2015 JGC Overland 'Service Shifter' light - Jeep Garage - Jeep Forum

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  #1  
Old 09-25-2015, 12:52 PM
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2015 JGC Overland 'Service Shifter' light

Hi Everyone. First time Jeep owner and really like my JGC. Love how quiet it is and the surprising power (ecodiesel). But, hope I am not looking at a long term PIA: since I drove it off the lot (now at 1,200 miles), I have the same recurring problem. I am getting a 'Service Shifter' warning light and audible ding only when I turn left. Any speed, any transmission state (auto, sport, manual) and after the jeep has driven for about 15-20 minutes. Light stays on for 2-3 seconds. Dealer says it does not show up on event list; they did say they found a service bulletin indicating that a loose connection could be the cause of the problem. They kept the car for two days, telling me that they found the connector, disconnected and reconnected. They tested the car for about 8 miles and reported no Service Shifter events. When I drove it home, after 10-12 miles, I got the service light. I thought the service adviser was very nice and seemed knowledgeable and I have no real problems going back but I would like to see if we can figure this out before someone starts tearing the car apart. I've searched high and low for "2015 JGC Service Shifter" and have found very little (what does show up is a couple problems in 2014 but the problems were very different). I have a video attached to show how the alert occurs (seems to have a problem with 3.4mb file). So, good friends, I am open to any advice on how to proceed. I really love this car.
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  #2  
Old 09-26-2015, 07:36 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Lift the top of the shifter and make sure the screw on top is screwed down properly. I had service shifter after I had my phone install and when they took the centre console out they didn't put the shifter back together properly and all it was the screw wasn't fully screwed down.


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Old 09-26-2015, 08:17 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Do you think it's possible it has anything to do with the paddle shifters?
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Old 09-26-2015, 12:06 PM
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Re: 2015 JGC Overland 'Service Shifter' light

Thanks Hunch801 and Keysplayr. I'll see if I can pop the top off the shifter. And Keysplayr, I don't think the problem is related to paddle shifter since the message (Service Shifter) comes on even in automatic mode but I did have that idea initially.
Somehow, in my analysis, this left turn thing has to be centrally involved (since it only happens on a left turn and only after the car has been running for 10-12 miles). What mechanisms operate on a left turn? Steering shaft, pinon gear, tie rods seem unlikely to affect the electronics between shifter and transmission. When you turn left, gravity pushes right? So is it possible that something is pushing on the wiring? Big items--transmission, drive shaft, engine mounts--would have to be very loose for that to happen. But why would the car have to be well warmed up for this to happen? Mettle swelling due to heat? Can something work loose as you drive more (we took an 800 mile road trip a couple weeks ago and after the first Service Shifter alert, the car threw this alert every time we turned to the left--what I am trying to say is that on a casual 20 minute drive the alert is intermittent, but on a longer drive it is completely consistent, every turn to the left). Just trying to think this through rather than having a dealer mechanic just pulling things off.
Thanks for your ideas.
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Old 09-26-2015, 07:02 PM
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Re: 2015 JGC Overland 'Service Shifter' light

Start your car and then start tapping/whacking the centre console around the cupholders, side panels, offroad controls, etc.

Shifter lights will likely start flicking on and off and the shifter fault appear.
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Old 09-27-2015, 04:11 PM
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Re: 2015 JGC Overland 'Service Shifter' light

Tillsy, your approach sounds a little bit like trying to diagnose a possible broken ankle by twisting the foot around but I'll give it a try. Is your reasoning that by pounding around the shifter, if lights come on or go off or flicker, then that suggests that some wires in the area are pinched or rubbing etc.? In that case the dealer should pull tunnel off and check the wiring?
Hutch801, I ordered some trim tools to take the top of the shifter off to see if another nut is loose (me and it...).
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Old 10-01-2015, 11:27 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Follow up: Tillsy, I slapped the transmission tunnel, shifter, cup holder, etc around like I was James Cagney but nothing flickered, came on or went off. And here's what's going on with the dealer: took JGC for scheduled appt to find source of Service Shifter error message on 9/22. Picked it up on 9/24 where service adviser said they had checked some things and tested for 8 mile drive without error message. Error message popped up on my drive home. Called and left message for adviser same day. He didn't return call so I called him on 9/29. He feigned no knowledge of my message and said he would do some research on my Service Shifter problem. No call back as of 10/1. Seems odd. Are they truly not interested in solving my problem?
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Old 10-13-2015, 11:12 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Following up. Dealer called and said the factory recommends changing some module--the service tech said he didn't know which one but expected to be clarified by the time I bring my JGC in next Monday. Expects to keep the truck for 2-3 days. The tech did say, hope the factory isn't just picking one module out of 12 and hoping it works. Inspires real confidence.
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Old 10-21-2015, 07:06 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Quote:
Originally Posted by dtopa View Post
Following up. Dealer called and said the factory recommends changing some module--the service tech said he didn't know which one but expected to be clarified by the time I bring my JGC in next Monday. Expects to keep the truck for 2-3 days. The tech did say, hope the factory isn't just picking one module out of 12 and hoping it works. Inspires real confidence.
dtopa, I hope things worked out?
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Old 10-21-2015, 09:00 PM
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Re: 2015 JGC Overland 'Service Shifter' light

Thanks LJS8510. Well, not worked out but here's where I stand and I would appreciate any advice. I had a service appt for the previous Monday. On the Friday-Sunday before that, we drove about 400 miles for the week end and rarely experienced the Service Shifter MIL. So, it did pop up but substantially less frequently that earlier (like 4 times versus 20 times). I drove to the dealer on Monday, we talked and decided to see if this issue was going to decline in its frequency of occurrence. I decided to go along with this plan because the alternative was to start replacing parts (I believe factory suggested replacing ECM and PCM, as I recall). I am not a big fan of tearing apart new cars--I put myself through graduate school working on cars and 'discovered' that breaking a new (factory) engine carries with it a certain amount of long term risk. In all respects, I love the JGC and want to do right by it in the long run. On the other hand, hoping the MIL will go away through time and distance seems crazy--as if, there is no underlying issue. Advice? And thank you.
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Old 10-21-2015, 10:25 PM
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Re: 2015 JGC Overland 'Service Shifter' light

Sorry to hear that, I saw this interesting post below, suggesting Shifter replacement has worked for some.
Service Shifter error message - Page 3 - 2014 - 2015 Jeep Cherokee Forums
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Old 10-22-2015, 10:12 AM
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Re: 2015 JGC Overland 'Service Shifter' light

Thanks LJS8510. Yes, I did find that situation reported. When I asked the service rep, if the MIL says, Service Shifter, wouldn't it make sense to service the shifter (or replace it)? He says FCR doesn't think the MIL is due to a shifter issue. Hmmm. Does anyone have any ideas about how to track this MIL while driving (since it seems to occur only after a fair amount of driving and after a series of sharp turns)? I have an obd reader but the MIL doesn't show up as a stored error code. If this were a computer network (and the jeep's really is) you could monitor the network traffic (e.g., using WireShark). Don't suppose there is anything available to monitor the communication traffic of the jeep's computers? I mean those guys who discovered how to hack into the jeep's system a month ago or so must have figured out how to get into the system. Any teckies know anything about this?
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