I can't attest to JScan or Alfa OBD, but I used the AEV ProcalSnap to change my TPMS. I am not very mechanically inclined and it was fairly simple to do. With a '22 you shouldn't need to worry about getting the right model (with a '23 I had to make sure it was a "BF" model, as "BE" would not work).
ProcalSnap will only do three things, change TPMS setting, change tire size, and change axle ratio.
It is pretty simple to install and operate (they have instructions on their site and there are some good videos on Youtube as well):
- Pop out the OBDII connector from its holder (there are clasps on each side, my clasps were on the dashboard side and not on the floorboard side so I had to kind of reach in from below)
- Pop out the pin locks from the OBDII (this was the most difficult part for me, as those gray pin locks were stubborn, I used a very small screw driver to push the pins down and finally got it to pop out)
- Insert the bypass pins (they give this to you) in the correct ports on the OBDII
- Put the OBDII back in place
- Insert the other end of the bypass into the correct green star connector (I had to pop out the panel for the light controls to reach inside the dash, but it was pretty simple to pop out)
Once installed, it is very simple to use (again, they have instructions printed for this as well). You first pair it with your truck (which will make it forever linked to your truck) by pressing the ignition twice to "Run", then plugging in the Snap. You then press and hold the brake pedal and the cruise control on/off button. The horn honks three times and you are now paired.
To change TPMS, you put the radio on AM, then go to the equalizer and change the Bass, Mid, Treb to the values you want (for me it was 0 3 5) and do another set of Brake press + one of the buttons for the cruise control (the buttons are different for changing TPMS, tire size, and axle ratio, it will tell you in the instructions).
Again, for me, the most time consuming part was trying to get the gray pin locks out of the OBDII, other than that it was pretty quick.