Microsquirt RPM not reading with coil

Forum for discussing how to install MicroSquirt(TM), choose and troubleshoot sensors, wiring, and communications for MicroSquirt (TM) and MicroSquirt Module(TM).
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dontz125
Master Squirter
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Re: Microsquirt RPM not reading with coil

Post by dontz125 »

Which manual was this? The EDIS section in the uS manual says to use the OPTOIN+ (AMP 30) for PIP, OPTOIN- (AMP 31) to the EDIS module ground location, and IGNOUT (AMP 12) for the SAW signal to the EDIS module.
Shock_Strauss
MegaSquirt Newbie
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Joined: Sun Jul 28, 2013 9:20 am

Re: Microsquirt RPM not reading with coil

Post by Shock_Strauss »

I noticed I was using a writeup for msextra... I followed the link you sent me but now there's no rpm signal. I don't have to jumper anything correct? Thats only for Megasquirt not uS? Also, I found this document http://www.useasydocs.com/theory/vr.htm. Do I follow the table near the bottom for Hall or Opto input?
dontz125
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Re: Microsquirt RPM not reading with coil

Post by dontz125 »

Ah - there we go. I *knew* I had seen an updated write-up on the uS inputs ...

The EDIS page says to connect the PIP signal to OPTOIN+, and the new input page says to connect VR+ to Vref when using the OPTO circuit. Try that, see what happens ...
Shock_Strauss
MegaSquirt Newbie
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Joined: Sun Jul 28, 2013 9:20 am

Re: Microsquirt RPM not reading with coil

Post by Shock_Strauss »

Nope, still nothing. I connected it to vref then tried +12 like it said. What's strange is why is it getting RPM when I connect vr - to the pip signal...
dontz125
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Re: Microsquirt RPM not reading with coil

Post by dontz125 »

Like the man said, "Whatever works, baby, whatever works!" :lol:
Shock_Strauss
MegaSquirt Newbie
Posts: 16
Joined: Sun Jul 28, 2013 9:20 am

Re: Microsquirt RPM not reading with coil

Post by Shock_Strauss »

So, since I could only get a signal by following the msextra write up, I went ahead and installed it on my uS. I'm getting a crank signal and the injectors are firing beautifully! :yeah!: Thanks for helping me out dontz125!
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