First of all thanks for taking the time to read. The details: TPS signal wire ORG/DK BLU or center wire on the TPS plug reads 5.6v unplugged from sensor, reference wire reads 5.2v and the ground is ok. I checked for continuity between the 2 and they're good. I then back probed the computer side of the harness and got the same reading. I unplugged the TCM same thing, I also unplugged Temp sensor IAC and MAF with no change. For context: When I bought the Jeep several years ago it had a code for IAC(I changed it) the code is still there and I also had a code for Air bag which went away several months ago and my horn quit working. I don't know exactly where in the timeline because I had been letting my daughter use it. Ai suggested it was the PCM so I ordered one and no change. My next move was going to run a wire from the PCM to the sensor eliminating the signal wire from the harness and see if that would change anything. But before I hack up my wire harness I was hoping someone smarter than me had a better idea or approved of my idea. I'm not sure what all the the signal wire connects to. Again thanks for reading!

 

What year and motor size?

 

1997 xj 4.0 4wd

 

I have since "overlayed" a wire between the PCM and TPS no change, I removed the wire altogether and added my own wire from the PCM to TPS the only thing that changed was I couldn't read the TPS % from the scan tool. If it was me that had to drive it I would just unplug the TPS because it runs ok without it but i'm not putting my daughter in it like that. Thanks.

 

Theres a thread on NAXJA where they were talking about a problem someone had, and apparently the clock spring can short out causing TPS issues. Maybe try unplugging your horn fuse and see if it changes anything.
https://naxja.org/threads/went-in-ru...post-246798808