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2016 Pre-collision system?
I've read a ton of pre collision threads here where everyone says that the system will not actually stop the car..
then there's this video.. and this one and this one.. Where it actually DOES fully stop the car.. So which one is it on the 2016 IS ? Anyone try this out with theirs yet? |
My understanding is that the PCS in the '16 ES and RX is the new system that can bring the car to a full stop. I have not read anywhere that the '16 IS gets the new system.
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According to the Lexus website for the IS the PCS is available but from the description it says it is designed to "automatically begin braking before impact." It doesn't say it will stop the vehicle. The RX page states it is "able to automatically begin braking before impact, and can even brake the vehicle to a stop at speeds above 6 mph."
http://www.lexus.com/models/IS/safety http://www.lexus.com/models/RX/safety So, not sure if they are the same system or not. Would have to see what the actual manual states. |
Okay, thanks for that info, looks like it won't stop us.. that's kinda lame, wonder if it can be updated with a SW update?
new question: I am not convinced my pre collision system is working. I have pretty much come flying up behind my mothers parked car and waited to even touch the brakes till way closer than I'd think where I should get a warning. On the 2014/2015/2016 - when do you get a warning? One other thing is that when the PCS button (under the steering wheel) is pushed and is in the IN position I get a "PCS" light on the dash. When it is OUT, no light. Could that mean that there's a problem? ie. which position is "ON" and which position is off? The radar cruise control works just fine. |
Originally Posted by J3ffrey
(Post 9268730)
Okay, thanks for that info, looks like it won't stop us.. that's kinda lame, wonder if it can be updated with a SW update? .
Regarding the light on the dash and the PCS switch - when the light is lit it means the PCS is disabled. |
Originally Posted by LeapFrog
(Post 9268736)
Most likely it could be, but you bought a Toyota... uh, Lexus product, not a Tesla. Unlike Tesla you will have to buy a new car to get the "new car features" such as full-stop-PCS. This is called 'savvy marketing'.
Regarding the light on the dash and the PCS switch - when the light is lit it means the PCS is disabled. I did have a car run a red light and go right across my path from right to left where I was doing 30 mph yesterday and I only missed him by inches.. I even had radar cruise control running at the time.. nobody was infront, just had it set at 30mph.. |
Originally Posted by J3ffrey
(Post 9268744)
Okay... so why isn't this thing yelling at me to BRAKE?
I did have a car run a red light and go right across my path from right to left where I was doing 30 mph yesterday and I only missed him by inches.. I even had radar cruise control running at the time.. nobody was infront, just had it set at 30mph.. |
Originally Posted by LeapFrog
(Post 9268749)
According to the "New car features" description of the Radar Cruise / PCS system it is designed for vehicle-to-vehicle following, not for cross-traffic collision detection. So you wouldn't have gotten an alert.
How about my mothers parked car that I've gotten up to 15 mph (like in the videos above) and waited till the last second to hit the brakes...and nothing happens. I know it sounds stupid to mess around like this but I want to make SURE the system works because this was one thing that attracted me to the car. people generally drive like idiots around here and I'd like the car watching out for me. I have felt no seatbelt tightening, no brake alert and for sure no brakes being pushed. I see people complaining about it being too aggressive, either they drive like crazy people or my pcs isn't working like it should be because I can't get it to even warn me, forget about actually hitting the brakes! Edit: I'm breaking out the owners manual now.. |
Originally Posted by J3ffrey
(Post 9268756)
How about my mothers parked car that I've gotten up to 15 mph (like in the videos above) and waited till the last second to hit the brakes...and nothing happens...
