Saturn and the bypass signal

chrispel · Post by **chrispel** » Thu Aug 17, 2006 1:26 pm

bluetrepidation wrote:
chrispel wrote:Teb I'm going to be ditching the PCM once the add on board comes out so I can drive my stock gauges thats why I need the ms configured to run the bypass.
Follow this to setup the physical circuit: http://megasquirt.sourceforge.net/extra ... gmdis.html

The generic port settings are easy enough to figure out. Just let it kick the output on after the engine hits 400 RPM.

A.J.

That is for the MS1 V2.2 I thought? I did that mod to my last MS. SO should I do this same mod and hook the output of the led to the spare output I have for pin 3?

bluetrepidation · Post by **bluetrepidation** » Thu Aug 17, 2006 2:00 pm

chrispel wrote:
bluetrepidation wrote:
chrispel wrote:Teb I'm going to be ditching the PCM once the add on board comes out so I can drive my stock gauges thats why I need the ms configured to run the bypass.
Follow this to setup the physical circuit: http://megasquirt.sourceforge.net/extra ... gmdis.html

The generic port settings are easy enough to figure out. Just let it kick the output on after the engine hits 400 RPM.

A.J.
That is for the MS1 V2.2 I thought? I did that mod to my last MS. SO should I do this same mod and hook the output of the led to the spare output I have for pin 3?

It is for the MS1 V2.2 but also works for the MS2 V3. The layout of the V3 is a little different as you can see in the pic but you hook it up in the same fashion. Follow the schematic not the pic. Just remember the signal is inverted when you hook the output up like this. The LED will be on when the output is off. This confused me at first. Settings would be:

Enable the port for the LED you used.
RPM < Thresh 400 Hys 1
No second condition.
Port on value 0
Triggered value 1

That's about it,
A.J.