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Adaptive Cruise Control & Collision Warning System


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108 replies to this topic

#1 OFFLINE   jholt26

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Posted 31 January 2013 - 09:01 PM

Hello, 

 

Just picked up a 13 fusion hybrid with adaptive cruise and forward collision warning.  My question is where are the sensors for the forward collision feature?  Also, how far away does the system warn you?  I was driving in the City today some cars were stopping in front of me and I never got a warning light.  I was approaching fairly quickly and did have to brake a bit harder than normal.  My sensitivity is set to high.  Anyone have any idea where the sensors are and how and when the system warns you?

 

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#2 OFFLINE   FusionDiffusion

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Posted 31 January 2013 - 09:24 PM

The radar sensor is located behind the driver's side of the lower grille.  You should notice one side of the grille is different than the other.  There is a picture in the owner's manual.

 

From what I understand, the warning will only sound if the system detects an imminent collision.  If your foot was already on the brake (even slightly) I don't think it will sound the alert.



#3 OFFLINE   terryb

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Posted 31 January 2013 - 10:34 PM

It is startling when it does its trick when you're looking the wrong way. :shift:


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#4 OFFLINE   acdii

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Posted 01 February 2013 - 03:01 PM

Dont worry, it will go off at some point and make you tinkle!  When someone moves to the right or left turn lane and slows down before you clear them, it will go off. It does work...when you really dont need it. 


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#5 OFFLINE   smr2112

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Posted 28 March 2013 - 01:41 PM

Does the automatic braking only work when the cruise is set ON with the adaptive cruise?

It won't brake in regular everyday traffic the way you describe it?


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#6 OFFLINE   Riggo

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Posted 28 March 2013 - 02:58 PM

Does the automatic braking only work when the cruise is set ON with the adaptive cruise?

It won't brake in regular everyday traffic the way you describe it?

 

Yes, that's how I understand it. It also doesn't brake the car fully to a stop, it only brakes a certain amount to keep it at the preset distance (with adaptive cruise on) and if it decides it needs more braking because of an impending collision the collison avoidance lights will flash and the driver must take over. The collision avoidance does precharge the brakes if it senses an impending collison but it won't stop the car for you. I've believe Volvo has a system where it actually brakes the car to a complete stop. I think Audi also has a system, or one in the works.



#7 OFFLINE   RedLdr1

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Posted 29 March 2013 - 07:57 AM

The ACC only slows the car down when the Cruise Control is ON.  There are five distance settings you can choose between for how close the system allows you to get before cutting power.  The only time the collision alarm seems to sound on my FFH, and on my old SHO, is when someone slows to turn in front of me and leaves my lane partially blocked.  I tend to keep a good distance behind other vehicles so it doesn't get to much usage.


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#8 OFFLINE   Riggo

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Posted 08 July 2013 - 08:52 PM

So I was going around a traffic circle today and a car was in the right lane in the circle just ahead of me. For some reason the collision avoidance system went off twice and it actually almost brought the car to a stop automatically. I guess since I was on a curve maybe it got confused?? Also, I never thought it was actually supposed to brake (my cruise control wasn't on), just precharged the brakes, but it actual brakes rather abruptly. Weird!

#9 OFFLINE   Waldo

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Posted 09 July 2013 - 09:47 AM

So I was going around a traffic circle today and a car was in the right lane in the circle just ahead of me. For some reason the collision avoidance system went off twice and it actually almost brought the car to a stop automatically. I guess since I was on a curve maybe it got confused?? Also, I never thought it was actually supposed to brake (my cruise control wasn't on), just precharged the brakes, but it actual brakes rather abruptly. Weird!

 

The collision warning will never activate the brakes.  I'm guessing that you probably got startled by the warning and subconsciously hit the brake pedal without even realizing it.



#10 OFFLINE   djminfll

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Posted 09 July 2013 - 11:25 AM

If the Adaptive Cruise Control is on, it will brake for you, it won't if its not on. If the pre-collision warning was activated, the system may have detected a vehicle in your path STRAIGHT AHEAD OF YOU, rather than reading the direction of the lane. Mine does it when I go around one particular curve on the expressway almost every time.

