[Clusters]

Before you start testing on stuff like this it's important to have a proper wiring diagram and understanding of circuit design and operation.

Nissan throttle body wiring is all basically the same for the fly by wire and here are the 6 connections.

Power
Ground
Sensor1
Sensor2
Motor
Motor

Below is wiring for a different Nissan, the colors and pinouts may be different, but it's the same operation. 5V and Gnd are connected through the potentiometers so the ECU can verify the integrity of the circuits, if one fails or there is an open wire, it can detect the fault.

The wipers move on the sensors and return the voltage to the ECU on the sen1 and sen2 circuits. Most TPS are about 1V at closed throttle, and 4.5V at WOT.

The ECU compares both sensor values and if there is a discrepancy between the two, it will set a fault code and can go into limp mode. When testing the sensor signals, you should have the throttle body plugged in and backprobe the connector with a paperclip, ONLY backprobe one at a time to prevent short circuit and damage.

These are just the basics, but maybe with some understanding of circuit design and operation you might get somewhere instead of random meter readings.

Hope this helps