AntonUK
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| posted on 23/6/15 at 08:55 PM |
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Tacho Output on MSExtra 2
Hi All.
I'm running a megasquirt v2 on a v3 board with the MS extra firmware.
I've just hooked up IAC1A to the rev counter and set the relevant output on tuner studio. I cannot run the engine atm, is there a way to test
the output without the engine?
I've tried the coil test mode but nothing happens with the tacho, not sure if it should?
Anyone tried it?
Build Photos Here
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dave_424
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| posted on 23/6/15 at 09:01 PM |
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Not tried to test it, but that's the exact setup I use to drive my ZX9 clocks, works a treat
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ali2992
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| posted on 24/6/15 at 04:31 PM |
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I have same problem, I'm not sure if this is how you do it but if you go on "can/bus test mode" or something like that, at the top
right of tuner studio you can then test/pulse the tacho output. However I'm only assuming here, all I've noticed when doing it for mine is
an increase in the voltage output for my tacho output. I'd be expecting the voltage to pulsing on the multimeter to simulate engine revving? Or
is it too fast for the multimeter?
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dave_424
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| posted on 24/6/15 at 07:00 PM |
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From what I've read, when a multimeter reads fast pulses it interpretes it as a voltage. E. G. 12v pulsed at a fast 50% duty cycle can be seen
as 6 volts
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ali2992
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| posted on 24/6/15 at 07:04 PM |
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Ah, thank you! That makes sense now with my readings
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AntonUK
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| posted on 28/6/15 at 05:41 PM |
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Thanks All, Didn't find the CAN options but will have another look.
In the end I just got on with getting the engine running and tested it properly. Works perfect 
Build Photos Here
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