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Old 11-24-2013, 08:10 PM
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4wd low problem

Hey guys, I have an 07 wk hemi and when i try to shift it into 4wd low i get a message in the info center saying "service 4wd system". Any idea why? Everything else seems fine with the jeep
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Old 11-25-2013, 01:36 AM
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Re: 4wd low problem

Wish I could answer this for you. I just pulled up on the 4low lever in my 2008 5.7 a couple of days ago and got the same message. A month or two ago I got the 4x4 maintenance done at the dealer. Prior to this I had no problem. Would like to know what is up with this before I go back to dealer and inquire.
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Old 11-25-2013, 03:07 AM
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Re: 4wd low problem

No specialist on the WK, but this message means that the FDCM (final drive control module) has detected a fault.
In your case it most probably has to do with the solenoid which should do the selection to 4Lo, but first the fault code must be retrieved.
On some sites they say to do the keydance (ignition switch off/run three times and leave in run at the third time. Seems on the WK that all doors need to be closed for this to work), but wonder if it will show faults from the FDCM.
Worth a try though.
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Old 11-27-2013, 08:43 PM
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Re: 4wd low problem

Cold and icy snow today, I experienced the same problem. I just pulled up on the 4 low lever in my 2006 4.7 and got the same message. SERVICE 4WD SYSTEM A month or two ago I changed the transfer case Quadra Trac 11 NV245 fluid. Prior to this I had no problem. I did the key dance and nothing came up but a 10 blink illumination of the small engine outline. No codes Scanning OBD-II.
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Old 11-27-2013, 08:58 PM
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I've had my jeep in a heated garage for two days now thinking the same thing. I also changed my transfer case fluid but that was 5 months ago and 4 low worked after.
I tried the key thing and couldn't get that to work and tried my scanner with no luck.
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Old 12-06-2013, 07:58 PM
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Re: 4wd low problem

I have had my WK in a heated garage, done a visual, got no codes OBD-II. I did change the transfer case fluid a few months ago and maybe lost some fluid, not much. Can't remember if I tried 4wd lo after the fluid change. Any direction or ideas?
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Old 12-10-2013, 08:45 PM
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I did find out there is a module under the driver side rear passenger seat for the transfer case, but it looks lime i will have to remove the back seat to get to it.
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Old 12-11-2013, 11:36 AM
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Re: 4wd low problem

Not familiar with the WK, but it is probably the FDCM (Final Drive Control Module)
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Old 12-11-2013, 01:51 PM
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Re: 4wd low problem

Those whose 4lo went out after a dealer service probably had the "N23" recall flash performed there. There is a thread on this forum, and a very detailed thread on another forum which show a strong connection.

The issue is the xfer case actuator, which is failing the enhanced testing of the new flash, it seems. However, in many cases where Jeep provided a new actuator, the problem returns.

I personally will not allow this recall to be performed. Some originally laughed at me for saying this, and have now lost 4lo.

If I was in your position, I would let the dealer know, ASAP, and request that they reflash your vehicle, taking care to follow step #15 in the N23 procedure, which requires a code to be cleared THREE TIMES. Again, THREE TIMES.

If the problem returned, I would notify the dealer, but give up on a near-term fix. Chrysler still hasn't owned up to the problem, and some customers are paying big money to chase this problem.

To get your 4lo back temporarily, you can use a Flashpaq to clear the code, and then 4lo works again, apparently. However you need to keep doing this, and I'm not sure how often.

Good luck. I'm confident that this will eventually be fixed, but in the near term a Flashpaq is your best bet.
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Old 01-05-2014, 10:25 PM
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Re: 4wd low problem

After trying a OBDII, checking the fluid level of my recently serviced transfer case, checking connections and continuity, I followed JohnGreen1234 post below.

I called the dealership where the N23 recall procedure was performed. I was assured that the correct procedure was followed at the dealership and I may have a different problem. I asked for a redo to which the dealership agreed to do only for a fee. Pressing a manager to leave all that I called about in my file, he agreed.
Then I went out and bought a Flashpac Superchip and erased the code for the transfer case that screened up. After all this , I tried the 4wd lo and it worked perfectly fine. If it happens again, I keep the Flashpac in the Jeep and can get to it and erase the problem code right now. BIG THANKS TO JOHNGREEN1234!!! hopefully Chrysler will fix the problem.

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Quote:
Originally Posted by johngreen1234 View Post
Those whose 4lo went out after a dealer service probably had the "N23" recall flash performed there. There is a thread on this forum, and a very detailed thread on another forum which show a strong connection.

The issue is the xfer case actuator, which is failing the enhanced testing of the new flash, it seems. However, in many cases where Jeep provided a new actuator, the problem returns.

I personally will not allow this recall to be performed. Some originally laughed at me for saying this, and have now lost 4lo.

If I was in your position, I would let the dealer know, ASAP, and request that they reflash your vehicle, taking care to follow step #15 in the N23 procedure, which requires a code to be cleared THREE TIMES. Again, THREE TIMES.

If the problem returned, I would notify the dealer, but give up on a near-term fix. Chrysler still hasn't owned up to the problem, and some customers are paying big money to chase this problem.

To get your 4lo back temporarily, you can use a Flashpaq to clear the code, and then 4lo works again, apparently. However you need to keep doing this, and I'm not sure how often.

Good luck. I'm confident that this will eventually be fixed, but in the near term a Flashpaq is your best bet.
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Old 01-06-2014, 02:04 AM
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Re: 4wd low problem

Wowsers... this is making me nervous for the sweet old folks that bought my jeep... The DAY I handed the keys over I figured I would do em a solid and run the jeep over to the dealer I used to work for so I could say hi to the guys and get the recall taken care of. My jeep ran like a top and was in amazing shape for 205k miles and that would bother me to find out they had problems after the recall I didn't give them the option of performing or not.
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Old 01-06-2014, 02:45 AM
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Re: 4wd low problem

I guess I will have to try this. Right now I am having charging issues with my Jeep.
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