The vehicle owner's manual (which so many people fail to fully read) has the correct operating information for the systems. The lane departure warning system operates independently of the forward collision warning system, and at 35 mph or higher, and can be turned off. I suspect the Terrain has the same operating parameters. The vehicle manual for my 2014 Impala 2LTZ states that the "brake preparation" is only activated when the vehicle has the active emergency braking system activated (not the forward collision alert system). Some systems can detect the quick accelerator pedal lift, and also pre-charges the braking system (such as in a panic stop situation). The forward collision alert system may pre-charge the brake system, (bringing the brake pads closer to the rotors), but it does not cause a "jerking" of the vehicle. I tire of these systems as they are only in my opinion making bad drivers even worse as they do not attain much of any skill driving. The lane deal is good on the interstate but on back narrow roads it also presents many false signals. Note this system was the first thing my wife wanted turned off in our. As time goes on the radar systems will become cheaper and standard even on the lower priced cars. The bottom line is this is a cheap system that yes it does work but not very well. What it is intended to do is speed up reaction time in applying the brakes as they already have some pressure applied as well as already having the anti lock system already activated. What that means is the anti lock system is activated when the system detects a close or closing object and it applies some pressure to the brake system. If you do not step on the brake it will not stop.īut yes the system pre-charges the anti lock brake system. Both of you are correct, No the brakes are not actively applied to stop the vehicle like in many high end cars. But the price you pay is a system that detects more false signals or in this case images.Īs for the vehicles reaction. GM has been using the camera system as it is cheaper to use vs. The Camera in the windshield though can pick up false images and react the system in a false way. The system here is a visual system so you did not have any electromagnetic interference.
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