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mgsgray ![]() Newbie ![]() Joined: 31-March-2009 Status: Offline Points: 11 |
![]() ![]() ![]() ![]() ![]() Posted: 22-October-2009 at 18:02 |
All, Any assistance appreciated. 2 weeks ago i had a blowout. Tyre shredded and sheared through the rear ABS cable. Replaced tyre and reconnected cable and all was well. Today i have an ABS warning light and the front weeks lock up under heavy breaking. In addition i have intermittent loss of the MPG guage and speedo. Ive checked the fuses and the ABS cable to make sure its not arking out but now at a loss. Cheers and Regards "523i Touring Auto"
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Dergside ![]() Really Senior Member II ![]() Joined: 16-May-2004 Location: Mid West, Ireland Status: Offline Points: 4000 |
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Front or rear tyre?
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Andrew Rolland ![]() Moderator Group ![]() ![]() Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579 |
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I am assuming you have an E39 5er i.e. the previous model. If so I had the same fault with the instrument dials which never re-occured after I replaced the battery. The E39 is prone to weird and wonderful electrical faults which increase in frequency as the battery gets older and less efficent. When you say re-connected the cable do you mean you have spliced the wires together or replaced the whole wheel sensor unit? If you have spliced the cables yourself, double check it for shorts. It is not uncommon for the wire on the car side of the wheel sensor connector to short out, which means replacing the wheel sensor will not cure the fault. If you have the ABS warning light on your dash you have lost the ABS assistance so yeah your wheels will lock up under heavy braking. A diagnostic check will confirm what the problem is with the ABS system. Which rear tyre blew out? Does the cruise work? The cruise is controlled by one of the rear wheel sensors. How are the transmission shifts? The front wheel sensors provide input to the transmission to determine its shift change points. Knackered front wheel sensors which cause the ABS/ASC light to come on can also be diagnosed by rough transmission shifts. HTH Andrew |
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Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto |
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bmwcare ![]() Really Senior Member I ![]() Joined: 02-June-2006 Location: Galway Status: Offline Points: 321 |
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95% LH Rear Speed SEnsor and/or Wiring 5% ASC Control Unit |
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BMW & Mercedes Specialist.
Galway & Surrounding Areas. www.bmwcare.com www.mercedescare.com All BMW models covered including E60/E90/F01/F10 with flash programming/CIP/coding as required |
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mgsgray ![]() Newbie ![]() Joined: 31-March-2009 Status: Offline Points: 11 |
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Sorry guys, a bit vague with the info. It was the rear offside tyre, wires were spliced and coated in tape. Shifting through the box on auto and tip is fine. Car is 99 V Plate e39. One other thing thats just occoured since my original post is the range meter fluctuates by 20 miles either way at approx 30 second intervals. Cheers |
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Dergside ![]() Really Senior Member II ![]() Joined: 16-May-2004 Location: Mid West, Ireland Status: Offline Points: 4000 |
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Sorry... Realize that it was a stupid question - didn't read the op carefully enough. I would agree with bmwcare - abs/asc sensor first port of call for attention. Edited by Dergside |
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Now: BMW 523i SE '00, 318i SE - e91 '07, 325i Coupe '93.
Prev: e46 328i SE Touring, 330Ci, 318Ci. e39 523i SE. e36 325i Coupe *2, 323i SE, 316iSE. e30 325iSE 2dr, 320i Conv, 320i 2dr, 316i. |
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mgsgray ![]() Newbie ![]() Joined: 31-March-2009 Status: Offline Points: 11 |
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All, Finally found the solution to this problem, Apologies if it has been covered elsewhere in the forum but if it helps one person with the same issue then its a winner. ABS Module was the fault. The bosch 5.7 module is prone to failure and caused all sorts of gremlins. Random wheel sensor faults (all replaced) Power fluctuations (who Knows!) Loss of top wiper speed and speedo Fluctuating range guage. Boys to fix it are at http://ecu-testing.com/abs_pump_modules.html at £250 its not cheap but i have spent that on diagnostics and sensors twice over. Cheers
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