[s-cars] Brake system/hydraulics system Warning

[Carlos Fangmeier]

Hi Cole

Thanks to your advise I found this web page, with instruction to test 
the break system http://20v.org/brakprob.htm#bomb. But none of the test 
was successfully. In my car the alarm is only triggered when the Tº goes 
over 90C.
I changed the break fluid to, but the problem continues.
Now I don't know if there is a faulty sensor or the engine shouldn't run 
over 90C.

Best regards


Carlos

P Cole wrote:
> On Fri, 30 Mar 2007 20:27:36 +0000, Carlos Fangmeier wrote:
>
>   
>> Hi everybody, this is my first post to this list, I hope somebody can 
>> help me.
>>
>> I own a audi S4 '94 and for a time ago I'm getting the Brake 
>> System/Hydrulic System warning. I checked both fluid levels and they are 
>> ok. How can I check if the "operanting pressure of hydraulic brake 
>> servo" (instruction manual ) is too low?
>>     
>
> These cars have an accumulator (hydraulic ) in the brake booster system. It's known on the
> list as a "bomb" because that's what it looks like ( about 3" in diameter, round with hose
> attachments) When these fail the booster/accumulator system pressure sensor will trigger the dash 
> light.
>
> Initial indications sometimes have the light flashing only occasionally.
>
> For full symptoms and fix do a search in the archives on "bomb" fix.
>
>
>
>
> The brake light (check) in the system can be triggered
>
>   
>> Another information about this warning, it always goes on when the 
>> temperature reach around 95§C
>>
>>     
>
> The break pressure is influenced by temp. My 200 20vtq does this too.
>
>   
>> Best regards
>>
>>
>> Carlos F.
>> _______________________________________________
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>> S-CAR-List at audifans.com
>> http://www.audifans.com/mailman/listinfo/s-car-list
>>     
>
> --
> //************************
> Paul R. Cole:
> '83 Urq Helios Blue ( SAR) #900335		
> '91 CQ Indigo Mettalic Blue, 143k miles- daily driver
> '91 200 TQ 20v- still going strong  @335+k!!. Old cars-84x2 CGT, 89 200tq
> Bloomington,MN
> pcole at mn.rr.com #  Powered by OS/2 Warp 4
> //---------------------------------------
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