Konstantin

hello
I definately get the P0907 as an error Load system DME fault.

Ok I will get a new battery but thois one after I charged it it holds 12.5 volts even after a month seating there. Anyway I will get one or better I already have one as a spare for my other car.
I checked all conectro to the pedal assembly and cleaned them with a speciual tuner cleaner for electronic circuit.
park control is the Parktronic. Distance control when you park the car the one with the green yellow and redlights in the front and back of teh car. I found out sensor nr 12 rear left has a short.

I removed the DME cleaned everything with the tuner cleaner.
I could get one conector off at teh back of teh gearbox and clened. I can not get off the other three which are sitting close together on the right side 5 cm of the Transmision oil check plug. How do you remove them? They look clean no oil etc. also the car is very clean underside no oil leaking etc. It doesent look that it loses oil.
How do i remove the right Passenger seat to get to the Tiptronic ECU?

Konstantin

BTW my CT has two Batteries. should I replace both or only the one under the seat?

XR4Tim

There should be two round connectors at the front of the transmission pan. These are the ones you want to check. Simply twist the round housing counter-clockwise, and it should pull apart.

Konstantin

i cant see the conectors infront of the tranny? Are they infront of the front axle? then I have to remove the front undercover too.

Konstantin

some update:-)
I checked the batteries etc etc. They are ok both have13.9 v when the engine runn9ng and 12.8 v when the engine is off.
NOW!
I let the car running till it got warm and the engine shut of again.
THIS TIME I hade the Voltmetter atached to the charging conectors in front left of teh car and a load tester for the batterie and the durametric was recording both battreries.
I found out the engine stops when the batteries suddenly go from 14 v to almost 12.2 volt with the engine running!!! then sometimes it goes from 12.2 to 12.5V then 13.0 then back to 12.2 etc!!

After start the negine 3 times died again. Aftre the forth time teh batterie shows 13.9V an dthe engine runs for ever till i got bored from waiting.
I noticed on the Durametric that the starter batterie went at the end slowly from 13.9 V to 13.0 V.
The system board stays at 13.9-14 V.
So I gues it has something to do with the alternator. Is it possible that it does not charge teh batteries after a while when it get warm?. The strange thing is after 3-4 times trying to start the carthen it starts and all is ok again.

What is for sure is that the engine dies with a voltage of 12.2V on the system board batterie while the engine is running. Is this the batterie under the seat?

Thanks

deilenberger

Have you checked/cleaned/retightened the ground connection for the front battery - it's in front of the drivers seat apparently, and is prone to doing that sort of thing.

Konstantin

no never.I will check tomorow it is midnight here now

Konstantin

anyone has a pdf how to replace the generator? I want to check it if it is ok.maybe it doesent work fine when it is hot. But it works ok when cold and very hot.
Thanks

Konstantin

is this the conector you refer?
https://rennlist.com/forums/members/...83-bild-1.html

Konstantin

XR4Tim

That's not it. Based on your other posts, I would focus on your charging system issue. Check your battery ground, generator harness, and of course voltage output of the generator.

bigbuzuki

Konstantine, is your car equipped with Kessy and the plastic dummy key?

Konstantin

Yes i have kassy and the plastic key. I checked today the ground on the baterie and are all tight. Who knows how to remove the alternator?

bigbuzuki

Plastic key will use front battery for start.

Metal key will use rear battery for start.

Could be alternator but you could have a bad battery cell dragging your voltage down.

Try disconnecting the rear battery and running the car and see the results.

Konstantin

Hello are you sure about this? I thought the starter baterie in the rear always start the car. I will check but both bateries are fine and when the engine shut off then both bateries go low on voltage. 12.2 v while the engine runing is not good. Why both bateries losing voltage when it is geting warm? I still can no find infos where is the alternator? How to get access to it and howto check it?

Thanks