tach? update

kixbax · 02-14-2006, 01:55 PM

where does the signal wire go o a 5000 turbo? the stock tach does not always work. and if you know do you have a pic of it?

Adam Mowafy · 02-14-2006, 03:59 PM

http://www.sjmautotechnik.com/troubl.../ecupinpc.html

MarkPan · 02-14-2006, 11:17 PM

forget the pinout exactly.

its a 15v pk-pk or so sine wave, 135 cycles per revolution.

then the ECU has a line out to the tach. I dont know what sort of signal it sends it though. perhaps just TTL buffered version of the original. maybe something else... frequency dependent voltage perhaps.

kixbax · 02-15-2006, 07:38 PM

i an kinda a tard when it comes to a wiring diagram. can you tell me what color the wire is.

thanx
jason
87 audi 5000 turbo

Adam Mowafy · 02-16-2006, 05:27 AM

02-14-2006, 03:59 PM	#2
Adam Mowafy AudiWorld Super User Garage is empty, add now Join Date: Jan 2003 Posts: 2,856	ECU Pin out http://www.sjmautotechnik.com/troubl.../ecupinpc.html __________________ Adam in Michigan -90 Audi V8 Quattro V8 twin turbo -90 Audi V8 Quattro -80 Scout II complete fiberglass conversion -72 Ford Maverick w/302 -72 Honda CB550

02-14-2006, 11:17 PM	#3
MarkPan AudiWorld Senior Member Garage is empty, add now Join Date: Apr 2004 Posts: 898	the tach sensor is one of the shielded wires going to the ECU (yellow) forget the pinout exactly. its a 15v pk-pk or so sine wave, 135 cycles per revolution. then the ECU has a line out to the tach. I dont know what sort of signal it sends it though. perhaps just TTL buffered version of the original. maybe something else... frequency dependent voltage perhaps.

02-15-2006, 07:38 PM	#4
kixbax New Member Garage is empty, add now Join Date: Oct 2005 Posts: 92	Re: ECU Pin out i an kinda a tard when it comes to a wiring diagram. can you tell me what color the wire is. thanx jason 87 audi 5000 turbo

02-16-2006, 05:27 AM	#5
Adam Mowafy AudiWorld Super User Garage is empty, add now Join Date: Jan 2003 Posts: 2,856	just look at the number on the pin........ __________________ Adam in Michigan -90 Audi V8 Quattro V8 twin turbo -90 Audi V8 Quattro -80 Scout II complete fiberglass conversion -72 Ford Maverick w/302 -72 Honda CB550

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