Got a 2014 GC Limited 4x4. Yesterday morning the wife went to leave the house and when she started it up the mode selector lit up all the modes(auto, snow, sand, rock & mud) the 4wd low light was lit as well as the steep grade assist, traction control light was blinking on dash. When I got home I hooked a snap on modus edge to it and it read out U0102-00 (transmission control module lost communication with transfer case). Has anyone delt with this before. It’s got 60k miles on it and stealership said it won’t be covered under any warranty. Thanks!
2014 Grand Cherokee Transmission Problem
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06cummins5.9
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Just looked at the data and waited on it to fix itself and it finally did. Switched it to snow mode. Data says “Terrain Switch Position Request - Snow”
“T-Case Status - Auto”
Transfer case will not change to different modes no mater if the engine is running or not
“T-Case Status - Auto”
Transfer case will not change to different modes no mater if the engine is running or not
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23,770 Posts
The Transfercase doesn't know the terrain modes, just the position of its shift rail, which is either auto or 4Low or neutral. It will never match the terrain switch position. The DriveTrain control computer takes inputs from the switch and other modules and runs the transfer case motor how it sees fit. Try 4 low and see if the transfer case reports a 4Low mode.
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So I got home. Started the Jeep GC. Waited on it to start working. Once it did. I put it into 4wd low. It went in like it should. Cycled PRND and back to park. Took it out of 4wd low. When it came out it started grinding gears. Now when I shift it to any gear it is a hard shift. Much harder than before I did the 4wd low cycle
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Did the 4wd low cycle again. Whole lot of popping going on when shifting in and out of 4wd low
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Are you saying the auto transmission is shifting with a clunk?
Depending how and when you shifted from 4wd low to normal, you could get some gear noise and clunking, but that should stop once you drive a little.
You probably need to have someone look at the transfer case.
Depending how and when you shifted from 4wd low to normal, you could get some gear noise and clunking, but that should stop once you drive a little.
You probably need to have someone look at the transfer case.
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Yes I was still in auto mode on my terrain selector. I know it locked into 4wd low cause I let it roll a little back and forth and it was obvious it was locked in. I disconnected the drive train control module last night and left it unplugged all night. Plugged it in this morning and it did it twice before leaving the house and once I backed out it the driveway it went back to working correctly and never did it again. I drove it all the way to daycare and to work this morning with no issues what so ever
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Sometimes it takes the moon to line up just right to get it out of 4WD low. There is a shift procedure in the owner's manual that seems to work well.
Hopefully it was just a bad connection at the control module, but it could be a sticky transfer case shift mechanism, among a dozen other things, and switching in and out of 4WD loosened it up. Did you check the oil level?
Hopefully it was just a bad connection at the control module, but it could be a sticky transfer case shift mechanism, among a dozen other things, and switching in and out of 4WD loosened it up. Did you check the oil level?
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I haven’t checked the oil level yet. I drove it to work to put it on our lift. Gonna check oil level and put some dielectric grease in the connectors to see if that helps any
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Fluid level was good. Drive it home and it did the same thing (confused for about 5 minutes the fixer itself and stayed fixed all the way home). Wife wanted to drive it this morning and she called me saying just keeps doing it and not fixing itself now. Think I’m gonna replace the DTCM first. I can’t see anything wrong with the harnesses. I Ohmed out as many wires as I could and nothing had high resistance and I’m getting 12v and good grounds at all the connectors
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So I called the dealership just to pick their brain. I know it’s not a good idea. Probably most everybody on this forum is smarter than the people at dealerships but I did it anyway. They said it could need a software update. My question is how could I have an intermittent problem if it was needing a software update. I’ve seen trucks electrical systems go nuts because they needed updating but they weren’t intermittent, they were always acting crazy and once the update was completed everything worked flawlessly. So could the Jeep need an update or is the dealership just feeding me BS? Thanks guys!
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There have been intermittent boundary conditions that software didn't handle smoothly, perhaps because the engineers didn't think the parameter would be exceeded. Most of the WK2s updates are like this. An update smoothed it out. Not saying that's what will help you. There are some competent techs and dealers about.
Had a lot of what you described early on in the thread. I'll explain my experience thus far and what is currently ongoing. I have a 2015 EcoDiesel with 26k miles, not sure how/if the transmission differs. Fortunately I am still under manufacturers warranty.
Drove ~2.5 hours, all highway, last Tuesday with no issues. Shut the Jeep down on the street to go check into the hotel. Came back out, and it was in complete limp mode, throwing every error possible (service transmission/service 4wd/traction control/etc/etc). I tried resetting the battery, hoping it had locked itself up or something with no luck. We had drove down for a concert, so I left it on the street with the intention of getting it towed back to the dealership at home the next morning (~130 miles, AAA+ covers 100 miles). Go out in the morning with a hail mary and try starting it, and it starts up with no issue what-so-ever. So we packed up and left - drove flawlessly on the trip home. I am still peeved but need to get to work, so drop it off at the dealership after work Wednesday night for a Thursday morning appt. They diagnose a faulty control module, so put it on order (got in Wednesday of this week) and work to install it. Fortunately I am out of town the second half of last week, so no skin off my back.
Well I just got a call from them about an hour ago saying that the new part made the transmission go from bad to worse and it wouldn't move at all. They considered replacing the module again to see if it was a bad module, but opted to replace the entire transmission instead. Looking like another week until the unit comes in + whatever it takes to actually get the new unit installed. May be a dramatic example, but figured I'd throw in my $0.02 since I'm living through it right now as well.
