ABS fault lights diagnostic - BMW Luxury Touring Community
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post #1 of 3 Old Dec 24th, 2005, 7:27 am Thread Starter
Join Date: Jul 2005
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ABS fault lights diagnostic

Does anybody know what the ABS & General warning lights flashing alternately at 4HZ mean. I have looked at the diagnostic sheet and it does not show this perticular sequence. Thanks.
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post #2 of 3 Old Dec 24th, 2005, 8:24 am
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Location: Hammond, LA, USA
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Check rear res for fluid level on brake system. remember there are two res.s, one is hidden under side panel. I removed several screws and pulled panel out enough to access res. The proper way is quite involved, my way takes a few minutes. BMW shop tech. showed me that trick.

I use a baby aspirator to refill res, no mess, about $3.00 amc. A friend uses a syringe for irrigating dental work, others use a drinking straw. maybe you'll come up with a different idea how to refill res.

My son reminded me not to keep brake fluid after opening for long periods of time it will absorb water from humidity. It is not very expensive so easy to replace.
Hope that sends you in the right direction.


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post #3 of 3 Old Dec 24th, 2005, 10:39 am
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ABS fault lights diagnostic

Ditto to NOGILLS2 response.

I had the same fault last October while riding the Blue Ridge. All seemed well with brakes and no apperant reason for fault. Called dealer while on the road and they told me probably low rear reservoir fluid. Note; dealer had just completed annual service to include break bleed before I left on trip. Dealer asked questions to determine that there was no major issues and then gave me the green light to complete trip and bring bike in when I got home.

Turned out that rear reservoir (hidden one under right side plastic) was a little low. I'm under warranty, so I let dealer take care of it, but if need be you can get fluid to the reservoir and top off with syringe, tubing, straw etc...
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