Radio code savers and airbags- IMPORTANT
peschulz at cisco.com
Fri Nov 1 12:10:56 EST 2002
[ Picked text/plain from multipart/alternative ]
At 12:04 PM 11/1/2002 -0500, you wrote:
>Thats pretty wild Peter. I could almost swear that the Bentley manual shows
>it on the driver side.
From Scott Mockry's website....
STEERING WHEEL REMOVAL WITH AIRBAG
PLEASE NOTE: THE AIRBAG SYSTEM IN YOUR 1989-91 AUDI IS DESIGNED TO SAVE THE LIFE OF THE DRIVER DURING A SEVERE FRONTAL COLLISION.
IT IS CRITICAL THAT ANYONE SERVICING OR REPAIRING THE AIR BAG SYSTEM ARE QUALIFIED TO PERFORM SAID REPAIRS AND CHECKS. IF IN DOUBT,
HAVE YOUR LOCAL AUDI DEALER SERVICE YOUR AIR BAG SYSTEM.
THE MECHANIC, SERVICE TECHNICIAN OR VEHICLE OWNER COULD BE HELD RESPONSIBLE AND LIABLE FOR ANY DAMAGES OR DEATHS CAUSED IF
THE AIR BAG SYSTEM MALFUNCTIONS DUE TO THEIR NEGLIGENCE.
STEERING WHEEL REMOVAL:
The steering wheel removal procedure for the 1989-91 200TQ cars with an airbag does indicate that you must disconnect the airbag power feed red connector. THE
BENTLEY REPAIR MANUAL SHOULD BE CONSULTED BEFORE WORKING ON YOUR AIR BAG SYSTEM.
This red single wire connector is located in front of the center console area, behind the passenger side center console "side" trim cover. This is the trim cover that extends
forward of the center console area, partially under the dash, just in front of the area where the ash tray is located.
NOTE: The 1992-95 Audi S4 has this air bag power connector located in a different location, above the ECU mounting area on the passenger side floor area behind the carpet,
at the top of the plastic housing above where the circuit breakers are mounted.
Disconnecting the vehicle battery WILL NOT DISABLE THE AIR BAG CIRCUIT!!!
>Anyway, thanks for the tip!!
>----- Original Message -----
>From: "Peter Schulz" <peschulz at cisco.com>
>To: <brett at cloud9.net>; "John Corbs" <jcorbs at gtresort.com>
>Cc: "200q20v" <200q20v at audifans.com>
>Sent: Friday, November 01, 2002 9:15 AM
>Subject: Re: Radio code savers and airbags- IMPORTANT
>> The power connector for the airbag is on the PASSENGER side of the
>> I believe that it is held by a philips screw on the side, tabs on the
>console, and one additional screw underneath and behind the glovebox.
>> remove screws, pull out the side piece and the connector is mounted to the
>> At 07:37 AM 11/1/2002 -0500, you wrote:
>> >I recently had to take the wheel off to replace the left instrument
>> >cluster and followed these instructions.
>> >Used the 9v battery solution without a diode. Fortunately my friend
>> >garage I was using pointed out the risk of turning other things on. As
>> >was, the 9v got very hot.
>> >I located what I believe was the wire for the airbag power supply and
>> >disconnected it as instructed. HOWEVER mine did not look anything like
>> >one in the diagram. The good news was that it appeared to be the only
>> >option that was accessible from that side, so crossed my fingers and had
>> >----- Original Message -----
>> >From: "Brett Dikeman" <brett at cloud9.net>
>> >To: <human747 at attbi.com>; "Lines Peter" <Peterl at Warn.com>
>> >Cc: <gkot at adelphia.net>; <quattro at audifans.com>; <200q20v at audifans.com>
>> >Sent: Friday, November 01, 2002 2:42 AM
>> >Subject: Radio code savers and airbags- IMPORTANT
>> >> At 1:00 PM -0500 10/31/02, Huw Powell wrote:
>> >> >Putting a diode in the doohickey you are making will prevent this
>> >> >reversed current flow, which, as you point out, would be very bad for
>> >> >the 9 volt battery. 1 amp diodes are pretty cheap at RS as well.
>> >> Page 68.30A of the 100/200 Bentley covers this- and Audi recommends a
>> >> diode too. They also mention Snap On makes a prebuilt version.
>> >> >Another minor warning, be careful to avoid turning anywthing on in the
>> >> >car while this is set up, if you pull that 9v down far enough you'll
>> >> >lose the radio anyway. Not sure if the 9v battery has enough oomph to
>> >> >run the interior light(s), door chime, etc.
>> >> A slightly bigger warning here- on the same page, is a boxed note,
>> >> which I quote:
>> >> (bold)WARNING - ALWAYS(/bold) separate airbag power supply connector
>> >> before using a computer memory saver. Failure to do so may result in
>> >> accidental activation of the airbag."
>> >> The diagram shows a single-pin cylindrical connector, and identifies
>> >> it as being "located behind the center console." Further
>> >> instructions identify it as being on the driver's side, and easily
>> >> accessed- remove the side panel in the driver's footwell(ie, the
>> >> carpeted panel right where your right knee would rest.) I've removed
>> >> that panel before- I think there's barely two screws involved. I
>> >> strongly suggest reviewing this section of the Bentley lest one
>> >> unplug the wrong connector.
>> >> Rarely does the Bentley offer such warnings without merit. In fact,
>> >> a quick search of the web turns up the answer; google to the rescue.
>> >> I think I searched for "computer memory saver tool"(in quotes to
>> >> specify the phrase) along with the word 'airbag'.) I found a
>> >> discussion on the BMW list whereby an engineer, who worked on such
>> >> systems, reveals the reason - and it makes sense.
>> >> A good parallel here would be old Apple II's- if you flicked the
>> >> power supply on+off, or tripped on the power cord...sometimes it
>> >> would survive, but most of the time- you'd get a really nasty screen
>> >> of flashing characters; sometimes the system would hiccup and start
>> >> executing another part of the program and (very quickly) crash.
>> >> Apparently, the risk is that early airbag controllers were not very
>> >> foolproof and could accidentally, during/after a "brownout", get
>> >> confused- and possibly end up executing "set off the airbag" code.
>> >> Lack of battery power isn't a problem, by the way- the airbag system
>> >> has its own energy supply, located, along with the sensor, in the
>> >> center console...roughly under the ashtray, if I read the diagrams
>> >> correctly.
>> >> To be honest, I have no idea why this would be different from
>> >> situations such as a dead/dying battery or charging system
>> >> problems-but I personally am not one to argue with the Bentley when
>> >> explosives are involved :-)
>> >> Brett
>> >> --
>> >> ----
>> >> "They that give up essential liberty to obtain temporary
>> >> safety deserve neither liberty nor safety." - Ben Franklin
>> >> http://www.users.cloud9.net/~brett/
>> >> http://www.apple.com/switch/
>> >> _______________________________________________
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>> Peter Schulz
>> 1990 CQ
>> 1991 200 20v TQW indigo mica
>> 1991 200 20v TQW titanium grey
>> Chelmsford, MA USA
>> peschulz at cisco.com
1991 200 20v TQW indigo mica
1991 200 20v TQW titanium grey
Chelmsford, MA USA
peschulz at cisco.com
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