Edit: Just looked in the manual and the > 19 mph figure applies to the PCS brake assist. You should get pre-collision braking if PCS is enabled and the closing speed is > 10 mph. If that isn't happening then indeed maybe you have a fault in the system. |
Here's what the manual has to say just for future users:
■ The pre-collision system is operational when The pre-collision system is enabled and the following conditions are met: ● Pre-collision warning: • Vehicle speed is greater than about 10 mph (15 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 10 mph (15 km/h). ● Pre-collision brake assist: • The VSC system is not disabled. • Vehicle speed is greater than about 19 mph (30 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 19 mph (30 km/h). • The brake pedal is depressed. ● Pre-collision braking: • The VSC system is not disabled. • Vehicle speed is greater than about 10 mph (15 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 10 mph (15 km/h). ● Suspension control (vehicles with Adaptive Variable Suspension System): • Vehicle speed is greater than about 4 mph (5 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 19 mph (30 km/h). ■ Conditions that may trigger the system even if there is no danger of a collision In any of the following situations where the frontal area of the radar sensor is interrupted, the radar sensor may detect possibility of a frontal collision and the system may be activated. ● When passing by an oncoming vehicle in a curve or a turn to the right or the left. ● When rapidly approaching an obstacle ahead (e.g. preceding vehicle, toll gate barrier, etc.) ● When there is a structural object (billboard, low ceiling, fluorescent light, etc.) above the uphill road ahead ● When driving on a narrow road or through under a low overhead structure (bridge, tunnel, fly-under, etc.) ● When driving on an uneven road surface ● When there is a metal object, bump, or protrusion on the road surface ● When vehicle’s front part is raised or lowered depending on loading conditions ● When the direction of radar sensor is misaligned by strong impact applied on an area around the radar sensor, etc. ● When there is an obstacle (guard rail, etc.) by the roadside at the entrance to a curve ● When the front of your vehicle is pointing upwards (caused by putting a heavy load in the trunk etc.) When the system is activated in the situations described above, there is also a possibility that the brakes may be applied with a force greater than normal. 258 4-5. Using the driving support systems IS350/300/200t_U (OM53D18U) ■ Obstacles not detected The sensor cannot detect plastic obstacles such as traffic cones. There may also be occasions when the sensor cannot detect pedestrians, animals, bicycles, motorcycles, trees, or snowdrifts. ■ Situations in which the pre-collision system does not function properly The system may not function effectively in situations such as the following: ● On roads with sharp bends or uneven surfaces ● If a vehicle suddenly moves in front of your vehicle, such as at an intersection ● If a vehicle suddenly cuts in front of your vehicle, such as when overtaking ● In inclement weather such as heavy rain, fog, snow or sand storms ● If the vehicle is skidding when VSC is not operating ● When your vehicle is steeply inclined ● When only part of your vehicle’s front end collides with, or contacts, a vehicle or object in a frontal collision ● When the radar sensor moves off position due to its surrounding area being subjected to a strong impact ● When an obstacle suddenly appears in front of the vehicle due to the steering wheel being turned sharply or another cause ■ Automatic cancelation of the pre-collision system When a malfunction occurs due to sensor contamination, etc. that results in the sensors being unable to detect obstacles, the pre-collision system will be automatically disabled. In this case, the system will not activate even if there is a collision possibility. ■ When there is a malfunction in the system or if the system is temporarily unusable The pre-collision system warning light will flash and warning messages will be displayed. ■ Limitations of the pre-collision system ● The driver is solely responsible for safe driving. Always drive safely, taking care to observe your surroundings. Do not use the pre-collision system instead of normal braking operations under any circumstances. This system will not prevent collisions or lessen damage or injuries in all cases. Do not overly rely on this system. Failure to do so may cause an accident, resulting in death or serious injury. This system has been designed to help avoid and reduce the impact of collisions. However, the system operates differently depending on the situation (P. 257, 258). As a result, the same level of performance may not be expected in all cases. Also, the pre-collision brakes may not operate if the driver is depressing the brake pedal or turning the steering wheel, as the system will determine such conditions as collision avoidance operations. ● As the pre-collision system is designed to assist the driver in safe driving, it may operate under sporty driving conditions, which may cause an accident. For this reason under sporty driving conditions, it is recommended that this system be disabled by using the PCS OFF switch. ■ Handling the radar sensor Observe the following to ensure the pre-collision system can function effectively. Otherwise, the system may not function correctly and could result in an accident. ● Keep the sensor and grille cover clean at all times. Clean the sensor and grille cover with a soft cloth so you do not mark or damage them. ● Do not subject the sensor or surrounding area to a strong impact. If the sensor