by SprinterTRD on Wed Oct 16, 2019 2:46 pm
You can control this several ways,
Leave the PPS computer there and use the ECU low-side driver output to mimic the speed sensor.
Remove the PPS computer,
W-R (pin2) is most likely constant +12V and W_G ( pin5 ) is PWM to ground. Use a ECU output to ground using PMW mode connected to W-G and +12V to W-G.
To determine what ECU output can be used.
With the PPS computer powered up, measure from pin 2 to ground to confirm the voltage at pin 2.
With the PPS removed, Measure across 2 and 5 to get the PPS solenoid resistance and work out the current using the previously measured voltage.
The reason for the strange voltage measurement is if you are using a multi meter, measuring voltage across that point at that given speed, a duty cycle PWM could look like a 4.8V signal due to the multi meter circuitry.