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  1. #1
    Summer Leafer ukwizard's Avatar
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    Grabby Brakes / Difficulty coming to a smooth stop

    In my 2013 Tekna it can be hard to come to a smooth stop at lights etc as the brakes just seem to engage on full right before you come to a complete stop. The brake pedal pressure can remain constant, the car slows right down (or coasts to a very slow speed), then right before the stop the car applies the brakes fully and the car jerks to a stop. Stop more aggressively and the problem doesn't seem to be there.

    Is anyone else seeing this, I've done a google search and elsewhere people seemed to have some issues on the Gen 1 but those seem to go back to 2011/12 and were addressed by Nissan but nothing mentions the Gen 2 / 2013 car.

    Im guessing its the switch from regen braking to the friction brakes but it can be quite aggressive! It also sometimes seems worse than others, first thing in the morning at the end of the road is definitely a seat belt test, while after a long run the brakes seem fine and normal.

  2. #2
    Leaf Addict RichardW's Avatar
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Yes, I have the same.
    You have to be extremely precise to get a smooth stop from about 2 or 3 mph.
    Quite often it feels like someone stomping on the brake pedal.

    A bit less pressure on the brake pedal and it continues to roll forwards.

    I'm not sure it's the switch from regen, as you don't seem to get much/any under approximate 8mph.
    Possibly it's the car trying to over-ride the creep function like an automatic ICE has?
    Ex-owner of a Gen1 and Gen2 LEAF.
    Also ran a KIA Soul EV.
    Now in a Tesla Model S 90D.
    We also run a number of LEAF and KIA Soul EV at work.


  3. #3
    Summer Leafer
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Identical and mine is a week old, only happens in "B"
    i tend to drop out of "B" in traffic otherwise its far too much effort
    2015 Tesla Model S P85D AP1 DC Prem
    Oct 2013: Metallic Gun Metal Tekna - SOLD
    @dodavies

  4. #4
    Committed Leafer
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    My Gen 1 still does this so wouldn't describe it as having been addressed.

  5. #5
    Committed Leafer Colin's Avatar
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Just had a 5 day test in a 13 Tekna with 3500 miles and found no issues with braking in any mode.
    Take it to the dealer to be checked.

  6. #6
    Committed Leafer EcoSkene's Avatar
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Mine used to do this in the early days for first 1000 miles or so but after that it was fine

  7. #7
    Summer Leafer
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Just to update this thread:

    This problem is absolutely doing my nut in after 4000 miles. Jerky Jerky Jerky all the time. I like beef jerky, but not braking jerky.

    I'm a smooth braker in a conventional car and the low speed traffic behaviour of my Leaf on the brakes at low speed is embarrassing. I'm constantly making excuses to the people I take out for rides in it! It spoils what is an otherwise amazing car.

    Am I missing something? is this a consequence of B mode?

  8. #8
    Summer Leafer ukwizard's Avatar
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Is still happening to me too, and my wife. I drive in B and my wife uses D so it can't have anything to do with that.

  9. #9
    Summer Leafer Mattcarr's Avatar
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    This is something that we experience when coming out of the end of the driveway, slow speeds, trying to creep forward slowly - it is like the car is trying to go between using the motor to slow and blending in the friction brakes. I find that if I am slowing from speed down to a stop then it is perfectly smooth right until I stop. We only tend to see this behaviour when moving very slowly, slower than the creep function.
    September 2013 Pearl White Nissan Leaf Acenta
    Trying to decide to keep it, get a new one or walk away !!

  10. #10
    Summer Leafer
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    Re: Grabby Brakes / Difficulty coming to a smooth stop

    Quote Originally Posted by Mattcarr View Post
    This is something that we experience when coming out of the end of the driveway, slow speeds, trying to creep forward slowly - it is like the car is trying to go between using the motor to slow and blending in the friction brakes. I find that if I am slowing from speed down to a stop then it is perfectly smooth right until I stop. We only tend to see this behaviour when moving very slowly, slower than the creep function.
    The theory I have in my head is as richardW has.... theorised?

    The actual calliper pressure is at a constant for a constant pedal position, but as the speed drops below a threshold value, the creep stops?

    So the pressure being applied is immediately enough to induce a sudden graunch as soon as the creep inertia is taken away.

    I do wonder what additional wear this grab-braking is causing on the braking components & the bushings etc.

    Each time I've managed to come to a smooth stop, I've made an effort to remember the pressure inputs to do it again... but it never works!


 
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