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Anyone actually get Overtake Acceleration on TACC working?

Discussion in 'Model 3' started by holmgang, Jul 7, 2020.

  1. holmgang

    holmgang Active Member

    Joined:
    Sep 9, 2019
    Messages:
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    Location:
    eu
    I have 2020 model with 2020.20.12

    If im trailing a car below my TACC speed, and the left lane is clear, I want to signal left and have the car speed up to overtake (while manually controlling steering)

    This is from the manual:

    Overtake Acceleration
    When following a vehicle with Traffic-Aware
    Cruise Control active, briefly engaging the
    turn signal (to indicate a move into the
    passing lane) accelerates Model 3 towards the
    vehicle ahead.
    By momentarily holding the
    turn signal lever up or down, you can quickly
    accelerate up to your set speed without
    having to press the accelerator pedal.
    The turn
    signal causes acceleration only when all of the
    following conditions are met:
    • Traffic-Aware Cruise Control is operating
    and detects a vehicle in front of you.
    • No obstacles or vehicles are detected in
    the target lane.
    • Model 3 is traveling below the set speed,
    but over 72 km/h.​



    But whether I hold down the stalk at half-press or full-press, the car either stays at the same speed or slows down. If im going at 100kph limited by the car ahead with TACC set at 130kph, and the left lane is indicated and its clear, the car simply wont accelerate to 130kph..... sorta annoying
     
  2. Ravire

    Ravire Member

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    I know that the stock has to be held at half-press and people have gotten it to work but personally I’ve never tried it I’ll give it a shot tomorrow
     
  3. TomT

    TomT Technical Maven

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    NE Georgia
    Frankly, I find using the accelerator to be easier and to give better control... Using the turn signal is just too gimmicky and imprecise for me.
     
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  4. jpfive

    jpfive Supporting Member

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    Mine works the same as the adaptive cruise on my Buick. It will slow down to match the speed of a vehicle that I am overtaking. However, it maintains its base speed setting in memory. If I move into an unobstructed passing lane it accelerates back to this base speed and maintains it. Nothing more, nothing less. I use the turn signal only as the common courtesy for signaling the lane change.
     
  5. WattsappMTL

    WattsappMTL Member

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    Montreal
    I just posted my similar experience on Tesla forum and got only one unhelpful response. Based on OP's comments, I'm not the only one having problems with this feature but I'm surprised there isn't more pushback on getting it working properly. What I expected is like the behaviour of my previous Subaru Forester with Eyesight - as soon as I selected the turn signal, it would disregard the conflicting traffic ahead and begin to accelerate toward my set cruise speed as I started to change lanes. As described in the manual, this features should make TACC behave just like my own driving style, but the way it works now feels very strange.

    Since I received my 2021 Model Y with basic autopilot in November, the Overtake Acceleration feature described on page 87 of the latest (Oct/20) owner's manual has never worked for me. I carefully followed the prescribed procedure but every time the car does not accelerate until it fully reaches the middle of the passing lane. I finally raised a service report and submitted multiple time stamp examples of these failures. All of my examples were reviewed and in most cases the required conditions were met but for each one, Tesla found a reason that the Overtake Acceleration did not activate. In the end, they closed the service request.

    I actually think that TACC should be looking into the target lane and adjusting speed accordingly as soon as the flasher is engaged. If for some reason I pull in behind another car going slower than me, TACC allows me to close on it until I am in the same lane, then decelerates aggressively if my following distance has gone below the default setting. I usually have to disengage autopilot to avoid this sudden braking.

    Before banging my head against the wall with Tesla again, I'd like to request some feedback from the community. Does this feature work as described on your vehicle? If so, do you have basic AP or FSD? TIA for your input.
     
  6. LACALawyer

    LACALawyer Banned

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    Anyone familiar with the old story about America spending millions to develop a pen that will work in the micro-gravity of earth orbit, and the Russians just used pencils instead?

    That's why I use the accelerator....
     
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  7. WattsappMTL

    WattsappMTL Member

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    Sure, it's the easiest way - as long as you don't mind the pop-up warning that emergency braking might not work. I'd still prefer the car to work as it's supposed to!
     
    • Like x 1
  8. momo3605

    momo3605 Member

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    I think Overtake Acceleration only works if you have Enhanced Autopilot or FSD. My old SR+ with autopilot wouldn’t do it.l from what I remember. But my LR with FSD does start to accelerate when I hit the turn signal. But idk maybe I’m wrong.
     
    • Like x 1
  9. Trilodroid

    Trilodroid Member

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    Wondering if the following distance has something to do with this feature. Does it act the same on minimal follow distance vs. max? If I think about it I will test mine out, got a '21 with 3 months of FSD so... worth a test.

    What I can tell you, not very related, is when I drive on the interstate and have AP FSD engaged, and I turn on the signal/blinker to change a lane... it very comfortably lets me take over the steering wheel (disengaging auto steer) and accelerator myself. I did this several times on day one, not remembering I had FSD and not really knowing what I was doing. But when I try to disengage autosteer at high speeds with AP FSD engaged but do not signal, I have to jerk the steering wheel over pretty hard and uncomfortably. One time I just wanted to avoid a pothole with auto steer engaged, and it was just very tricky to do at the last second. Don't know where I'm going with this, b/c I love autosteer on straight interstates in general.

    I did several tests with no other vehicles around to change lanes on the interstate, and it does it with the blinker just fine. I know this isn't helpful to your question, just relaying what I've seen so far. Interested in if people can find a way to get it to accelerate consistently.
     
  10. WattsappMTL

    WattsappMTL Member

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    Thanks - that's one explanation that I suspected, but Tesla Service still looked into my report without any mention of needing FSD for this function to be active, and the owner's manual doesn't suggest this either. In my view it's an essential element of a basic ACC system.
     
  11. WattsappMTL

    WattsappMTL Member

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    I have played with autosteer and it requires full signal (not momentary position) in order to reduce the autosteer disengagement force. It's still the steering wheel movement that disengages autosteer, but if you signal the disengagement is smooth. I agree that if you don't signal (or only push the stalk against the spring) the car will jerk when it disengages. TACC speed control stays active throughout - it only disengages with a brake pedal push or upward movement of the right steering column stalk.
     
  12. jsmay311

    jsmay311 Active Member

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    Apologies for being a nitpicker... I know this post wasn't meant to be overly serious, and many people realize this story is just a mostly-harmless parable... but others take it at face value.

    FACT CHECK: NASA's 'Astronaut Pen'
     
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  13. Arpe

    Arpe Member

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    Dec 27, 2017
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    Denmark
    Same as Momo here. After we got FSD the Model 3 speeds up as it changes lane. Before FSD it didn't do anything before being well into the new lane.
     
  14. Peteski

    Peteski Active Member

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    That’s interesting to note. I’ll see if mine will do that next time. I’ve never been impressed with auto-lane change in either of our Teslas and never thought the accel to overtake function ever worked. For me it just meanders across the lane and then starts to speed up. If it speeds up before or during the lane change then I haven’t really noticed.
     

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