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Old 26 May 2006, 09:41 pm
MajBach
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Default Recurring ABS mystery on 96 Accord

Hi all! I'm still having an ABS problem with my '96 Accord EX-R. It's been
acting up intermittently since late fall with no discernable pattern. The
problem began when the ABS would consistently kick in under normal - light
braking moments before reaching a full stop. IOW, every time I come to a
stop, as soon as I reach say about walking speed, the ABS kicks in and the
car 'coasts' about 2-3 feet before braking resumes. I hear the pump kick in
immediately afterwards for about 1 second (rebuilding the pressure) and the
pulse in the pedal is only once. The ABS light is not on nor does it come
on. The next time I get in the car, the ABS light MAY come on and stay
on..the car does the self test and the ABS disappears but as soon as I drive
it comes on. Then the problem disappears altogether for several weeks. There
is no pattern - one trip the ABS kicks in, the next it is fine, the next the
light is on and I have no ABS.

The modulator and pump were replaced years ago due to an accident.

From searches on the net, I am almost convinced that this has to do with a
sensor - simply because of the inconsistency. My question is - where are
these sensors and how do I inspect/clean/re-align them. Is there a way of
determining which sensor is acting up?

The only other possibility that it MIGHT be is flex hose? Not to long ago, I
had a front bearing replaced. The mechanic had never worked on this car
before and he spent at least 30 minutes giving it a once over because I had
asked him to address several problems in addition to the ABS. He noticed
that on set of pads on the front was wearing twice as fast as the other side
and told me that sometimes the flex hose can collapse internally. When the
brake pedal is released, the hose collapses from lack of pressure and doesn't
allow fluid to return, thereby keeping the caliper slightly engaged. I don't
know if this could lend to the ABS problem. When I took the car to him, the
ABS wasn't acting up nor had it been for a couple of months. Think I would
like to try cleaning the sensors first. All help is greatly appreciated!

MajBach


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Old 27 May 2006, 01:05 am
'Curly Q. Links'
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Default Re: Recurring ABS mystery on 96 Accord

MajBach wrote:
>
> Hi all! I'm still having an ABS problem with my '96 Accord EX-R. It's been
> acting up intermittently since late fall with no discernable pattern. The
> problem began when the ABS would consistently kick in under normal - light
> braking moments before reaching a full stop. IOW, every time I come to a
> stop, as soon as I reach say about walking speed, the ABS kicks in and the
> car 'coasts' about 2-3 feet before braking resumes. I hear the pump kick in
> immediately afterwards for about 1 second (rebuilding the pressure) and the
> pulse in the pedal is only once. The ABS light is not on nor does it come
> on. The next time I get in the car, the ABS light MAY come on and stay
> on..the car does the self test and the ABS disappears but as soon as I drive
> it comes on. Then the problem disappears altogether for several weeks. There
> is no pattern - one trip the ABS kicks in, the next it is fine, the next the
> light is on and I have no ABS.
>
> The modulator and pump were replaced years ago due to an accident.
>
> From searches on the net, I am almost convinced that this has to do with a
> sensor - simply because of the inconsistency. My question is - where are
> these sensors and how do I inspect/clean/re-align them. Is there a way of
> determining which sensor is acting up?
>
> The only other possibility that it MIGHT be is flex hose? Not to long ago, I
> had a front bearing replaced. The mechanic had never worked on this car
> before and he spent at least 30 minutes giving it a once over because I had
> asked him to address several problems in addition to the ABS. He noticed
> that on set of pads on the front was wearing twice as fast as the other side
> and told me that sometimes the flex hose can collapse internally. When the
> brake pedal is released, the hose collapses from lack of pressure and doesn't
> allow fluid to return, thereby keeping the caliper slightly engaged. I don't
> know if this could lend to the ABS problem. When I took the car to him, the
> ABS wasn't acting up nor had it been for a couple of months. Think I would
> like to try cleaning the sensors first. All help is greatly appreciated!
>
> MajBach


-------------------------------------

The set of pads is wearing because your sliders are sticking on that
side.

As to the ABS you're probably right about it being a sensor problem.
www.slhondaparts.com has the exploded diagrams for your car. The 'tone
rings' may be dirty with grease / grunge, or just way to wide a gap. A
bearing flopping around will throw the tolerance of the sensor out too,
apparently. Inspect the gaps. 1 mm is the spec, I think, 2 mm is normal
and works OK. The one he worked on would be first suspect. . .

Why don't you read the CODES for your ABS?

'Curly'
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  #3 (permalink)  
Old 27 May 2006, 07:01 am
MajBach
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Default Re: Recurring ABS mystery on 96 Accord

Hi, Curly, and thanks. Sliders were checked and were in new condition.
Another symptom that supports 'his' theory on the flex hose is that
sometimes when the car has sat overnight ( regardless of temperatures), the
brakes feel 'stuck', albeit very lightly and only when I initially take off.
By stuck, I mean same feeling as when the brakes freeze overnight after
being exposed to liquid water in freezing conditions.

Thanks for the link- I will check it out. Never done the CODES before and
thought I needed a special instrument.


> The set of pads is wearing because your sliders are sticking on that
> side.
>
> As to the ABS you're probably right about it being a sensor problem.
> www.slhondaparts.com has the exploded diagrams for your car. The 'tone
> rings' may be dirty with grease / grunge, or just way to wide a gap. A
> bearing flopping around will throw the tolerance of the sensor out too,
> apparently. Inspect the gaps. 1 mm is the spec, I think, 2 mm is normal
> and works OK. The one he worked on would be first suspect. . .
>
> Why don't you read the CODES for your ABS?
>
> 'Curly'



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