01 Honda Accord EX P01739

Hey Guys,
I've got an 01 accord with a p01739 code. This seems to correlate to the 3rd clutch pressure switch. I disconnected the switch and checked for battery voltage from the BLU/WHT wire coming from pin # B24 to ground KOEO according to the snap on troubleshooter. I'm getting 5 volts. I then located the same wire at the PCM, and i still get 5 volts. Is this a 5v volt reference voltage and have I missed something? I'm including the wiring diagram snap on included with my software. Any help is greatly appreciated!

Thanks,
Elijah

Hi Eli.

It seems to be a 5v ref for an internal microcontroller unit (mcu) digital input pin.

When pressure switch is open, mcu receives 5v. When pressure switch is closed, mcu receives 0v.

It is ok if you read 5v when unplug switch or when there is not pressure.

Hi,
Does this mean I can back probe it and shift it into 3rd gear and I should get 0v? I'm confused because my verus said it was 12v in the troubleshooter. I appreciate your quick response.
Thanks,
Elijah

Hi Eli.

Yes. You should get 0v (if pressure switch is ok and also if you have pressure).

I have never seen 12v in a mcu digital input. They usually work in 5v level or 3.3v

There's a clue in the diagram, it shows a resistor internal to the control module on the control wire.
So it definitely won't be 12v.
You can't put all your faith in the Snap On troubleshooter. For as good as it is, It's got a good deal of misinformation