by dmax View Post
First, I think you should begin that DSC off test now, before you replace the crank sensor.

I do think I've heard of a few incidents where the car activated the brakes on its own...and there are many incidents of wheel speed sensor failings. Not infrequently, those failing have to do with the connector or wire. There's supposed to be a waterproof gasket in there, but I know they can fall out. But, I'm pretty sure you'd find speed sensor codes. I believe it's a myth, that you can fix speed sensors by cleaning the magnets in the hub, but I have read of a few having success with that.

You recall if your car was pushing over to a particular side when it 'cut out'? That would at least help you figure out which side an issue might be on.

Oh, one other thought about this 'brake activating' thought. The brake feeling you're getting might also be just the effect of the engine stopping, which it sounds like it is...then, because the car is moving and in gear, it 'push starts' itself back to life.
"... it 'push starts' itself back to life". That's exactly why I assumed it was cut out. No pulling at all but you wouldn't expect that if the DSC slammed the brakes on uniformally. I am driving without the DSC and will continue to do so for the time being. I've never really given the DSC much thought but I read up on it last night and the more I read the more it seemed feasible, in spite of the absence of DSC codes. There was no CEL either which you would expect with a crank sensor failure. The other thing that made me think of it was that every now and again I drive with my heavy boots on. The soles have a large lip on them and on occasion, when I am braking, I push the clutch in and my left boot sole catches the lip on my right boot sole and presses the brake as well. I did it today and it was just like what happened on Thursday, but without the dashboard lights coming on. (No, I didn't have my big boots on Thursday night). So the DSC stays off for the forseeable future. Trouble is the default is ON. I have to question the practicality of taking control of the braking away from an experienced human. Its like putting it in the hands of a light bulb. Stupid. I might actually look at disabling it by removing fuses or something.
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