Drove ~2.5 hours, all highway, last Tuesday with no issues. Shut the Jeep down on the street to go check into the hotel. Came back out, and it was in complete limp mode, throwing every error possible (service transmission/service 4wd/traction control/etc/etc). I tried resetting the battery, hoping it had locked itself up or something with no luck. We had drove down for a concert, so I left it on the street with the intention of getting it towed back to the dealership at home the next morning (~130 miles, AAA+ covers 100 miles). Go out in the morning with a hail mary and try starting it, and it starts up with no issue what-so-ever. So we packed up and left - drove flawlessly on the trip home. I am still peeved but need to get to work, so drop it off at the dealership after work Wednesday night for a Thursday morning appt. They diagnose a faulty control module, so put it on order (got in Wednesday of this week) and work to install it. Fortunately I am out of town the second half of last week, so no skin off my back.
Well I just got a call from them about an hour ago saying that the new part made the transmission go from bad to worse and it wouldn't move at all. They considered replacing the module again to see if it was a bad module, but opted to replace the entire transmission instead. Looking like another week until the unit comes in + whatever it takes to actually get the new unit installed. May be a dramatic example, but figured I'd throw in my $0.02 since I'm living through it right now as well.
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Hello CG27519,
We regret to learn of this experience and understand your frustrations. We would like to offer our assistance while you are working with your dealer and make sure we can get you in contact with the proper teams. Please send us a private message with your VIN, phone number, curren mileage and servicing dealer.
Julie
Jeep Social Care Specialist
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Hi 06cummins5.9, I am having exactly the same problem with my wife's jeep. Just wondering if you managed to solve it and how? Dealer wants to replace the whole transfer case, they are charging about $4200
Hi Mandinga 71 & 06cummins5.9. Having same issue here ESC light is on, ESC system is not operating. U0102 error codes in ABS & Transmission, U0114 error code in Insrument cluster.
Would be great if you share how you solved the issue.
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5,957 Posts
Hi parakz,
I'm sorry to hear that you are experiencing a similar concern. If you decide to address this with your local Jeep dealer, we would be more than happy to provide you with an additional layer of assistance for that process. We are just a private message away.
Mark
JeepCares
Great to hear that FCA is changing its approach of serving customers. Before it took me weeks to get support from FCA, and the result wasn't satisfactory (wheels corrosion case)
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u0102-00
HI guys!
I have a 2014 Grand Cherokee diesel I am currently having the same issue with u0102-00 lost communication with transfer case module / AWD.
it comes on and goes off....
when it comes on I cannot turn at low speeds correctly. when the light is off my vehicle is fine...
any help would be greatly appreciated.
Many thanks
HI guys!
I have a 2014 Grand Cherokee diesel I am currently having the same issue with u0102-00 lost communication with transfer case module / AWD.
it comes on and goes off....
when it comes on I cannot turn at low speeds correctly. when the light is off my vehicle is fine...
any help would be greatly appreciated.
Many thanks
I’ve been having the same problems with my GC. Service 4wd and traction control lights come on. it doesn’t turn well at low speeds and hesitates on takeoff from a cold a start. Took it to a mechanic and was told I would need to take it to a dealer. The dealer wants to charge me TWO diagnostic fees at $170 ea. “Because there are two systems that have to be checked.” I thought that was Xx so they “just checked the electrical”. They want to replace the control module and the transfer case, which sound right after reading some things online. But they want to charge me $5600!
1. Does the control module under the driver’s seat really have to be programmed by the dealer?
2. If I change the control module will I still have to replace the transfer case?
3. The vehicle has hesitated in lower gears after cold starts since we bought it new, and two other dealers said “can’t duplicate the problem“. Could changing the control module solve this problem?
Thanks!
1. Does the control module under the driver’s seat really have to be programmed by the dealer?
2. If I change the control module will I still have to replace the transfer case?
3. The vehicle has hesitated in lower gears after cold starts since we bought it new, and two other dealers said “can’t duplicate the problem“. Could changing the control module solve this problem?
Thanks!
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23,770 Posts
The tranfercase or control module is unlikely to be the cause of hesitation. It could be the cause of your other problems.
A good 4x4 shop should be able to service it.
The control module is plug and play, no programing needed.
Rebuilt transfercases are expensive and there is quite a bit of labor involved. I dunno what the current rate is.
You could replace the controller, but thats not going to do much good if the transfer case is indeed jammed. In fact there is a chance the new controller will burn out.
There are transfer case failure modes that burn out controllers, and controller failure modes that burn out the transfercase shift motor. For issues like this, most shops replace both the controller and motor. In your case, they suggest replacing the entire case because its jammed and the controller because its prudent.
A good 4x4 shop should be able to service it.
The control module is plug and play, no programing needed.
Rebuilt transfercases are expensive and there is quite a bit of labor involved. I dunno what the current rate is.
You could replace the controller, but thats not going to do much good if the transfer case is indeed jammed. In fact there is a chance the new controller will burn out.
There are transfer case failure modes that burn out controllers, and controller failure modes that burn out the transfercase shift motor. For issues like this, most shops replace both the controller and motor. In your case, they suggest replacing the entire case because its jammed and the controller because its prudent.
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