novice ha. been there and in fact never even used what you have there. so I'm no help on working that tool. but i say pick up a cps and swap it out as as a newb myself that what someone told me to do so i learned about the factory external torxs 10m bolts that bolted on the crank positioning sensor to the 11 o clock position on the back side of the engine where you could use 28.5" extension on a rachet and slowly turning counterclockwise to get the bolt to pop with release and you swap these bolts out a standard bolt head type and install a $30-$50 Cps that are known to be common failures amongst the 87-96 era xjs and mjs, so the idea being as a newb you are just hoping and swapping parts that it might fix your jeep, being a costly expense if it in turn doesn't fix said problem. now however in my 14years experience learned i did not waste money buying a cps as i have a few times swap out the cps as i have been stranded like you in the middle of the trails of nowhere . so a safe bet as good spare. however with electrical gremlins still found in our MJs it is best to learn how to use the muti-meter tool for it is only to our advantage. i will do so with you now. i wanna say it has the volts be.5 seems legit.