testing the 2wire PWM idle valve.

http://jbperf.com/JimStim/index.html
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107merc
Posts: 22
Joined: Fri Mar 28, 2014 1:56 pm

testing the 2wire PWM idle valve.

Post by 107merc » Wed May 31, 2017 6:50 pm

Is there a way to use the J/S to test the idle valve?? A detailed hookup would be much appreciated.
Thanks.

BobbieHul
Posts: 1
Joined: Tue Mar 19, 2019 5:50 am

Re: testing the 2wire PWM idle valve.

Post by BobbieHul » Wed Mar 20, 2019 8:53 am

I'd like to test the idle valve as well. By the lack of responses, I take it that's not possible?

jbelanger
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Location: Quebec, Canada
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Re: testing the 2wire PWM idle valve.

Post by jbelanger » Wed Mar 20, 2019 2:39 pm

The JimStim is not designed to be used with high current devices. The traces could handle a reasonable current without issue but there are other components on many of the I/O pins from the MS. On the outputs where there are LEDs, these are powered from 5V and I don't think they are rated for a 12V reverse voltage (I don't know the actual components used in all the kits).

So if you use a relay for an on/off valve or a SSR for a PWM valve then that would likely work. If you want to directly connect a 12V device to the JimStim, you might need to remove some component or risk some failure. And note that a failure on the JimStim could have an impact on the MS because the MS 5V supply is used on the JimStim.

Jean
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dontz125
Posts: 200
Joined: Mon Feb 22, 2010 10:27 pm

Re: testing the 2wire PWM idle valve.

Post by dontz125 » Thu Mar 21, 2019 9:37 pm

A short from 12v to 5v on the JimStim could have 'unintended consequences' to the MS processor!

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