Question about 2001 BMW 5 Series

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My car is bmw 525i 2000 model asc sensor alwayes on after i change abs box

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  • Anonymous Mar 18, 2014

    Asc light is on and car wont change gears on its on

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If you changed the asc module, the module has to be programmed/coded after replacement. If it was a new part there should be no problem programming the new control unit. I would recommend taking the vehicle to the dealership to allow them to program the control unit.If you have access to the programming don't forget to take the asc module out of "end of belt line mode" and most likely the steering angle sensor will have to be aligned

Posted on May 03, 2009

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I have a 1999 BMW 323I five speed, but when ever I shift to 3rd gear the asc light comes on and the car will not pick up speed


ASC light is part of the ABS system. ASC means slip control system.When this light comes on because it is integrated with the DME or for a better term ECM (control module) It commands trottle reduction. The ASC uses the wheel speed sensor your only fix is get the ABS or (brake inspection) look at The computure engine management thinks you are slipping.

Aug 29, 2011 | 2000 Volvo S40

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I have bmw 530d and abs asc and other 1 its on after 2 miles i been on service and mecanic sed presure sensor interference,i change presure sensor and delithed all cods but its on agan.


Hi.The problem of your car sounds like a faulty ABS/ASC control unit. It is the common problem of this model cause the Control Unit is too close to exhaust manifold resulting to dammage internal parts of ABS/ASC control unit. But although this is the common problem of your car, I still suggesting you to re-hook up diagnostic tools and double check the condition of wiring harness, plug connections and power supply of related fault codes you will retrieved and if the problem still existing then I recommend you to replace the ABS/ASC Control unit and do Coding for new control unit.
I hope this tip will help you to solve your problem.
Thanks

Mar 08, 2010 | 1999 BMW 5 Series

1 Answer

My tracktion control light is on along with the break light the came on at the same time.


if you mean the asc and abs indicators then i would suspect the braking system.

there are a few points of failure.

1st the sensors on the wheels. if they fail the computer turns off the asc and abs.

the other area is the asc/abs controller, not the abs pump.

however, my bmw experiences lead me to the wet eci box.

the ecu compartment is under the windshield on the passenger side on E36 probably same location on an E46.

you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that compartment.

the bottom side of the circuit board gets wet and starts corrosion.

remove the ecu, take the bottom plate off, clean the bottom of the circuit board with alcohol and a soft tooth brush.

you should be able to see the signs of corrosion or conductive build up.

this gunk bridges solder points doing all sort s of wierd things to your car, including false sensor readings from asc/abs controllers and other sensors....

all the way to engine failure and worst case burnt and shorted wiring harness.

I'm on my 3rd ecu, took me and the repair boys a few years to figure this one out.

BTW: i would get that ecu mounted above that flat surface, use some sort of standoff to raise it so that it is not laying in the wet.

Feb 06, 2010 | 2001 BMW 330

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Recently got a 1999 m5 the asc indicator does not go off even if the button is pressed .Can anyone tell me why? thanks


the ASC is for auto stability control,,you probably got a bad sensor, anything from abs to height sensor,,,,,you need to get the car scanned to see what then code is,,thats why the light is on,,it disables the asc and abs

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Check to see if your brake pads and rotors are in good condition. Or if you have replaced the pads yourself and have not reset the wheel sensors this would cause the ABS Antilock Brake System light and the ASC Automatic Stability Control light to stay on as the ASC uses the ABS brakes with computer assistance to control the traction of the car if not fixed it can effect your rev limiter slowing performance

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ABS and ASC warning lights stay on 2000 530d


Check to see if your brake pads and rotors are in good condition. Or if you have replaced the pads yourself and have not reset the wheel sensors this would cause the ABS Antilock Brake System light and the ASC Automatic Stability Control light to stay on as the ASC uses the ABS brakes with computer assistance to control the car

Jul 06, 2009 | 1999 BMW 5 Series

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Bmw 520i 1999 abs/asc lights on diagnostic


Check to see if your brake pads and rotors are in good condition. Or if you have replaced the pads yourself and have not reset the wheel sensors this would cause the ABS Antilock Brake System light and the ASC Automatic Stability Control light to stay on as the ASC uses the ABS brakes with computer assistance to control the car

Jul 05, 2009 | 1999 BMW 323 Series

1 Answer

Asc alwayes on after i changed he ABS box


hello mazeer, when you changed the abs/dsc/asc control unit did you have the replacement coded to your vehicle. Also after changing to another unit, it is usually necessary to recalibrate the sensors. if your vehicle does not recognize the replacement unit, you will have a constant warning lamp. Most dealers/shops charge appr. 1hr to code and calibrate the control unit.

Apr 22, 2009 | 2001 BMW 5 Series

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