AC compressor does not engage

This is the fan control side of the system. I marked the pins for the sensor on the PCM. The reading you get on the green wire at the sensor should be the same at
pin 16 in connector A. You already verified the power and ground. On the other pins.

The way the fans are supposed to operate is somewhat simple.
When you turn on the AC the control head sends a signal to the PCM asking for AC. The PCM activates the clutch relay. This section seems to work as the clutch engages. Now the same signal comes in on circuit A at the top left of this diagram.

It's on this section that controls the fans that there is a problem.
All of the relays are 12 volt with ground side control by the PCM and they all carry 12 volts to the fans or other relays.

I believe you said that the engine cooling fan still comes on but that the AC fan(s) don't correct?
In that case the blower motor relay is OK. The radiator fan diode and relay are working as are ECT 1 and 2.

Check fuses 15 and 6, those power the AC fan and relay.
Check that the fan control relay is the correct one, it has a blocking diode inside that could have failed. It will be a 5 pin relay. The other 4 are 4 pin.

Fuse 15 gets power through fuse 11 and a control relay. Fuse 11 and that relay have to be working though. Without them the car wouldn't start and run as they also activate the Air Fuel meter and part of the EVAP system.

But it's very possible the fuse contact(s) for fuse 15 failed. Pull the fuse and test right at the terminals in the box. Key on engine running one should have 12 volts. That is the side from the relay. If you have voltage there see if the contact is loose weak. If you get nothing you can try the test I have below.

Take a piece of wire with a 7.5 amp fuse inline and jump 12 volts from the battery to one terminal at a time of fuse 15 with the engine on and the AC on. If the fan(s) start working you have found the problem.

There are a couple ways to repair this if it turns out to be the problem. One would be to add on a relay. The other is to replace the fuse box.
Lets see what the testing shows first.