[s-cars] ABS Off Light Problem - VAG COM

[Tom Green]

Brian,

The lack of communication with the ABS points to a faulty electronic  
control
module under the rear seat.  The best course may be to source one from  
the
many cars being parted out.  My guess is they are common until the  
95.5 model.
It is easy to access under the back seat to confirm part numbers.

Tom

On Sep 17, 2009, at 9:19 AM, Brian Armstead wrote:

> Thanks for your reply Tom.  Mark did clear all codes, but the light  
> remains on...
>
> Brian
>
> Tom Green wrote:
>> I had mentioned in the fine print that some S4 owners were having   
>> problems
>> scanning the ABS module.   I guess we need an affirmation from at   
>> least one
>> that they can scan the module.
>>
>> I believe Ian has the Airbag control module mixed up with the  
>> ABS.   The airbag
>> controller and connectors for early models are indeed in the  
>> center  console.  The
>> ABS electronic controller is under the rear seat, drivers side.  I   
>> know of no direct
>> reading connectors for VAG-COM, though.  The fault codes are stored  
>> in  the ECU.
>>
>> It could be that the fault has been corrected but the fault  
>> remains  until cleared in
>> the ECU.  Try clearing all the codes and perhaps the light will  
>> clear  also.
>>
>> Tom
>>
>>
>>> -----Original Message-----
>>> Date: Wed, 16 Sep 2009 20:50:34 -0400
>>> From: "Mark Pollan" <mpollan1 at aol.com>
>>> Subject: Re: [s-cars] ABS Off Light Problem - VAG COM
>>> To: <s-car-list at audifans.com>
>>> Message-ID: <c3c.617310ad.37e2e1e4 at aim.com>
>>> Content-Type: text/plain;	charset="us-ascii"
>>>
>>> Gents:
>>>
>>> I met up with Brian this evening to pull codes and I could not  
>>> read/ connect
>>> to the ABS module.  I first ran Autoscan and some trivial codes  
>>> came  up but
>>> no reading on ABS.  Going directly to the ABS module and no   
>>> connection.  I
>>> tried several times to no avail.  I have access to an old HEX COM   
>>> with the
>>> OBD II connector and the 2x2 adapter dongle.  I would have  
>>> suspected  the
>>> dongle but connection was established with other controllers.
>>>
>>> Thoughts?  Is it possible the controller itself is messed up?  I   
>>> rang up
>>> Mark Turczyn as I had already pestered Manny Sanchez and Mark  
>>> though  maybe
>>> the no read condition is due to a bad connection to the ABS  
>>> controller
>>> itself.  Seem plausible?  Where might the controller be located as  
>>> I  gifted
>>> my Bentley to Mark when I sold the S6.
>>>
>>> Any and all insights are greatly appreciated.  Brian is a hell of  
>>> a  nice guy
>>> and I'd love to see this to closure but your help is definitely   
>>> needed.
>>>
>>> Thanks in advance,
>>>
>>> Mark
>>>
>>
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