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  #25  
Old 05-15-2014, 01:04 PM
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Re: Issues with ACC

I'm SO glad I didn't pony up $1,700 for this option...



I've read that the Jeep Grand Cherokee's crash avoidance system is mediocre at best. Those that earned the rating of "Superior" from the IIHS were the Cadillac ATS and SRX, Mercedes-Benz' C-class, Subaru's Legacy and Outback and the Volvo S60 and XC60.

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Old 05-15-2014, 01:44 PM
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Re: Issues with ACC

I've only ever had this system but can honestly say it's amazing! I had one hiccup with it but it was because of foggy conditions. I would say most of the issues are with misaligned sensors or temp change causing condensation. That would simulate the foggy conditions that shutdown my system. I don't see how the system is unsafe? It works until it doesn't and shuts down and gives a error notification? It's called failsafe for a reason. I strongly suggest you go back to the dealer and get to the bottom of the issue. I would say it's probably the coolest feature on the 2014.


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  #27  
Old 05-15-2014, 03:09 PM
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Re: Issues with ACC

Quote:
Originally Posted by GCLimited View Post
I'm SO glad I didn't pony up $1,700 for this option...



I've read that the Jeep Grand Cherokee's crash avoidance system is mediocre at best. Those that earned the rating of "Superior" from the IIHS were the Cadillac ATS and SRX, Mercedes-Benz' C-class, Subaru's Legacy and Outback and the Volvo S60 and XC60.
Really?? The Cadillac one is terrible. put 3000 Miles on one and I can see why everyone likes the Systems in the Jeeps better.

http://www.edmunds.com/cadillac/ats/...-defeated.html (Cadillac Sucks)

Status Report

I have also read a number of journalists say that the full range cruise (stop and go) is better than the Mercedes. Coming from a Mercedes I can say this system has jolted me less.

Anyway I will find more articles but I can say from personal experience it is worth way more than the upgrade price.
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  #28  
Old 05-15-2014, 03:39 PM
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Re: Issues with ACC

Quote:
Originally Posted by GCLimited View Post
I'm SO glad I didn't pony up $1,700 for this option...



I've read that the Jeep Grand Cherokee's crash avoidance system is mediocre at best. Those that earned the rating of "Superior" from the IIHS were the Cadillac ATS and SRX, Mercedes-Benz' C-class, Subaru's Legacy and Outback and the Volvo S60 and XC60.
Sorry Found the Article you were reading....

News releases

So the 2014 Grand Cherokee rates "advanced" and scores better than the Volvo and all other Mercedes systems other then the C-Class as well as better then MOST of the vehicles in it's class.

I will stand by my position on the Cadillac... maybe the system works a little more effective in some situations but the "False" detections in the GM systems are well documented.
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  #29  
Old 05-20-2014, 09:36 AM
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Re: Issues with ACC

How well does the ACC with stop work in rush hour traffic, especially stop and go traffic?
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  #30  
Old 05-20-2014, 09:43 AM
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Re: Issues with ACC

Using any kind of cruise control in traffic is dangerous! Using any kind of cruise control in the rain or snow, as well, is dangerous. Consult the Jeep's owner's guide. ACC does work well if it is used as Jeep recommends, but Forward Crash Warning (FCW) is untrustworthy, from my personal experience.
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  #31  
Old 05-20-2014, 05:55 PM
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Re: Issues with ACC

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Originally Posted by Yeti View Post
How well does the ACC with stop work in rush hour traffic, especially stop and go traffic?
I often use it on Interstate in stop and go (more crawl, pause go) when my ankle gets tired for sometimes up to an hour. It is not a substitute for your attention but it has worked flawlessly for over 10,000 miles now. Even when people cut in front of you and or you change lanes, the system adapts very smoothly (slower on take offs from stop and will accelerate at a decent rate in a lane change.
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  #32  
Old 05-26-2014, 09:59 AM
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Re: Issues with ACC

I started having the same warning on my Summit after some pretty rough off-roading a week ago (I even temporarily lost the cover over the sensor). When working under the jeep to address some of the damage i caused tot eh bottom of the bumper, i took the lower pieces off. When looking at the sensor, i saw it sat in four little "grommets" and they were not all inserted tot he same depth (easy to see this from directly below the unit). I pushed all four corners in and sure enough the top ones moved in quite a bit (1-3 cm). I got hopeful that this would solve the issue and it did!

Several drives later and still no more warnings. I even nervously tried the ACC and it worked as expected. So at least for some people, it is just an aiming issue, and I just saved myself a trip to the dealer for this (still need to address the bumper issues/repairs).
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  #33  
Old 05-26-2014, 11:37 PM
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Re: Issues with ACC

Follow-up to my earlier post... Took 2 months to get a replacement ACC sensor (brought in for service on 3/11/14, part was on back order until 5/8/14). Since the sensor has been replaced, I haven't had a single occurrence of the "ACC/FCW Unavailable Please Wipe Sensor" message, whereas before it would come up at least once per trip, and phantom FCW alerts with no cars ahead of me. Works so much better in general now too, I wonder if there was an aiming problem as well. In any case, I'm much happier with the ACC system now!


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  #34  
Old 05-27-2014, 06:44 AM
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Triple Failure: ACC-FCW, Airbag, Telephone

2014 Jeep Grand Cherokee Overland 4x4 3.6L early 2013 build. 20,000 miles.

Yesterday the Jeep failed in three, perhaps related, ways. First, once again, the airbag service warning message appeared, this time with non-stop chiming for several minutes. Second, the UConnect LCD showed a message, on a bright red field that covered most of the display, "Vehicle Phone Needs Service." Third, the cruise control was unavailable and the EVIC message warned that ACC-FCW (Advanced Cruise Control-Forward Collision Warning) needed service.

I am fed up with this car. If Jeep won't take it back, then I will go forward with a lemon-law action.
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  #35  
Old 05-27-2014, 11:11 AM
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Re: Issues with ACC

Quote:
Originally Posted by Willx View Post
I often use it on Interstate in stop and go (more crawl, pause go) when my ankle gets tired for sometimes up to an hour. It is not a substitute for your attention but it has worked flawlessly for over 10,000 miles now. Even when people cut in front of you and or you change lanes, the system adapts very smoothly (slower on take offs from stop and will accelerate at a decent rate in a lane change.
Thank you so much for your rational answer, that's exactly what I was looking for!
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  #36  
Old 05-31-2014, 09:54 PM
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Re: Triple Failure: ACC-FCW, Airbag, Telephone

Quote:
Originally Posted by SLLJG View Post
2014 Jeep Grand Cherokee Overland 4x4 3.6L early 2013 build. 20,000 miles.

Yesterday the Jeep failed in three, perhaps related, ways. First, once again, the airbag service warning message appeared, this time with non-stop chiming for several minutes. Second, the UConnect LCD showed a message, on a bright red field that covered most of the display, "Vehicle Phone Needs Service." Third, the cruise control was unavailable and the EVIC message warned that ACC-FCW (Advanced Cruise Control-Forward Collision Warning) needed service.

I am fed up with this car. If Jeep won't take it back, then I will go forward with a lemon-law action.

Got the same exact symptoms today while on a trip approximately 5 hours from home!!! The chiming was from the seat belt being unbuckled even though it was NOT unbuckled. What a nightmare! Seems like some electrical failure. I have only 10K on this car and honestly at this moment it seems like my 210K old truck is more reliable.

Did you take you car to the dealer? Did they figure it out? I took some time off next week to take my family on a vacation. Hoping this is an easy fix because if I will have to rent a car this will be the first and last Chrysler product that I will ever buy.
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