DarkStar
Posts: 2066
Joined: Sat Jul 17, 2010 10:06 am
Delivery Date: 25 Mar 2011
Leaf Number: 568
Location: Hillsboro, Oregon, USA
Contact: Website

Re: Grabby Brakes?

Okay, if you want to replicate this issue, here is my process.

1) Get on a slight forward decline.
2) Come to a complete stop.
3) Press down on the brakes a bit more.
4) Release the brakes just enough to roll just a tad.
5) Press harder on the brakes again.
6) Repeat 4 & 5 until the brakes are extremely grabby (usually only takes 1 or 2 cycles for me).

To stop the grabbyness, release the brakes completely for about 3 seconds and it will act normal once again. This is why I always thought it was caused by no more vacuum assist being available (or similar as pumping the brakes in an ABS vehicle in slick conditions).
Mikiko (2011 Nissan LEAF ETEC) Status:
Reserved: 04/20/10 | Ordered: 10/01/10 | EV Project Blink Installed: 03/22/11 | Delivered: 03/25/11 | VIN: 568

Oregon Electric Vehicle Association | Electric Auto Association
Christopher
Posts: 118
Joined: Thu May 05, 2011 4:51 pm
Delivery Date: 04 May 2011
Leaf Number: 1407
Location: Santa Cruz, CA
Contact: Website

Re: Grabby Brakes?

SanDust wrote:8000 miles and never noticed anything but perfect behavior. Surprisingly normal actually. However I don't drive in ECO. That could be one difference.
If what I am experiencing is the same thing (I'm not so sure), it's not about Eco mode as I'm in D not in Eco mode but I am moving at parking lot speeds.

I say I'm not sure it's the same thing because I first get a definite lack of response and have to compensate and then it becomes very grabby because it doesn't brake properly with normal pressure. Eventually it returns to normal.
Wattson
Posts: 9
Joined: Tue Nov 01, 2011 12:46 pm
Delivery Date: 04 Jun 2011
Leaf Number: 3879

Re: Grabby Brakes?

I posted a resolution to this on another thread, but figure I should post here too in case anyone missed it. I had the same issue for over 5000 miles - embarassing with passengers in the car.
The problem has something to do with the traction control and anti-lock brake system. To fix it do the following:
1) Turn on car and turn off the traction control (button on left side of driver)
2) Put in ECO (D might work too but I didn't try)
3) Drive forward a little
4) Press the brake pedal slowly and very firmly
5) Hold pedal down firmly for a good 30 seconds
6) Drive around the block to test
7) Put traction control back on

Hopefully this will fix the problem for you too, I've been grab-free for over 300 miles.
SDLeaf
Posts: 5
Joined: Fri Jan 14, 2011 5:48 pm

Re: Grabby Brakes?

I'm having the same issue.

I'm now about about 8900 miles and I noticed it starting about 3 months ago. In fact, just this weekend I took my car in for the recall/firmware update and kind of hoped that would solve the problem. Nope. The Nissan dealer guy who was driving my car out noticed it too and said "wow, those are really sensitive breaks!"

I've noticed it when in D mode (rarely drive in eco), but it doesn't seem to matter what the state of charge is. Aside from the first few brake uses, it does it almost all the time. My guess is that when the break is being used more, that something starts to go wonky.

I think I'll try the solution above and if that doesn't work, bring it in for a service and have them figure it out. At first I thought maybe my driving was just getting worse! But it's really annoying when in rush hour traffic and you start to break and then you lurch to a stop.

Has anyone else brough their Leaf in for this issue? What has the dealer said?
User avatar
LTLFTcomposite
Posts: 4780
Joined: Fri Apr 23, 2010 6:06 pm
Delivery Date: 10 Dec 2011
Leaf Number: 5926
Location: Central FL

Re: Grabby Brakes?

I too have seen this on occasion. Not so pronounced to call it a must fix.
LTL
White 2012 SV delivered 10 Dec 2011 returned 25 Nov 2014 replaced with stopgap ICE Sentra
[35 months] [35K miles] [9 Bars]
2013 Volt replaced after 36 months/30k miles with ICE Rogue
2016 SV-adjacent May 2016 lost 4th bar March 2018
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TomT
Posts: 10656
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: Grabby Brakes?

It seems to work for a short period but the problem quickly returns in my case... I've just learned to live with it and chalk it up to one of the cars many software quirks... My guess is that we will see it mysteriously get better in the 2013 model...
Wattson wrote:I posted a resolution to this on another thread, but figure I should post here too in case anyone missed it. I had the same issue for over 5000 miles - embarassing with passengers in the car.
The problem has something to do with the traction control and anti-lock brake system. To fix it do the following:
1) Turn on car and turn off the traction control (button on left side of driver)
2) Put in ECO (D might work too but I didn't try)
3) Drive forward a little
4) Press the brake pedal slowly and very firmly
5) Hold pedal down firmly for a good 30 seconds
6) Drive around the block to test
7) Put traction control back on

Hopefully this will fix the problem for you too, I've been grab-free for over 300 miles.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Tesla Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.
Wattson
Posts: 9
Joined: Tue Nov 01, 2011 12:46 pm
Delivery Date: 04 Jun 2011
Leaf Number: 3879

Re: Grabby Brakes?

I don't know if everyone is getting notice of Nissan's free software upgrade, but I did mine last week and the brakes feel pretty much normal now. The letter said nothing about the upgrade fixing this issue, but maybe they slipped in a tweak to the traction control routine.

Prior to this I was turning off traction control for a couple of miles once a month or so, to keep things normal.
User avatar
TomT
Posts: 10656
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: Grabby Brakes?

According to SDLeaf above, the software update made no difference in the braking operation of his car...
Wattson wrote:I don't know if everyone is getting notice of Nissan's free software upgrade, but I did mine last week and the brakes feel pretty much normal now. The letter said nothing about the upgrade fixing this issue, but maybe they slipped in a tweak to the traction control routine.
Last edited by TomT on Wed Feb 22, 2012 2:27 pm, edited 1 time in total.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Tesla Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.
ericsf
Posts: 358
Joined: Tue Sep 07, 2010 4:33 pm
Delivery Date: 05 Mar 2011
Leaf Number: 0428
Location: San Francisco

Re: Grabby Brakes?

I did the P1273 recall 2 weeks ago and since then I have not noticed the grabby brakes. It's a bit early but since this topic is hot I wonder if anybody has noticed this too.

Either the reprograming of the ECUs or the brake fluid replacement could have fixed that.

Considering that I didn't notice the grabby brakes for the first 6 months I owned the car and the fact that Nissan is recommending brake fluid replacement on the LEAF 4 times more frequently than on other cars (15K vs 60K) I tend to think it's the later. What do you guys think?
SL w/ QC (3/5/2011) - 11bars on 1/23/2014 @ 54k miles - 10 on 12/23/2014 @ 73k - 9 on 10/5/2015 @ 85k - 8 on 7/3/2016 @ 96k
IBELEAF
Posts: 1235
Joined: Wed Jul 07, 2010 5:23 pm
Delivery Date: 06 Apr 2011
Location: Seattle, WA

Re: Grabby Brakes?

Still grabby for me post update...
Currently: '12 Volt (12k) since 7/2012
Previously: '11 Leaf SL (w/ 12k miles & 16 month ownership)

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