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  #1  
Old 12-18-2014, 10:00 PM
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Forward collision warning question

Hello,
I got my new GC with adv tech package this week. Has anyone been able to verify FCW ? I set the sensevity to "far' and action to break, however the car never takes any action even if I am getting very close to the car in front while driving. ACC seems to be working though.

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  #2  
Old 12-18-2014, 10:37 PM
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Re: Forward collision warning question

It will work Olivia. The most common way in which it is triggered is when you are driving behind another car (at just the right speed and distance) and the car in front makes a turn, out of your pathway. Should you fail to slow down, you'll get several warnings then the car will apply the brakes. Mine came to almost a complete stop during a voluntary testing.
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Old 12-18-2014, 10:44 PM
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Re: Forward collision warning question

Thanks. Could you describe in detail how to reproduce this? What speed and what distance?
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Old 12-18-2014, 11:59 PM
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Re: Forward collision warning question

The acc works great set your speed say 65 and off you go,someone pulls in front of you at 55 you slow down so then you pull out in the passing lane and back to 65.Try it out on the by-pass or turn pike.its a odd feeling at first

but the more you use it the more you'll like it.

fcw and acc are two diff. things
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Old 12-19-2014, 07:51 AM
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Re: Forward collision warning question

Quote:
Originally Posted by Olivia_2015 View Post
Hello,
I got my new GC with adv tech package this week. Has anyone been able to verify FCW ? I set the sensevity to "far' and action to break, however the car never takes any action even if I am getting very close to the car in front while driving. ACC seems to be working though.
FCW will only trigger if it thinks a collision is imminent. It uses more than just speed and distance to judge that so it would be very dangerous to try and simulate it. FCW gets speed, brake state and wheel articulation from the ECM, relative speed between you and the front vehicle from the front Doppler Radar sensor and road posture from the front facing camera. it uses all this data to predict your risk during the next few seconds and will take progressive action if it thinks you are in danger. As f1anatic stated, FCW will sometimes false trigger while you negotiate a left bend and the vehicle in-front of you is making a right turn off the road. Though you know the turning vehicle is off the road, FCW still views it as a threat.
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Old 12-19-2014, 08:19 AM
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Re: Forward collision warning question

Guys,
Would that be right assumption that since acc is working the fcw should also work? I am a very defensive driver, therefore I don't think I will ever be able to figure out that this feature is working or not.
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Old 12-19-2014, 01:57 PM
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Re: Forward collision warning question

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Originally Posted by Olivia_2015 View Post
Guys,
Would that be right assumption that since acc is working the fcw should also work? I am a very defensive driver, therefore I don't think I will ever be able to figure out that this feature is working or not.
Yes with acc on it will apply the brakes if needed.one day a car in the passing lane jumped in front of me and then to the exit ramp.the brakes came on rather hard so too maintain the proper distance.
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Old 12-19-2014, 02:28 PM
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Re: Forward collision warning question

The late 2014 and all 2015 WK2s with ACC/FCW will actually brake the vehicle even ACC is not engaged.

The FCW (Forward Collision Warning should sound an audible alert and then, if no corrective action is taken, it should also apply the brakes. This should happen whether or not the ACC (Adaptive Cruise Control) is engaged.


"Testing" the FCW system is not advised since it would require almost colliding with another vehicle.
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Old 12-22-2014, 07:28 AM
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Re: Forward collision warning question

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Originally Posted by Snipe315 View Post
The late All 2014 and all 2015 WK2s with ACC/FCW will actually brake the vehicle even ACC is not engaged.

The FCW (Forward Collision Warning should sound an audible and visual alert, flashing the word "BRAKE" on the 7 inch screen behind the steering wheel and then, if no corrective action is taken, it should also apply the brakes. Brakes are applied as a series of "jolts" rather than a single, smooth but forceful braking instance. This should happen whether or not the ACC (Adaptive Cruise Control) is engaged.

"Testing" the FCW system is not advised since it would require almost colliding with another vehicle.
Edited for clarity.
I do not advise you to try it but it can be tested with relative safety. For liability reasons I will not describe how aside from the blurb above. Also, make sure that your FCW is set to FAR in the settings menu. Occasionally you may have to clean the radar lens as well as the windshield section in front of the camera lens: look to your rear view mirror from the outside of the vehicle. You should see a small triangular "window".
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Old 12-23-2014, 10:08 PM
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Re: Forward collision warning question

if you want to test it easily just merge behind someone right after they pass. It will set it off for you.
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Old 12-29-2014, 05:01 PM
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Re: Forward collision warning question

As in pull up behind him within a car length when they move into your lane? Define merge? Move into their lane within a car length?
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Old 12-29-2014, 05:07 PM
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Re: Forward collision warning question

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Originally Posted by RedBanker View Post
As in pull up behind him within a car length when they move into your lane? Define merge? Move into their lane within a car length?
I've never noticed it after a normal merge... doesn't it require a decreasing distance?
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