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5sfeturbo.com
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Discussion Starter #1
Hi guys,

What are the pins for TPS and RPM on a 91 ecu?

I've looked, but all the pinout diagrams are kind of cryptic. Does anyone have a diagram with the pinout acronyms explained?


Thanks
 

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5sfeturbo.com
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Discussion Starter #5
Hey one question. What is the difference between rpm1 and rpm2. I need to get low voltage rpm signal.

Thanks
 

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5sfect20b said:
Hey one question. What is the difference between rpm1 and rpm2. I need to get low voltage rpm signal.

Thanks
I am not sure. I think there are just two rpm signals.
I used the RPM 1 wire and everything worked fine.

Perhaps someone else could confirm the dual RPM signal wire purpose?
 

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5sfeturbo.com
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2,750 Posts
Discussion Starter #7
MISTER2 said:
I am not sure. I think there are just two rpm signals.
I used the RPM 1 wire and everything worked fine.

Perhaps someone else could confirm the dual RPM signal wire purpose?

Just curious, what were you wiring in?
 

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5sfect20b said:
Just curious, what were you wiring in?
An SAFC...then I later removed the SAFC and used the same wire for an RPM signal for the data logging ability of my Nexus gauges.
 

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5sfeturbo.com
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Discussion Starter #9
MISTER2 said:
An SAFC...then I later removed the SAFC and used the same wire for an RPM signal for the data logging ability of my Nexus gauges.

Cool. I'm wiring a wideband that logs boost,rpm,egt,and off course a/f ratios.


It will be nice to see what the rom tune is doing as boost goes up :)
 

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5sfeturbo.com
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Discussion Starter #10
Hi guys,
Before I hack away, can anyone validate which rpm pin I should be using. Looking for a low voltage rpm pin.


Thanks in advance.
 

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MR2-less
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9,855 Posts
5sfect20b said:
Hi guys,
Before I hack away, can anyone validate which rpm pin I should be using. Looking for a low voltage rpm pin.


Thanks in advance.
Sorry for bringing up an old thread but I see this question never got answered so.......what is the difference between RPM 1 and RPM 2? Can anyone verify that an RPM signal for datalogging can be taken from either?
 

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5sfeturbo.com
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Discussion Starter #12
Yes. I hooked it up to my zeitronix wideband to get rpm signal. Below is an image of my setup(91 3SGTE):
 
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