7747 and wideband LM2
#1
7747 and wideband LM2
Need some help. I have a 7747 ecu and am trying to use a innovative LM2 wideband o2 controller on it. I got the TPS, and MAP signals to log and view fine, but cannot get the RPM output to read on the LM2. I have tried several places to get an RPM signal (coil, control module, injector). I would like to run it off of the TACH signal from the ecu. does anyone know which pin on the ecu runs a tach signal??
#2
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Re: 7747 and wideband LM2
Need some help. I have a 7747 ecu and am trying to use a innovative LM2 wideband o2 controller on it. I got the TPS, and MAP signals to log and view fine, but cannot get the RPM output to read on the LM2. I have tried several places to get an RPM signal (coil, control module, injector). I would like to run it off of the TACH signal from the ecu. does anyone know which pin on the ecu runs a tach signal??
RBob.
#3
Re: 7747 and wideband LM2
That was my worry this was the only tach signal. I have tried it and cannot get the lm2 to read off of it. When i view the output of this wire on an oscilloscope the wave form is very ugly, common from a coil output, very large voltage spike and lots of ringing. I was hoping for a 5v square wave or 12 volt signal from the ecu i could use. I guess the closest i can get to this is the injector signal???
#4
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Join Date: Mar 2002
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Received 215 Likes
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201 Posts
Car: check
Engine: check
Transmission: check
Re: 7747 and wideband LM2
That was my worry this was the only tach signal. I have tried it and cannot get the lm2 to read off of it. When i view the output of this wire on an oscilloscope the wave form is very ugly, common from a coil output, very large voltage spike and lots of ringing. I was hoping for a 5v square wave or 12 volt signal from the ecu i could use. I guess the closest i can get to this is the injector signal???
RBob.
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