BlueRidgeMark

I wouldn't be sure where to go either, with that mess!

Well, let's see if we can find any common denominators here:

P1694 JEEP Possible Causes What does this mean?

• CCD Bus (-) circuit open between Powertrain Control Module (PCM) and Transmission Control Module (TCM)
• CCD Bus (+) circuit open between PCM and TCM Transmission
• CCD bus wiring damaged
• Faulty TCM

Read more: https://www.autocodes.com/p1694_jeep.html


P0443 JEEP Possible Causes What does this mean?

• Faulty Evaporative Emission (EVAP) Purge Solenoid Control
• Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
• Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection

Read more: https://www.autocodes.com/p0443_jeep.html


P0118 JEEP Possible Causes What does this mean?

• Low engine coolant level
• Faulty Engine Coolant Temperature (ECT) sensor
• Faulty engine coolant thermostat
• Engine Coolant Temperature (ECT) sensor harness is open or shorted
• Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

Read more: https://www.autocodes.com/p0118_jeep.html


P0700 JEEP Possible Causes What does this mean?

• Shorted or open circuit within Transmission Control Module (TCM)
• Faulty Transmission Control Module (TCM)

Read more: https://www.autocodes.com/p0700_jeep.html


P1492 JEEP Possible Causes What does this mean?

• Faulty Battery Temperature Sensor
• Battery Temperature Sensor harness is open or shorted
• Battery Temperature Sensor circuit poor electrical connection

Read more: https://www.autocodes.com/p1492_jeep.html


Okay! Thinks are looking more clear now! When I first looked over that list of codes, I about choked. That is a huge mess and I had no clue what it meant or where to start.

It's time to eat that elephant! How do you eat an elephant? One bite at a time. Break it down. When a problem is huge and overwhelming, break it down to individual components, and do what you can with each one. With trouble codes, looking each one up, and listing them all out, is often very helpful. The more codes, the more you need to list each one separately, otherwise it all jumbles together in your mind.

As soon as I did that the common denominator became obvious. Wiring problems are listed for each one. Your original complaint was a wiring problem.. You "fixed" that by messing with the wring.

I'd be looking at your wiring. IF it were not for the blown fuse, I'd start to suspect the PCM itself, but the PCM isn't going to cause that blown fuse. A shorted wire is needed for that.

Where does all of this wiring come together? At the PCM. The first thing I would do is to get some CRC contact cleaner, and take a look at the PCM connector. (disconnect your battery first, of course!)


I"d start there. Then I would follow that wiring bundle from the PCM looking for wear points or pinch points. Look for heat damage. If I found any, I'd start unwrapping that harness to see what's in there.

Usually, with a conglomeration of electrical problems the first thing I would suggest is to check your grounds (see my sig, #1), but poor grounds don't blow fuses, either. (But it never hurts to clean up your grounds.)

X1997J

I'll have to start cleaning plugs and tracing wires I guess. It's just weird that before there were no codes then when the jeep starts it gives me 5 codes kinda all over the place.
It stopped blowing the fuse when I unplugged a gray harness near the engine oil and tranny oil dipstick (5 wires if I remember correctly). I plugged it back in and the fuse is holding.

X1997J

lawsoncl

Check the wiring next the exhaust manifold for heat damage. Also shake and wiggle the harness from the fuel injectors back to the firewall. Damage or a short there can pop fuses.

awg

Those codes could be caused just by unplugging...are you saying you have cleared them with your scanner, and they return immediately ?

dave1123

When going thru your harnesses, the CCD bus is a twisted pair of wires. You can check them easily that way.

X1997J

I will be sure to do this. Thank you for the tip!

X1997J

I have not cleared them at all maybe I should try and see if the codes come back. I am kinda nervous to take the jeep on any drive incase the fuse pops and I am stranded.

awg

yes, they dont clear, nor does the CEL normally turn off, once set. It should certainly narrow down the possibilities

all you can really do is jiggle the harnesses while it is hot, and try starting it repeatedly

X1997J

Hey everyone, thanks for all the help and replies. The jeep is still running but I have not yet found the short/problem. I'll update when I do find the issue. Just wanted to thank yall for the ideas and help.