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Volkswagen Jetta, Golf, GTI: 1999-2005, R32: 2004 (A4) GTI 1.8t Service manual Wiring diagram


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Last Post: Jun 6, 2005 10:55 AM Last Post By: Art
onizuka318

Posts: 1
Registered: 06/04/05
GTI 1.8t Service manual Wiring diagram
Posted: Jun 4, 2005 1:50 PM
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Does anybody on here actually OWN the manual? If so, i would like to know before i buy the manual, does it include an ecu wiring diagram? I need to find the rpm wires and Speed wires and want to be completely sure that it has them in there before i buy. I need these wires to make my turbo timer work properly. THX!!
Art

Posts: 2,741
Registered: 09/08/00
Re: GTI 1.8t Service manual Wiring diagram
Posted: Jun 6, 2005 10:55 AM   in response to: onizuka318 in response to: onizuka318
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Good Morning,

VW/Audi does not publish ECM wiring diagrams. Ever. You can generally determine engine speed and vehicle speed by studying the engine management wiring diagram.

However, many modern VW systems use signal multiplexing via the CAN-bus, so there may not be separate wires for those functions. You will probably need to find a way to spin out those two signals from the CAN-bus. Guys installing an aftermarket navigation system run into the same sort of problems.

You need to contact the turbo-timer manufacturer for details. Of course they will tell you to contact VW for that information. VW will direct you to us here at Bentley as a source, and we don't have that type of information since it is not factory. Pass the buck, since I'm telling to go back to the manufacturer.

So you get the big run around! The answer is that you are not likely to get the data you need from VW or us since it is not stock. Turbo-timer may not know since they supply a "fitzall" kit. Your very best bet is to ask if anyone here has installed one of these neat little devices. Another very good place to ask is on the vwvortex site. Those folks get really into modifications on the 1.8T engine.

Arthur LeBrun
Bentley Publishers

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