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#11 OFFLINE   hermans

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Posted 09 July 2013 - 11:30 AM

Mine went off the other day. Someone, was across the intersection from me and waiting to make a left turn and was already partially in the intersection.


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#12 OFFLINE   Riggo

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Posted 09 July 2013 - 01:40 PM

 

The collision warning will never activate the brakes.  I'm guessing that you probably got startled by the warning and subconsciously hit the brake pedal without even realizing it.

 

Haha uhhhhhh no. In fact, I was hitting the gas pedal trying to get it to speed up so people wouldn't run into the back of me. Maybe it was a malfuntion. I definitely didn't hit the brakes subconsciously and definitely didn't have cruise on.



#13 OFFLINE   Waldo

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Posted 09 July 2013 - 02:21 PM

 

Haha uhhhhhh no. In fact, I was hitting the gas pedal trying to get it to speed up so people wouldn't run into the back of me. Maybe it was a malfuntion. I definitely didn't hit the brakes subconsciously and definitely didn't have cruise on.

 

Kind of like the opposite of unintended acceleration.  People swear they are hitting the brake but they are actually hitting the gas.  It just doesn't have the ability to use the brake when there's a collision warning.  That would be like saying you tried to change the radio station and the brakes came on.  If it's a malfunction it's a MAJOR malfunction.


Edited by Waldo, 09 July 2013 - 02:22 PM.


#14 OFFLINE   Waldo

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Posted 09 July 2013 - 02:22 PM

Double post


Edited by Waldo, 09 July 2013 - 02:23 PM.


#15 OFFLINE   Riggo

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Posted 09 July 2013 - 09:56 PM

Yep. Seems to have been a major malfunction then. I've had the collision warning go off probably 7 or 8 times before so it doesn't startle me when it happens. I was going around the curve and it went off with my foot on the accelerator and started to slow down abruptly. That's when I tried to actually speed up because my foot was still on the accelerator. I knew how the system was supposed to work as you can see from an earlier post I has posted on this thread.

#16 OFFLINE   shaggy314

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Posted 10 July 2013 - 02:04 PM

Burried in the car manual describes pre-loading the brakes when the warning goes off so you have faster brake response. Adaptive CC will brake down to 20ish MPH.


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#17 OFFLINE   Riggo

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Posted 10 July 2013 - 02:39 PM

Yeah but does pre-loading the brakes actually cause a sudden decrease in speed? I thought pre-loading just meant the brakes were charged and ready to go at a much quicker response time, not that it would actually slow down the car. And since adaptive cruise wasn't on why would the car slow down.



#18 OFFLINE   acdii

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Posted 15 July 2013 - 12:50 PM

It was scared?    That is a puzzler, mine goes of a lot and has never slowed down. You probably didnt look, but if it did apply braking, your battery recharge would also be going. 


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#19 OFFLINE   Riggo

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Posted 15 July 2013 - 01:14 PM

Yeah mine has gone off a lot too and hasn't slowed down before. I was also going around a curve pretty slowly, it was a traffic circle in the middle of D.C. Weird. Maybe it was scared like you said, ha.



#20 OFFLINE   djminfll

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Posted 15 July 2013 - 01:49 PM

Mine only brakes when the ACC is on. I have had a couple of close calls where someone cut me off or blew a stop sign, and the strip of red lights in front of me flashed along with an audible alarm, but the brakes did not apply. It does, however, brake when the ACC is on. One of my pet peeves with the ACC is that the brakes will be applied sometimes if I'm in the middle lane and someone turns into the right lane, or if someone brakes in the right lane before making a turn. As I posted earlier in this thread, it always brakes when I am on the expressway at the same spot - the road is curving to the left and the system thinks I am driving straight ahead and am about to collide with the car in the right lane that is also curving left. I now release the ACC as I am approaching the curve, then resume once I am past it.


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