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Thread: 0411 PCM A/C Signal Check

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  1. December 9th, 2025 #1
    SuperStepside
    SuperStepside is offline
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    Default 0411 PCM A/C Signal Check

    Hi all, can anyone check to see what a/c request signal my tune has? I need a 12v analog signal request. The PCM isnt grounding the relay control wire(pin43) so I figure I might have the wrong a/c request signal setting. Im reading that you can change this in HPTuners/TunerCat but not Efilive. I have an 0411 PCM running a 6.0LQ4 with a 1270003 cos3 tune. Thanks
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