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Thread: Startup problems with Start-stop system and auto parking brake release

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  1. Startup problems with Start-stop system and auto parking brake release 
    #1
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    Hi,
    Apologies for the long post but it's a fairly specific problem that no-one at Audi seems to be able to help with:

    - Every time I try and start the car from cold the car never starts on the first press of the Start/Stop button (clutch pedal is depressed).
    - All the electrics come on but the engine does not turn over
    - The car will always start on a second press of the start/stop button (clutch pedal depressed) but then an error message appears on the dash' that says "Start-stop system: system fault. Function unavailable". Each time you press the "A OFF" button just below the SD1 slot (i.e. the button to turn the start-stop system on and off) you get the same error.
    - Also the Parking Brake auto release system doesn't work (the "A" button under the parking brake button will not come on no matter how many times you press it and you get another error message on the dash' saying "Parking brake auto release not available".
    - If you turn the car off at this point and then try to start it everything works fine; the car starts first time with no error messages and both the "A OFF" start-stop system, and "A" parking brake auto release works.
    - If you leave the car for 10 minutes and try to start it the same problem reappears - it's almost as if there's something in the startup sequence that is stopping it turning the engine over when it's cold and then causing the two faults.

    What I ususally have to do to make things work is the following:

    - Press start/stop (without the clutch depressed) so all the electrics fire up
    - Press start/stop again (without the clutch depressed), which performs a partial shutdown (some of the electrics stay on)
    - Press start/stop again (this time with the clutch depressed) - car starts and everything works as it should without error messages.

    There are no error codes when you connect it to the VAG diagnostics.

    Anyone any ideas???
    Thanks in advance.
     
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  2. Re: Startup problems with Start-stop system and auto parking brake release 
    #2
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    Hi Once it is running, dose the S/S work as normal and the auto parking brake as well. Have you demonstrated it to Audi and they confirm there is an issue, and is it in warranty ? if so I would give it to them saying sort it please .
    2015 FL S-line 2L ultra & 2003 225 TT Coupe
     
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  3. Re: Startup problems with Start-stop system and auto parking brake release 
    #3
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    Sound like the switch on the clutch pedal is faulty.
    Auto handbrake relies on detecting the clutch is up or down for it to release.
    Stop start is the same as it needs to knows the clutch position to stop and start.
     
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  4. Re: Startup problems with Start-stop system and auto parking brake release 
    #4
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    Is the battery the original?
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:
     
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