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Request a how-to › Post a reply › Re: How to get RPM signal in the GTI 138?

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[quote="erick3.14"][quote="Lee"]2.0GTi
[IMG]http://i304.photobucket.com/albums/nn186/leesablade/ScreenShot104.jpg~original[/IMG]
[IMG]http://i304.photobucket.com/albums/nn186/leesablade/ScreenShot105.jpg~original[/IMG]
[IMG]http://i304.photobucket.com/albums/nn186/leesablade/ScreenShot106.jpg~original[/IMG]
[IMG]http://i304.photobucket.com/albums/nn186/leesablade/ScreenShot107.jpg~original[/IMG]

1.9D
[IMG]http://i304.photobucket.com/albums/nn186/leesablade/ScreenShot108.jpg~original[/IMG][/quote]

Lee,
thanks for the diagrams and information. Sorry to ask, which software is that?  I use the ServiceBox/Sedre to get the diagrams and is very similar to that, but mine doesn't give the ECU connector detailed as yours...

As mentioned before, my ECU is a Magnetti Marelli from a 307 2.0 16v SW . The diagram is same as yours.

I tried to get the signal from 2 different places:
- directly from the ENGINE SPEED SENSOR, which goes to the cable identified as 2V NR (sensor #1313) as shown in your picture for the engine overview and highlighted as blue. However when I get signal from that point, my REV COUNTER shows to high information. Maybe because that sensor has as many pulses as each different crank position/sensor. So in that case, no matter I adjust my REV COUNTER to 0.5 pulse/rev or up to 6 pulse/rev, I get around 7800rpm when engine is in fact running at 950rpm.  In this case I got the signal from the ECU side directly on cable 32V GR, pins  B2 or B1.

- My REV COUNTER manual says to get the pulse from the negative side of the coil.  I tried to go them to the coil pack sensor/harness. I tried to connected to cable on the coil connector, but it is a sealed connector, so could not get a proper contact. I them tried in the ECU  cable  48V MR into connector with Pins  L3, M3, but I could not get a signal.  I was wondering if this section of the ECU which sends signal to the coild would be hi-voltage or not. So I didn't strip the wire to get a signal, because I didn't have a insulating tape to seal it back again.

Should I try the ECU signal for the coil pack in that case?[/quote]

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