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  #13  
Old 04-11-2016, 12:54 PM
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Re: "Service 4wd" light

I did not have to get a SW flash since the replacement; and the error has not come back since.

Your results may vary, but I seem to believe that you will be fine without a flash based on my experience.

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  #14  
Old 04-18-2016, 12:58 PM
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Re: "Service 4wd" light

How will you know if the electric limited slip is functioning? Just the absence of warning codes?
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  #15  
Old 04-22-2016, 12:20 PM
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Re: "Service 4wd" light

Once the error goes away: I assumed that all was good. But, because that wasn't enough for me: I took my truck to a nearby dirt road and gunned it in "sport mode" to make sure I wasn't getting one-wheel peel to confirm that the motor/system was working correctly.
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Old 05-13-2016, 05:12 PM
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Re: "Service 4wd" light

I thought sport mode disengaged traction control and hence the all wheel drive ability?
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Old 05-15-2016, 01:05 PM
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Re: "Service 4wd" light

Thanks for your detailed post.

I'm experiencing a similar issue it started with the light coming on and code C2221-00 being active, a TSB 21-008-11 for re-flashing the DTCM, so I take it to the dealer and pay their ridiculous diagnostic fees to get it looked at and re-flashed, only to have them call me back and tell me there are now 2 new codes both C148F-1D (Rear diff current out of range) and C2220-00 (Rear diff ECU internal). They told me it needs a motor/actuator $777.00 and an AWD module $600.00, and that the rear end is chattering.

So, I can understand the code C148F-1D for the the actuator, as it goes bad or gets gummed up it takes more current to turn it. Maybe the second code C2220-00 will go away once the current is in range. I've had a slight vibration since I bought this used as well, so maybe the rear end has an additional problem as well. In my case maybe a used unit swapped in as a whole will solve most issues.

Does anyone know where to buy a new motor like Roby did to swap into this as a start?

How can I find out if the rear end is actually making noise and its not just the motor making it?

Anything else I should do first?

Thank you for any help on this...

Jocco,
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  #18  
Old 05-16-2016, 02:28 AM
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Re: "Service 4wd" light

Great job on the DIY. Where did you find the new motor?
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  #19  
Old 05-16-2016, 04:28 PM
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Re: "Service 4wd" light

This motor can be found at a more reasonable price on E-bay in new form, OR, you can purchase a whole eLSD (rear transaxle) unit with the motor attached from a junk yard and salvage just the motor from the sub-assy and install on your vehicle.
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  #20  
Old 06-02-2016, 12:23 PM
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Re: "Service 4wd" light

I found more information about my traction control question on another forum here:
"Sport" Mode question - JeepForum.com

"Sport mode biases the transfer case to give you more of a rear wheel drive feel. It does not turn traction control completely off but Jeep engineering does not provide more information. The light warns you that traction control is not completely enabled."
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  #21  
Old 06-20-2016, 02:25 PM
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Re: "Service 4wd" light

32,xxx miles and my WK2 diesel just threw "service 4wd system" message. Going into the dealer in a week and will report.
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  #22  
Old 06-22-2016, 12:36 PM
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Re: "Service 4wd" light

Quote:
Originally Posted by stician View Post
32,xxx miles and my WK2 diesel just threw "service 4wd system" message. Going into the dealer in a week and will report.
Hey stician,

Please feel free to reach out if you need additional assistance. Let us know how it goes at the dealership!

Kori
Jeep Social Care Specialist
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  #23  
Old 06-22-2016, 02:40 PM
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Re: "Service 4wd" light

Quote:
Originally Posted by JeepCares View Post
Hey stician,



Please feel free to reach out if you need additional assistance. Let us know how it goes at the dealership!



Kori

Jeep Social Care Specialist


Kori,

Thanks for the message. Outside the cat replacement at 18k miles this JGC has been a great vehicle. While I have your attention, the dealers in Ramsey and Paramus NJ appear to be swamped and routinely quote 5+ days for an appointment. It's been like this since my first oil change. As successful as the Jeep sales has been since the intro of WK2 I hope there are plans to support service expansion and customer experience to match other marques selling vehicles over the $40,000.

Thanks,
Ben
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  #24  
Old 06-30-2016, 03:07 PM
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Re: "Service 4wd" light

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Originally Posted by stician View Post
32,xxx miles and my WK2 diesel just threw "service 4wd system" message. Going into the dealer in a week and will report.


it was the cam sensor. the way it worked (around Northern NJ) is at least 5 days to get into a bay for diagnosis and 4 days to get this part in.
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