moves even slightly off position, the system may become inaccurate or malfunction. If the sensor or surrounding area is subject to a strong impact, always have the area inspected and adjusted by your Lexus dealer. ● Do not disassemble the sensor. ● Do not attach accessories or stickers to the sensor, grille cover or surrounding area. ● Do not modify or paint the sensor and grille cover. ● If the radar sensor needs to be replaced, contact your Lexus dealer. ■ Cautions regarding the assist contents of the system By means of alarms and brake control, the pre-collision system is intended to assist the driver in avoiding collisions through the process of LOOK-JUDGE-ACT. There are limits to the degree of assistance the system can provide, so please keep in mind the following important points. ● Assisting the driver in watching the road The pre-collision system is only able to detect obstacles directly in front of the vehicle, and only within a limited range. It is not a mechanism that allows careless or inattentive driving, and it is not a system that can assist the driver in low-visibility conditions. It is still necessary for the driver to pay close attention to the vehicle’s surroundings. ● Assisting the driver in making correct judgment When attempting to estimate the possibility of a collision, the only data available to the pre-collision system is that from obstacles it has detected directly in front of the vehicle. Therefore, it is absolutely necessary for the driver to remain vigilant and to determine whether or not there is a possibility of collision in any given situation. ● Assisting the driver in taking action The pre-collision system's braking assist feature is designed to help reduce the severity of a collision, and so only acts when the system has judged that a collision is unavoidable. This system is not capable of automatically avoiding a collision or bringing the vehicle to a stop safely without appropriate operations performed by the driver. For this reason, when encountering a dangerous situation the driver must take direct and immediate action in order to ensure the safety of all involved. |
Originally Posted by J3ffrey
(Post 9268773)
I guess the people having problems with the system might just be lunatics behind the wheel :) (jk)... maybe it's a good thing I can't get it to warn me, I must just be too cautious? I have no lights on the dash.
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In my experience, the system will warn you just before a collision is imminent and brake only when a collision is unavoidable. I prefer the system to operate this way because it probably reduces false alerts. There's also been reports on CL community where the system has inadvertently braked where it shouldn't have.
If you want to test the system (not recommended), find somewhere that has a guardrail or metal barricade at the end of lane (like a merge lane). There is a particular spot I drive by often and I can always get it warn me here if I don't shift lanes sooner. Keep in mind, this is a reactive safety feature on the IS that isn't intended to prevent a collision, but rather to mitigate the effects of a severe collision. i.e., it may save your life, but your legs may still be broken. |
Thanks,
I actually did get it to work so it's cool. What my sister and I did was take her car (beater) and got up over 27 mph (where adaptive cruise control starts working). Her max speed was 35. She slowed down fast and stopped... the car immediately started to slow and hit the brakes hard, then as we went under 27 it beeped twice to let me know it was going to release the brakes and I was on my own, but it didn't seem to actually release the brakes all the way, instead I got the BRAKE warning light and then I hit the brakes.. had plenty of time to avoid collision. So that's good. :) I hope to only see that warning light when it's really needed again. On a side note I think the radar cruise control is actually helping me to be a better driver, at least on the highway. For some reason when you set the thing at 70 (with three bars) and you don't have to sit there and worry about the gas pedal it's a less stressful drive. I can't wait for a self driving lexus to hit the road! |
I have piled up boxes and hung cushions, and driven my car directly into them and my car didn't break at all. I did the experiment twice, exactly the same both times. One time I got the brake warning and beeping but no breaks, and the next time nothing. I hit hit the boxes both times. I went to the service center at the dealership and told them the problem and they said they had no way to diagnose the problem without a light coming on to indicate that I have a problem. So what do I do?
I guess the people having problems with the system might just be lunatics behind the wheel :) (jk)... maybe it's a good thing I can't get it to warn me, I must just be too cautious? I have no lights on the dash.[/QUOTE] |
Pcs....not breaking
I have piled up boxes and hung cushions, and driven my car directly into them and my car didn't break at all. I did the experiment twice, exactly the same both times. One time I got the brake warning and beeping but no breaks, and the next time nothing. I hit hit the boxes both times. I went to the service center at the dealership and told them the problem and they said they had no way to diagnose the problem without a light coming on to indicate that I have a problem. So what do I do?
I guess the people having problems with the system might just be lunatics behind the wheel :) (jk)... maybe it's a good thing I can't get it to warn me, I must just be too cautious? I have no lights on the dash.[/QUOTE] |
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