A/C Compressor activation on P59

They go by many names, P01, P59, VPW, '0411 etc . Circa 1999 to 2006. All VPW OBD2 PCMs.
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Re: A/C Compressor activation on P59

Postby Gampy » Thu Feb 11, 2021 5:11 am

What xdf ??

Is it locked ??
Try to View/Edit XDF Header Info.
Windows 10 is like an off idle flat spot ... It stumbles when it's time to go!

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Re: A/C Compressor activation on P59

Postby rocketmench » Thu Feb 11, 2021 5:59 am

Well I just realized the missing parameters were under the un-expanded "AC" tab in the fans parameter list. Didn't even notice that till just now! Obviously a newbie here. As for which xdf, I'm not sure how to answer that. I was given the xdf from a member at gearhead-efi who indicated it had the AC fan controls. And so it does. So now I should be able to confirm fan operation in my bench-top testing.

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Re: A/C Compressor activation on P59

Postby ShorTuning » Fri Feb 19, 2021 5:27 pm

This all makes perfect sense. Now I need to inspect the boards for the tach output. None that I know of have the 12v pullup built on the board any longer. Parameter to select pull-up is in the software but no hardware to make that work. For swaps that require that I usually wire a 1k resistor between B19 and the tach output to get the pullup to work.


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