WK2's Have Forward Collision Warning Issues - Page 7 - Jeep Garage - Jeep Forum

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  #73  
Old 03-23-2015, 11:41 AM
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Re: WK2's Have Forward Collision Warning Issues

Whoo-Hoo mine finally worked today.


I was having the same concern as some others with my 2015 Overland that FCW was not working with ACC Off.


I have seen the FCW Warning a couple times to !! BRAKE !! when ACC was on.
But it has never warned me with ACC off.


Never isn't so long though 4 weeks and 1100 miles. I have tried to test it numerous times and nothing. It felt beyond comfort zone. What was bothering me is, if it was any later it seemed a bit pointless. And it was set on Far. I can't imagine how late it would be if it was on Near.


I think every owner with Uconnect knows, as good as it is, can be a little buggy. Where you set some checkmark and later go back in on something and it's unchecked. This was not the case here, but I've seen it in the past on my 2014 Limited.


Magically problems would disappear if I factory reset my 2014 Limited (without FCW). So I wanted to Factory Reset UConnect to see if that might help.


Bingo !! First test after a UConnect Factory Reset the FCW Warning with ACC off worked !!


I hate making a suggestion that could be complete nonsense and it could be. Is it a coincidence It worked on the VERY first trip out after I factory reset it? Possibly. But I doubt it.


Also be aware that I am better informed of the conditions to test it. Like prior tests maybe I had my foot slightly on the brake. Or I tested it below 20MPH. But it had gone off with ACC ON and engaged twice. But it was ACC that partly aggravated the encounter in the first place. I normally drive pretty lax.


Any way the situation to test it was nearly perfect. I had just washed it the day before by the way. Clear crisp morning.


Driving along at about 30-35MPH.


Up ahead was a Semi and Mercedes SUV behind it both stopped fairly hard. But I (my lax driving) was probably 15 car lengths behind. So this felt like a good situation to test it and I would not piss anyone off if I "zoomed" up to them (because they just stopped hard). Or cause an accident as nobody was behind me. I suspected since I had been riding behind the MB SUV it has already "tracked" it as a vehicle (as opposed to a stationary object).


So I just let it zoom in at 25MPH-ish and made sure not to touch the brake. And bingo the warning came up in plenty of time. And it didn't feel all that terribly risky.


I'll know for sure if the Factory Reset fixed it, if warnings come up now and then without "Testing".


Regardless I feel better that is seems to be working as designed.


I'll try to update this either way.


If it is indeed a UConnect glitch and Factory Reset fixed it. It's bit scary an "Infotainment" bug now IS a matter of life and death Again this is NOT FACT, NOT LAB TESTED and just a hunch.

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  #74  
Old 03-23-2015, 12:53 PM
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Re: WK2's Have Forward Collision Warning Issues

When FCW doesn't work, the light on the FCW button below the radio comes on and you receive a warning in the EVIC, according to my experience. The problem I've had is it and ACC shutting off on long trips for five to ten minute periods, then becoming available again.
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  #75  
Old 03-23-2015, 06:55 PM
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Re: WK2's Have Forward Collision Warning Issues

I think mine was behaving as if it was set to Near. I was able to test it again this evening on the way home. No errors or anything. Just would never fire. But would with ACC active.

I wonder if when ACC is active it automatically goes into FAR mode for FCW.
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Old 03-24-2015, 12:28 AM
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Re: WK2's Have Forward Collision Warning Issues

The FCW system on my 2015 has worked great so far.
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  #77  
Old 03-24-2015, 09:12 AM
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Re: WK2's Have Forward Collision Warning Issues

The BRAKE! warning you get with ACC engaged is not necessarily the FCW system activating. I think they both look the same, but they're two different systems.

From the 2015 manual p205:
Quote:
A Proximity Warning will alert the driver if ACC predicts that its maximum braking level is not sufficient to maintain the set distance. ...
NOTE: The "Brake!" Screen in the DID is a warning for the driver to take action and does not necessarily mean that the Forward Collision Warning system is applying the brakes autonomously.
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  #78  
Old 03-24-2015, 09:13 AM
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Re: WK2's Have Forward Collision Warning Issues

Quote:
Originally Posted by mswlogo View Post
It's MEANT for the opposite. It does not activate below 20MPH.

It activates above 5mph. Please check the manual if you don't believe me


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  #79  
Old 03-28-2015, 05:58 PM
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Re: WK2's Have Forward Collision Warning Issues

Not necessarily true, if you have ACC with stop and or FCW with stop "it works from 0 to a configurable upper bound. If the target vehicle comes to a standstill the ACC+ system will also bring the ACC+ host vehicle to a stop, and will keep the vehicle at a standstill for an undetermined period of time by first applying the brakes and after brake timeout, cancelling the ACC+ system and applying the electronic park brake (EPB). The ACC with stop and go will also incorporate Forward Collision Warning-plus (FCW). With grade braking, the transmission will automatically downshift to maintain selected vehicle speed and distance, preventing overheating of brakes".
This is a direct quote from a detailed spec sheet that Chrysler sent me.

My ACC + stop feature works great at least for the first 2500 miles that I have on the car but the FCW+ stop does not work at all and the dealer who has had the car over two weeks now says there is no problem "it works as it was designed since there are no codes"
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Old 03-28-2015, 07:16 PM
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Re: WK2's Have Forward Collision Warning Issues

ACC+stop & FCW+stop actually start at 0 MPH according to the Chrysler spec sheet.
The manual says 5 MPH, I don't know what years this may pertain to, I have a 2015
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Old 03-30-2015, 04:22 AM
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Re: WK2's Have Forward Collision Warning Issues

mine works great.

I only hate it when you are coming up on stopped traffic and are changing into the other lane. Sometimes it will break check you thinking your going to hit the car in front of you. In normal situations it never happens. Only when I am driving more aggressively does this happen.
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  #82  
Old 04-04-2015, 10:01 AM
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Re: WK2's Have Forward Collision Warning Issues

Almost 2 years and 22000KMs later, had 2 false alerts, not sure I trust this FCW technology in my 2014 Overland..
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  #83  
Old 04-04-2015, 10:14 AM
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Re: WK2's Have Forward Collision Warning Issues

[QUOTE=studio1930;878723]I drive aggressively and mine has gone off many times. It has also gone off a few times due to instantly stopping traffic and has applied my brakes for me. I like it. [QUOTE]

I agree! Mine works perfectly!
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  #84  
Old 04-04-2015, 11:31 AM
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Re: WK2's Have Forward Collision Warning Issues

i turned the auto braking option off, too many alerts due to NY/NJ drivers and highway design...i only have the brake warning on. a lot of alerts go off when people merge or exit the highway. In the city, with the taxis constantly cutting you off, its was more of a hassle than help...
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