pcm tune for pin 34 questions 4l60

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03-05-2013, 09:34 PM

Z284U2TRY

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pcm tune for pin 34 questions 4l60

The pcm is programed for pin 34 to control the shifting of a 4l60.

How do I set up the pin 34 to control the trans?

The harness has the trans range sensor still in it. I was going to remove this and only keep the white pin 34.

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03-05-2013, 10:03 PM

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Cavity 34 is simply a ground signal to let the pcm know if you are in park or neutral.

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03-06-2013, 09:02 AM

Z284U2TRY

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Are you saying pin 34 just goes to ground in park/neutral and is open in drive?

I know pin 33 will be on a brake pedal switch with constant 12v when brake is not in use and 12v broken when brake applied.

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