Help with adding Jbperf v2.1 board to 3.57 ms3 for vss

[Imdominant]

What i have is a ms3 v3.57 main board with ms3x add on. it is running a 5.3l ls engine in full sequential with cop using the factory cam and crank sensors. I am looking to be able to monitor wheel speed (via a built in abs wheel speed/ 2 wire sensor), and driveshaft speed. I have purchased the jbperf v2.1 dual vr conditioner board (internal) and i need someone to tell me specifically where i should connect the V+ (5v source), the GND , and above all where specifically do i connect the OUT1 and OUT2.. I assume i can leave the cam and crank signals alone because the engine now runs great , and i do not wish to disturb those circuits in any way!!

FYI, i am going to run new shielded wires into the case to each of the two sensors , so i have that part handled. Help with the 5V,GND,OUT1 & OUT2 are what i am unsure of. Any and all help will be greatly appreciated!!

[Imdominant]

Also, can i connect the OUT1 & OUT2 as to not lose any of my input options that are built into the external harness? From what i understand both outputs are 0-5v square wave btw

[dontz125]

On the main board between the DIP40 and the DB15, just under the BOOT header, you'll find the +5v and GND pads. There are several inputs on the DIP40 that can take a digit VSS signal - ADC7, ADC6, PE0, PE1, JS10, & JS11.

[Imdominant]

OK, thanks!

To be specific, lets say i attach OUT1 from the jbperf v2.1 board to JS5(ADC6) and attach OUT2 to JS4(ADC7) , and of course 5v to the 5v pad on the main board and gnd to the gnd pad on the main board... since the jbperf v2.1 outputs a 0-5v square wave signal (on both OUT1&OUT2) that should be all i have to do and it should work??? i wont lose any of the default functions of the ms3/ms3x? i just want to make final sure before i do it.

[dontz125]

That's it - sometimes it's easy!

[Imdominant]

OK i did it and first problem im having is since i set VSS1 as analog (adc6) , i dont have any selection that tells it the number of teeth obviously its only working off of 0-5v... well, my "vehicle speed" in TS is at its maximum (5v) value which happens to be 150 mph.

How can i invert this? reverse the polarity of the wheel sensor?

also it appears to be jumping around a lot. granted im spinning the wheel by hand but its no where near stable..

additionally, what happens if the analog input exceeds the 0-5v??

[racingmini_mtl]

The board output is not analog so don't select that option; you need to select 'Digital' and the correct digital input. And the output from the board will never exceed 0-5V.

Jean

[dontz125]

Set the "Input type" to 'Digital'; as you noted, the MS3 input is receiving a chain of 0-5v square pulses. What the MS3 is now considering is the number of pulses per second; when you enter the number of teeth on the tone ring and the OD of the wheel, it does the math and comes up with the speed.

A 0-5v signal will never exceed 5v, unless something goes seriously wrong ...

[Imdominant]

Ahh, well based on the advice given i put both OUT1 and OUT2 to, ADC6(js5) and ADC7(js4) respectively. those are analog inputs exclusively, yes? Ive tried selecting digital and these are not a selection...

[racingmini_mtl]

Ahh, well based on the advice given i put both OUT1 and OUT2 to, ADC6(js5) and ADC7(js4) respectively. those are analog inputs exclusively, yes? Ive tried selecting digital and these are not a selection...

I'm not sure if that was always the case but they definitely are available as digital inputs ('JS5 (ADC6)' and 'JS4 (ADC7)') in the latest firmware version (1.4.0).

Jean

[Imdominant]

OH ok i see that now. moved it to digital and tried it, its working on vss1... thanks for the help guys!! ill check back in after i take it down the road , hopefully tomorrow

[dontz125]

Set "VSS1 Input Type" to 'Digital'. Under "Digital Input", select 'JS5 (ADC6)'. Like Jean said, the ADCs will quite happily deal with digital inputs.