No RPM testing MSII

Ask questions about DIY board assembly issues, fault finding and testing. (Covers all Megasquirt versions and board.)

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Matt Cramer
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Re: No RPM testing MSII

Post by Matt Cramer »

Please post a tooth log now that you have MS2/Extra installed.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Matt Cramer wrote:Please post a tooth log now that you have MS2/Extra installed.
Ok I found the instructions to do a tooth log. I will do that tonight and post the results. Thank you.
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Unfortunately I am at a loss. I tried to do a tooth log but there is no reaction to the throttle pots so it can not produce a log? Not sure what to try next?
Matt Cramer
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Re: No RPM testing MSII

Post by Matt Cramer »

Throttle pots have no bearing on the tooth logger.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Matt Cramer wrote:Throttle pots have no bearing on the tooth logger.
OK I can attach the log when I get home tonight. I didn't bother because when I click start and stop it says "empty file". I assume there won't be anything for you to look at?
Matt Cramer
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Re: No RPM testing MSII

Post by Matt Cramer »

In that case, there won't be anything there.

Can you check if the signal from the opto circuit is making it to pin 14 of the U1 socket with a volt meter?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Matt Cramer wrote:In that case, there won't be anything there.

Can you check if the signal from the opto circuit is making it to pin 14 of the U1 socket with a volt meter?
I will do that. Thank you for all the help and patients.
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Voltage at pin 14 is 5V with Stim turned on.
Matt Cramer
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Re: No RPM testing MSII

Post by Matt Cramer »

yesitis wrote:Voltage at pin 14 is 5V with Stim turned on.
If you apply 12 volts to TachSelect, does this voltage drop to zero?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
yesitis
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Joined: Thu Dec 06, 2012 6:53 am

Re: No RPM testing MSII

Post by yesitis »

Matt Cramer wrote:
yesitis wrote:Voltage at pin 14 is 5V with Stim turned on.
If you apply 12 volts to TachSelect, does this voltage drop to zero?
I will try that. I am guessing that I connect the negative from the 12V battery to the heat sink and Pos to the TachSelect jumper?
yesitis
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Re: No RPM testing MSII

Post by yesitis »

OK I did the test and the voltage at pin 14 drops to zero. Is that good?
Matt Cramer
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Re: No RPM testing MSII

Post by Matt Cramer »

Yes, it means the circuit is working.

The bad news is you may have a faulty daughter card. These have a one year warranty; you'd want to contact the seller directly.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
yesitis
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Re: No RPM testing MSII

Post by yesitis »

I purchased it from DYI AutoTune but it was more than a year ago so even though I am just building it now I'll have to buy one. Thanks for all your help.
yesitis
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Re: No RPM testing MSII

Post by yesitis »

yesitis wrote:I purchased it from DYI AutoTune but it was more than a year ago so even though I am just building it now I'll have to buy one. Thanks for all your help.
Ouch! I just looked at the price $129.00. That's an expensive lesson.
yesitis
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Re: No RPM testing MSII

Post by yesitis »

Well I got the new Daughter card and with it plugged in the board it will not connect to TS? If I plug in the original board in it connects to TS fine? Did I get a second bad card? Help!
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Re: No RPM testing MSII

Post by jsmcortina »

yesitis wrote:Well I got the new Daughter card and with it plugged in the board it will not connect to TS? If I plug in the original board in it connects to TS fine? Did I get a second bad card? Help!
Have you loaded firmware to it? That's required.

James
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yesitis
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Re: No RPM testing MSII

Post by yesitis »

jsmcortina wrote:
yesitis wrote:Well I got the new Daughter card and with it plugged in the board it will not connect to TS? If I plug in the original board in it connects to TS fine? Did I get a second bad card? Help!
Have you loaded firmware to it? That's required.

James
No I have not thank you I will do that.
yesitis
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Re: No RPM testing MSII

Post by yesitis »

I put MS2 firmware on the daughter board and it does exactly the same thing as the last daughter card. No reaction to the RPM pots? All the other pots show a reaction when I turn them. Also the only LED that lights on the JimStim is the power LED. Is that correct? Thanks.
racingmini_mtl
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Re: No RPM testing MSII

Post by racingmini_mtl »

Check that there is not a problem with the JimStim: http://www.jbperf.com/JimStim/JimStim_v ... ml#testing. And then make sure you have adjusted the pots correctly on your MS board (assuming you are using the VR circuit).

Jean
jbperf.com Main site . . . . . . . . . . . . . . . . . . . . . . jbperf.com Forum
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yesitis
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Re: No RPM testing MSII

Post by yesitis »

racingmini_mtl wrote:Check that there is not a problem with the JimStim: http://www.jbperf.com/JimStim/JimStim_v ... ml#testing. And then make sure you have adjusted the pots correctly on your MS board (assuming you are using the VR circuit).

Jean
I am set up for Hall effect and I thought I read to leave all the DIP switched off for Hall effect?
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