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Old 14th November 2007, 20:41   #1
S62M5
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ABS, DBC and DCS lights are on

i have all three warning lights on ABS, DBC and DCS.

This all started about couple of weeks ago when i took the car for a drive. when i applied the breaks the pedal jerked back and forth and the lights went on. i removed the battery and the lights still remain on but the the break pedal does not jerk back and forth anymore. i was doing some research about this and many said it could be a faulty ABS sensor and there is a way to get them cleaned up using rubbing alcohol. just wanted to know where abs sensor box located under the hood? or any other remedy to fix the issue myself.

the car drives fine and the speedo reads correctly so i don't think its speed sensors. Full break job was done at the stealer about a month ago.
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Old 14th November 2007, 20:45   #2
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also "TIRECONTROL INACTIVE" comes on as well after driving for about 10-15 minutes, i dont know if its related.
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Old 14th November 2007, 23:15   #3
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Tire Control is completely unrelated - it has to do with the pressure in your tires being dis-similar.

Now that I think about it, though, having a completely flat tire could cause it to rotate at a different speed and make the DSC and the ABS have a nutty - check your tire pressure.

d-
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Old 14th November 2007, 23:17   #4
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I recognize Anti-Lock Brakes and I'm assuming DCS is Dynamic Stability Control, but I have no idea what DBC is.

I'd guess you have a bad wheel sensor - the pulsing in your brakes clearly indicates that the car believed it was losing traction. If you don't think you really did (ie. no snow, ice, sand, etc) then you must have a bad sensor or a bad control module.

d-
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Old 14th November 2007, 23:21   #5
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most likely a wheel speed sensor
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Old 14th November 2007, 23:26   #6
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Quote:
Originally Posted by S62M5 View Post
Full break job was done at the stealer about a month ago.
take it back to the stealer and have them correct it for free.

dbc = dynamic brake control
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Old 15th November 2007, 15:21   #7
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It has happened to me twice, first time an abs sensor went bad (cheap to fix) the second time it was the abs control unit (expensive). The unit itself is infront of the windscreen washer bottle on the left hand side as you look at the engine. It is the black plastic box which is attacted to a metal block with metal tubes coming out of it.
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Old 15th November 2007, 17:57   #8
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It happened on my Wife's 2006 Mini two weeks ago. All the same lights were on (including the tire sensor, but it didn't come on until a short time after start up).

Left front wheel sensor solved it ...
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Old 15th November 2007, 18:04   #9
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There may be a way to reset the abs sensors if it is a sensor problem. I cant remember exactly how to do it but I think you start the car with the dsc button pressed and keep it pressed for 10 seconds, maybe.
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Old 15th November 2007, 18:05   #10
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Quote:
Originally Posted by DouglasABaker View Post
Tire Control is completely unrelated - it has to do with the pressure in your tires being dis-similar.

Now that I think about it, though, having a completely flat tire could cause it to rotate at a different speed and make the DSC and the ABS have a nutty - check your tire pressure.

d-
Tire Control measures difference in wheel rotational speed, NOT TIRE PRESSURE.

If a sensor goes "south," it will illuminate the Tire Control after a short period of driving determines a difference in wheel speeds.
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