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abs question 700 1987

posted by  someone claiming to be thor on  Thu Jan 17 05:44 CST 2002 [RELATED]

I have an 87 Bertone with of course abs. On backing out of my garage (regularly but not always) when applying the brake pedal the pedal "bumps" and a noise of a low pitched whir and clunk emanate from the right side trunk area. Is this the abs system "energizing" or resetting itself or WHAT? It does this only once, on the first backup of the day and never makes this sound when moving forward. Is this normal or do I have a problem? Otherwise the brakes seem to function well. Thanks. Steve








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abs question 700 1987

posted by  chris herbst on  Fri Jan 18 15:48 CST 2002
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last visit: Mon Oct 20 20:32 CST 2014
[RELATED]

If you can, try backing into your garage and see if the same thing happens when you drive out forwards.

If so, it's the one-time self test that the car does when it's been turned off. It does that to establish the system integrity, and thereafter continues to operate until the ign is turned off again.
--
Chris Herbst, near Chicago, IL. 93 940, 91 240, 90 240, 88 740, 87 240








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abs question 700 1987

uid 5238's pic
posted by  DM on  Thu Jan 17 07:10 CST 2002
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My understanding is that is normal. The ABS system goes through a self check and I think that is what you are hearing and feeling.
-Dave
--
1994 850 Bone Stock, 1988 745t a work in progress . . . http://communities.msn.com/Daves745tVolvoSite








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abs question 700 1987

posted by  JohnBin on  Thu Jan 17 06:59 CST 2002
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Seems normal to me.
You DO need to flush the brake system biannually.







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