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How to datalog when the A/C clutch cycles

Old Sep 4, 2022 | 03:32 PM
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Default How to datalog when the A/C clutch cycles

I'm trying to troubleshoot an A/C problem and would like to be able to datalog when the A/C clutch engages and disengages, any help would be greatly appreciated. My A/C blows cold at idle but doesn't work well while driving.
Old Sep 4, 2022 | 04:13 PM
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Originally Posted by Jerryg
I'm trying to troubleshoot an A/C problem and would like to be able to datalog when the A/C clutch engages and disengages, any help would be greatly appreciated. My A/C blows cold at idle but doesn't work well while driving.
First thing to check is that there is no warm air coming in through the vent.
Old Sep 4, 2022 | 05:37 PM
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Look at the documentation for the MS that you have (if you have a MS). It will be titled something like this: Megasquirt3_TunerStudio Lite Reference Guide. Available from MSEXTRA.com.

Find the Status Info, like this:



In this case, AC is called for when Status 7 = 32 (or some combination of, say 33 = 32 + 1 if you have more than one thing at a time). Thus, you would log Status 7 and look for when it jumps to 32 or higher.

DNM
Old Sep 4, 2022 | 06:14 PM
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Originally Posted by DNMakinson
Look at the documentation for the MS that you have (if you have a MS). It will be titled something like this: Megasquirt3_TunerStudio Lite Reference Guide. Available from MSEXTRA.com.

Find the Status Info, like this:



In this case, AC is called for when Status 7 = 32 (or some combination of, say 33 = 32 + 1 if you have more than one thing at a time). Thus, you would log Status 7 and look for when it jumps to 32 or higher.

DNM
that worked thanks!
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