TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Help, does anyone know the wiring schematic for the power to the ecu

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Old May 25, 2006 | 11:17 AM
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Default Help, does anyone know the wiring schematic for the power to the ecu

Vag-com can't read the ecu, was told the ecu is not getting any power, anyone have any ideas were too start looking?
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Old May 25, 2006 | 11:21 AM
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Hummmm, so you're saying your car will not start ?
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Old May 25, 2006 | 11:23 AM
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That is true Gil.........
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Old May 25, 2006 | 11:27 AM
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Default ok, "power to the ECM" starts with the battery, not likely the wiring harness>>

to the ECM "just blew up" soooo
1) does it crank?
2) have you tested the voltage with a digital VOM?
3) What was it doing when it Quit running?
4) The obvious BIG question is the battery new... most '01's need a battery by now
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Old May 25, 2006 | 11:35 AM
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Default New battery last month also new alternator, car was running fine after

a fill-up, washed it than it started up drove about 120 yards it stalled........started back up CEL came on drove 250 yards ran fine, turned it off went inside for about 1 hour, would not restart , turns over fine , timing belt is ok 2 months ago, Vag reads my wifes beetle fine but does not make the connection to mine. Car was not driven hard previously. Have a volt meter were do I check?
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Old May 25, 2006 | 11:59 AM
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Default Push the car into the James River....>

JK!!! Maybe it's a fuse problem. Series of fuses around the battery? I assume the voltage has been checked at the ECU.
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Old May 25, 2006 | 12:10 PM
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Don't we have enough "toxins" in there already? ;-)
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Old May 25, 2006 | 12:14 PM
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True. I should be more enviro-friendly ;-)
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Old May 25, 2006 | 12:58 PM
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Default more hummm new battery-did they say why new alternator? Volt check is with Key off, across >>

the + & - battery terminals directly... 12.x higher the better

Is the LCD screen on the dash look normal, or does it flicker, look dim?

You don't know your codes since won't read VAG...

Unknown battery drain?

Let's see what others say.
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