Asc Or Asc+t ??? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 05-28-2005, 12:42 PM
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Hello 5-series fans,

I've got a 5-speed manual '94 530i and am about to embark on replacing my rear calipers, rotors, pads, fluid, etc. The procedure is quite different for bleeding the lines for an ASC+T system than for an ASC system (without the +T). So, I'm not sure how I can be positive as to which one I have.

I have a button on the dash that is marked "ASC", and when activated, illuminates the cockpit display with an /!\ surrounded by an arrow. Since I don't have the owner's manual for the car and haven't seen other 530's equipped with ASC+T, I can't be sure of what mine is equipped with.

Anybody know how I can tell for sure?
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#2 (permalink) Old 05-28-2005, 05:39 PM
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Jrf786 is an unknown quantity at this point
You shouldnt have ASC+T I dont think that started until 99 or 2000 in the 5 series.
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#3 (permalink) Old 05-28-2005, 07:12 PM
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BeelZibub is an unknown quantity at this point
ASC+T started with the invent of the e39 in 1996 (in the UKat least).

You seem to be confused as to when it is activated - When you start the car ASC or ASC +T is "ACTIVATED", pressing the button "DEACTIVATES IT" - THINK ABOUT IT, THERE IS A BUTTON TO TURN "OFF" THE SAFETY FEATURES NOT TURN THEM ON. If you start the car and then give it some shit through a few bends you will often see the light come on momentarily, this is to show you that the ASC or ASC + T has kicked in cos you are pushing the car - as soon as it loses traction the computer compensates for your actions AND warns you by lighting the light. However, even on an ASC+T car the button only has ASC written on it!

Personally, bleeding brakes on an ASC or ASC+T should be exactly the same - you are just dispelling air from the system and traction control is naff all to do with it - asc or asc+t is controlled by sensors (THE ABS SENSORS IN FACT) NOT how much air is or isn't in the braking sytem.
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#4 (permalink) Old 05-30-2005, 01:05 AM
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d3ity will become famous soon enough d3ity will become famous soon enough
I believe my 95 e34 has ASC+T. Its listed in the manual circa 1995.

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#5 (permalink) Old 05-31-2005, 05:55 PM
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coffeeman is an unknown quantity at this point
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Seems like the consensus is against my car having ASC+T (though the '95 has it). I'm going to proceed with bleeding the lines per the instructions for cars without the +T system and see what happens!

-btw, thanks to BeelZibub for the great explanation of the traction control system! Guess the keyword there was AUTOMATIC stability control. d'oh! ghead

Geoff
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