D14 not flashing.

[107merc]

On the JimStim, ign1 and ign2 LED's alternate and flash in synch with the RPM set by the pot. and signal shows in Tuner Studio
on pulse width gauges. However D14 on the M/S does not flash which according to the manual it should.
T/S is set for alternating. Any info appreciated.

[slow_hemi6]

How did you build it? or get it set up? if it was logic outputs then you could have a faulty or incorrectly installed component in the led circuit and the spark out still function. It is just a led, resistor and transistor to check. Schematics are in the manuals.

[elmanre]

Bro same thing happened to me, check Q6, is very tricky to solder those transistors, they are really small, check that there is not a short and that they have good contact with the PCB, also try to go un tuner studio and test the LED and check the voltage at the output of D14 ( I guess you have wasted spark or 2 logic outputs)

[107merc]

There is 5V on one side of the LED, it is looking for the same ground that turns on the ign lamps on the J/S.
Hoped I had just missed a jumper requirement.

[107merc]

So after further checking, we have ascertained that pin 39 and 40 of the U1, inj1 and inj2 leads, are going on/off
ground but pin 7, the "squirt" lead to the D14 circuit not only does not alternate voltage but my multi-meter
only shows .003V, not enough, I don't think, to switch Q6 on that controls D14. Hopefully someone
will come up with something I forgot or I'm in big trouble. Any info appreciated.

[racingmini_mtl]

Have you tried using the test mode to see if that voltage changes when you change the output from off to on?

Jean

[107merc]

I thought that's what the JimStim was doing, alternating the pulses to inj1 and inj2
through pins 39 and 40 of U1 and D14 through pin7 or am I misreading the manual??
Thanks.

[elmanre]

Try to check it without jimstim first.

Go to tunerstudio, test mode I/O and start checking your ignition outputs, and check the voltage at the pins and LED.

[107merc]

OK, I'll leave the J/S turned off and connect 12V to pin 28 of the M/S. Should I use sensor or block ground pin for the other side??
Should state the M/S is on a test stand not in the car.

[elmanre]

OK, I'll leave the J/S turned off and connect 12V to pin 28 of the M/S. Should I use sensor or block ground pin for the other side??
Should state the M/S is on a test stand not in the car.

You can use PIN 19 for ground.

[racingmini_mtl]

The issue is not the JimStim connection. If you have power with the JimStim, you're fine for now as it has nothing to do with the LED14 working or not. So power your unit, set the RPM to 0 and use the I/O test to check that the LED14 output works or not: http://www.msextra.com/doc/pdf/html/Meg ... 4-172.html

Jean

[107merc]

Thanks Jean that was the answer. Was thrown off by the statement in the manual that "The Megasquirt controller LED will flash synchronously
with the Stimulator Injector LED's" Quick question, D14 is much brighter than D15 or 16, is that significant?? Thanks again.

ADD: just realized that the manual section I quoted was NOT for the JimStim but V2.1 stimulator. Sorry to take up everyone' s time.

[elmanre]

Thanks Jean that was the answer. Was thrown off by the statement in the manual that "The Megasquirt controller LED will flash synchronously
with the Stimulator Injector LED's" Quick question, D14 is much brighter than D15 or 16, is that significant?? Thanks again.

ADD: just realized that the manual section I quoted was NOT for the JimStim but V2.1 stimulator. Sorry to take up everyone' s time.

You should check voltages with a tester on the LED's