Christiangarcia

hi, i have a problems, i send the audi to the service, and they have a problem with my 1996 c4 audi s6 turbo 2.3L with the start engine. They tell me, but i found rare, they tell me: "the ecu have a battery inside, and the problems is the battery is old, so the ECU lose the memory and need reprogram".

is this real or fake??
i search in internet but i canīt found nothing.
Help me friends.

scarman

NO, THERE IS NO BATTERY IN THE ECU. The memory in the ECU is non-volatile flash memory contained in flash chips and is not lost or destroyed by power loss.

If the vehicle battery is old and loses charge, a battery booster or jump start installed incorrectly can damage the ECU and prevent starting. There is a row of fuses just above the ECU under the passenger carpet. One of these protects the ECU and may have blown.

scarman

Where do you live?

The diagnostic information on this web site may be useful.

http://www.sjmautotechnik.com/

Christiangarcia

in Santiago, Chile, i will see the page, thank you for yours helps

scarman

We have active members in New Zealand and South Africa, but you are the first from South America.

Ask if you need more help. Post on the forum or ask via the private message if you have a specific problem you want to discuss.

UrS4boy

We *used to* have a forum member from Brazil, TripleBlackS6. Have not seen or heard about/from him for years.

https://www.audiworld.com/forums/alb...?albumid=62262

Christiangarcia

finally i found the problem: is the beru ignition coil, part number 034 905 105, have a idea where can found it?

thanks for yours help, my S6 have 50.000 kms, is wonderful condition, this is the only problem, the ignition coil work but in malefuntion form.

scarman

Yes. These suppliers will ship internationally. The Beru coil is identical to the part supplied by Audi. None of the replacement coils have the pins attached for the connector to the POS (Power Output Stage or coil controller) at the firewall. So, you need to source pins or splice the wires onto the old coil wire near the connector.

http://www.autohausaz.com/index.html

http://www.bimmerspecialist.com/usa/parts/

We started with the ECU question, now you have diagnosed a bad coil, so I sent the information above. Let us be sure we have this correct before you start buying expensive parts, OK? You mentioned a 2.3L engine but the S6 in North America has the 2.2L 20valve 5 cylinder AAN engine with individual coils for each cylinder. Your car is the same?

The original problem was the engine would not start. Correct?

Is this the same mechanic that has found a bad coil? Or, are you doing the work yourself? What are the indications that a coil is bad? Does the engine start now and just not run well? Has one specific coil been identified as bad? Have the POS units that the coils connect to been checked and found to be good? These questions are based on using the diagnostic from the FAQ listed at the top of the forum page on this web site. Here is the direct link:

https://www.audiworld.com/forums/sho...php?p=18838360

If the fuse for the coils just above the ECU has blown, be careful with troubleshooting. A shorted coil can damage the ECU.

If you are confident that the diagnosis is correct and a coil is bad, then, of course, continue the repair.

I can send you a used coil that has been working in my engine for much less than a new coil. You can send me a PM private message through this web site or email me directly at trgreen (at) comcast.net

UrS4boy

The PN you quote above is not correct. It was dropped on Feb.28,1992 and replaced with 034905101. More coil and Power Output Stage (POS) info is available HERE

Christiangarcia

My car is a 1996 S6 2.2L 20v turbo, is not 2.3, sorry for that.
The history is: I took the car to a technical service for a change of timing belt. A few days ago, the people of the service tell me: the s6 have a problem with the ignition coil, this supposedly was detected by the authorized technical service of audi. The change of timing belt is all ready, but that is the problem, the engine start but just not run well. This problem, supposedly, detected by audi people, is in one specific ignition coil, and they showed to me the ignition coil beru 034 905 105, and tell me that is the bad coil.

Now, i see in the ETOS manual, the ignition coil for a S6 is a 034 905 101, NOT that audi people showed to me.
And the user " URS4BOY " tell the same doubt, in feb/1992 that part was replaced for 034 905 101.

something rare has here........

or my s6 have the ignition coil 034 905 105, not the 034 905 101, but the catalogue says the opposite and you also.....
or definitively I am victim of robbery.

Tomorrow I will see the other ignition coil of my car....
and i will say that it happened.

Regards