240_to_miata

iTrader: (2)

Hey guys,

I am having issues with my Datalog LED output.
The Output is @ INJ G , which comes out at the AC Fan output (pin 1a)

It is staying Solid no matter what. This used to work no problem, and I think it stopped working when I changed my INJ F output to VICS.

Here are my outputs:
Input- Water Low Level / Meth Failsafe*********MS3 Nitrousin- Pink- Pin 23 on DB37
input- datalog***********************************MS3 Datalog- AC Idle up input on stock harness
input- tableswitch*******************************MS3 Tableswitch- Grey- Pin 14 on DB37
output- boost************************************MS3 EBC Out- Dark Green- Pin 20 on DB37
Output- VICS************************************MS3 INJ F- AC Compresssor output on stock harness
Output- Meth Relay***************************** MS3 Nitrous 2- Orange- Pin 19 on DB37
Output- Meth Solenoid************************* MS3 FIdle- Blue- Pin 37 on DB37
Output- Warning LED**************************MS3 IAC1- Light Green- Pin 18 on DB37
Output- datalog LED **************************MS3 INJ G- AC Fan output on stock harness blu/grn pin1a

If I disconnect the output physically, the light goes off...so this is not a harness issue, its something within the megasquirt.

Any Ideas? Tune attached.

Savington

iTrader: (31)

What did Dimitris say when you emailed him?

240_to_miata

iTrader: (2)

I haven't bugged him yet. I'll email him now.

Dimitris, FYI this is

MS3 Basic SN 12511

Reverant

iTrader: (10)

InjF is connected internally to InjG with a diode, so that when InjF (A/C relay output) is triggered, the A/C fan output is also triggered.

In other words, if you disable VICS on InjF, you will get back the datalog LED on InjG.

Or you can remove diode D15, which is right behind the "FAN" 3-pin header.

240_to_miata

iTrader: (2)

That was easy. I figured the two were together somehow due to it originally being setup for AC.

I will remove the diode tomorrow.

Thanks!

240_to_miata

iTrader: (2)

I am blind and can't find d15. Can you point it out ??

Reverant

iTrader: (10)

It's under the white MS3 daughterboard.

240_to_miata

iTrader: (2)

Ok thanks. I'll remove the daughter board and try to carefully unsolder the diode. I'm a bit intimidated. It's Quite a nicer board than my ghetto old ms1 I hacked together.

240_to_miata

iTrader: (2)

Done and done. Thank you again for your amazing customer support. I had an answer before I even walked out of the garage. Ms3 is back up and running with all I/o working great!