[Sandstone]

Hi, welcome to the site.

Cleaning the ground eyelet and mount won't help if the wires are corroded under the crimp or insulation, the only thing you can do is cut off the old eyelet and add a new one. There's a few posts around on it.

Info on the engine bay grounds and what's connected to them here:

https://www.jeeppatriot.com/threads/engine-bay-grounds-g110-g111-and-g112-location-and-wiring-diagrams.341159/unread

You can also try here for more wiring info:

Repair and Diagnosis — 2008 Jeep Patriot 4WD L4-2.4L Service Manual | Operation CHARM

Detailed repair manual for the 2008 Jeep Patriot 4WD L4-2.4L.

charm.li

Also, if you could post the codes for us, it might help us come up with useful suggestions.

 

[Sandstone]

hi @Sandstone! Thanks for the quick reply and the website you linked to. This is going to be very helpful.

Sure, you're welcome!

The body wiring harness runs through the driver side wheel well behind the liner, sometimes the wire insulation rubs through causing the wires to corrode and break.

There's some more diagrams like this that might help you navigate the wiring harnesses here:

https://www.jeeppatriot.com/threads/wiring-harness-connector-and-component-location-diagrams.342288/#replies

 

[Sandstone]

Oh, and on the random stalling, sometimes this is caused by a failing crankshaft position sensor or the associated wiring and connector. Often times there's no code set.

 

[Sandstone]

Ok, sound good.

If you haven't already, you might try checking the PCM connectors, make sure there's no corrosion on the pins and the connectors are fully seated.

The main relay supplies power to part of the PCM so a recheck of the relay box and wiring might be helpful:

https://www.jeeppatriot.com/threads/random-power-loss-stall-starting-issues-2-4l-cvt-solved.338165/?post_id=1870647#post-1870647

I get the feeling that you've probably already done this, but if not, check the battery condition and the condition of the terminals (clean, tight, etc.).

Since you just replaced the TIPM, I'd think the cable from the battery to the TIPM would still be tight, but if it got loose it could cause random stalls.

 

[Sandstone]

If I do replace my PCM, does anyone know if it needs programmed..

Yes, the PCM will have to be flashed / programmed to your specific vehicle.
PCM vendors will usually ask for the VIN to do this.


Is this issue resolved, or can you still make it happen?

I then started wiggiling wires by the TIPM and on a specific harness when I wiggled it, the car would shut off.

I'm not sure where the replacement TIPM came from or if the part numbers matched exactly, but if it wasn't the same part number / configuration and/or wasn't verified to be in good working condition it could have introduced issues.



Since you've checked off the easier things, you may have to decide between taking a gamble on a PCM, or having a dealer or shop with an advanced scan tool do a diagnostic to see if they can narrow down what is causing the CANbus issues.

 

[Sandstone]

Thank you! I saw this yesterday that they ask for the VIN for programming. I thought I was going to have to take it in to have it programmed.


The issue with the vehicle shutting off wile wiggling wires was resolved with the new TIPM.

Even though I couldn't see any issues with the relay box, I rewired the whole this yesterday since the symptoms seems to be the main relay. I am going to see if the issue of it stalling comes back.

So the U0100 code is still present but I am wondering if that might do away after a little driving if the issue doesn't come back.

If not, I zm not really sure what to do other than take it in like you mentioned.

Maybe a reach here, but if you haven't already you could try resetting / re-syncing the system by disconnecting the battery cables, touching them together for 10 min or so, then reconnect.

 

[Sandstone]

I haven't done this... I didn't know that rest the system. I will try it!

Sounds good, let us know!

If you have trouble getting the cables to touch you can use one lead of a pair of jumper cables, or a piece of wire, etc. to electrically connect them, just make sure you don't short out against the battery terminals.

 

[Sandstone]

You're welcome, and thanks for the update!