Hi - I'm hoping someone can help me out. I'm located in southern ontario, canada - in the Fergus / Elora area.
My 2006 commander was fine up until about 8 months ago -it is a low mileage (192,000 Km)vehicle - I had a Service 4WD System notice pop up on the dash - I didn't think much of it - we rarely if ever have used 4wd. So about a month ago I put the jeep in 4WD - it went in fine - I drove it a km or so - and tried to take it out of 4WD - well it would not come out - I drove it a short distance home - any further attempts to take it out of 4wd were fruitless. I tried checking any codes with an obd2 reader - and no codes were coming up. I did an internet search and tried pulling the #25 fuse to see if that would make a difference - and nothing.
I did some more internet searches and decided to try a new aftermarket transfer case motor -for 560.00 (dealer wanted 700 +) - and it made no difference - the jeep would not come out of 4wd - however I did have to rotate the shaft on the transfer case to accept the female input on the new transfer case motor - so the jeep came out of 4wd sort of - it no longer has the high revs for the 4wd low gearing - I can drive it at highway speeds but I can still tell it is somehow in 4wd by the way the jeep lugs (I have decided however not to drive it until I can fix it). I called the company (Dorman - very reputable) that makes the aftermarket transfer case motors - they agreed it could be a faulty new motor and agreed to replace it with another one for me - I tried it and again it made no difference.
I called my local jeep dealer - he checked the vin and said it had outstanding recalls - including 2 for the fdcm - so I had nothing to loose - I took it in and they did the updates free of charge - I thought maybe that would fix the problem. I asked them to troubleshoot the 4wd problem. And the tech said it is probably the fdcm - as he wasn't seeing a signal from it - "no output from 4wd module to actuate unlock" was the exact wording written on the repair notes. I have my doubts though as I sometimes do hear the transfer case motor clicking and trying to do something - what I don't exactly know. The dealer said he could bring me in a new fdcm - but they wouldn't guarantee it would fix the problem as I put in an aftermarket part - and that could short out the new fdcm - I wasn't too happy with that.
My next step was to call a wreckers and I found a used fdcm - the same one that is in my 2006 commander - P56044129AK for $ 185.00. So I bought that - and put it in - again no difference. I suppose there is a chance that the wreckers gave me a bad used fdcm - possible ??? I can take it back for a refund - but still have it for now.
So I'm somewhat stumped as to the problem - I'm no expert but not stupid either - I have spent 600 on the new transfer case motor, and the jeep dealer has about 150.00 of their time into it. I figure I have a few options left:
1 - call the dealer back - pay them 450.00 for a new fdcm and pray that is the problem
2 - go to a new dealer and get a second opinion
3 - learn more about the 4wd system - is there anything else partswise I'm missing here ?? - ie could something else be bad ?? - some switch in the transfer case or something else electrical ?
4 - find someone else who has a 2006 or 2007 commander and get them to try the fdcm I have from the wreckers - very simple to do - just unplug theirs and plug mine in to see if causes the same fault on their vehicle ( but then again I doubt anyone would help me as they would be afraid I would f*** up their commander). I don't want to buy a new fdcm for 450.00 if it is not the problem.
5 - find a 4wd specialty shop in southern ontario somewhere that are experts with jeeps - ie someone who knows their stuff and has experience.
6 - post this on jeepcommander.com and see if anyone else has similar problems.
That's the lowdown of the problem - any advice or input is greatly appreciated - I really would like to get the vehicle back on the road.