After dropping $300 in sensors and parts
I would rather be sure its the PCM before I waste anymore money!
I am unemployeed right now and should not be spending anything.

Napa doesnt stock the PCM either, so dealer prices no thank you lol

 

So wow, A bunch of codes here I just scanned. After reconnecting the PCM.
Let me add to that, I have had a dead battery for a while,
(14V battery no 14V charger). When I attempt to crank, I am using a jump box.

P0340 Camshaft Position Sensor 'A' Circuit Malfunction
P1493 RCNT Solenoid Circuit Malfunction
P0122 TPS Low Voltage

 

Could it be that my brand new Napa part has failed?
I am going to look it over right now

 

Getting 5V to the connector at the two outter most pins of the camPS connector
Are the two connector pins supposed to be seeing 5V or just one?

Also in the ASD relay #85 and #30 are seeing battery voltage at key on.
Are both pins supposed to be seeing battery voltage at key on?
Really starting to think its a PCM the more I find out

 

Correct me if I'm wrong,
But the 3 connector pins on the CamPS should be:

Sensor signal
Sensor ground
Sensor power - this being the only one that should be seeing 5V?

Why would I be seeing 5V at key on with two of the pins in the CamPS connector?

 

bump for info on above^ ?

 

found the splice for the ground for all sensors, this yeilding nothing useful to me.

dissconnected every sensor I could think of, was still getting 5V across the sensor ground circuit.
Starting to take apart the harness little by little.
If anyone has any idea where to look please let me know!

 

All your problems are probably the dead battery, and the wrong one at that. Automotive batteries should be 12V.

 

Charged up the battery, still no start issue.

(I am charging at 16.5v with a 14v system)

 

But the battery your using is 14v?

 

yup.. Just like how the OEM system is 12V and your alternator charges 14.5V.
2.5V is the maximum over is how to properly charge a battery without damaging it.

By the way I have since started a new thread with more detailed info on my issue:
https://www.cherokeeforum.com/f2/no-...-check-164789/

 

Power XS d1400 is the battery is anyone is interested lol

 

Just a few thoughts...a lead acid battery makes about 2.2 volts per cell. (that doesn't change except a little with temp). Fully charged rested at room temp with no drain, and no charging it will be 12.7 volts. (or supper close). If you have 6 cells, and 6 vents, its a 12 volt battery. Like pouring water into a cup, you gotta be a little higher to pour in, hence the 14ish + charging voltage. (Keeping one at 15+ will make it boil a bit more than you want).

That link cherokee posted DOES contain some pretty interesting stuff, (if all the original clips are still there, I didn't check...yet). They guy ends up on my third thought.

Take a really good look at the wires to your rear O2 sensor....or 2000, all of them includong the lower or whatever is "down-stream". They can short and just might elplain the odd voltage readings you have, the and codes. The powered 02 heater wire contacting the others is an issue as well an anything grounding. miny fuse 17? (16, check #16). does 2000 have that? Check all the fuses, and don't underestimate the mini's!

That said I haven't fully figured out my old Renix, and almost always regret getting involved in a newer Jeep issue!

 

OK, here a few down is "96 no start" (part one). Maybe not right on your mark, but interesting and maybe worth taking a minute to check out.

Btw, thank-you Laredo!

http://www.cherokeetech.com/VBull/sh...agnosis-Videos

 

Yea, well at the time I installed everything I was going for audio use. 320A Mechman alternator helped keep the wattage up with the higher voltage. And with the giant amperage my one amplifier was using it came in handy! But have since realized driving offroad is way more fun haha
Still have a good amount of audio stuff in here. Will probably turn down my charging voltage soon (adjustable external regulator) just because higher voltage screws alot up! lol Thinking it might of had something to do with my current no spark issue.
(maybe a PCM issue?)

I'm sorry ya lost me haha, what link?
I have numeous threads on a couple of forums right now looking for an answer

Funny you mention that, because the rear O2 (and many other sensors) share a common ground that is splice 111(115?) off the main harness.
I had thought about looking it over more carefully but never really put that to action. And I guess it would be a good idea.

Good luck with that! haha I am having a huge amount of trouble with my new"er" cherokee.
And I really appreciate anything you have to suggest