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: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Fri Mar 23, 2012 6:37 am

EVDrive wrote:My brakes are defiately grabby when I am at a 100% charge level... when the regen doesn't yet work. My solution is to adjust how much pressure I put on my breaks using only gentle pressure and their is no problem. I try to avoid using my friction breaks and prefer to just coast to a stop. I'm not even a hyper miler, more of an aggressive driver.

What I am wondering is why the heavy use of the breaks from the posters on this thread? I can see how others might get annoyed by this quirk but it doesn't bother me. I defiately have breaked and said WTF a few times though.

For me the ok to track your every move screen is way more annoying.
I know the hypermilers say you never use the brakes but I don't know how to navigate through a parking lot that way. I can't run over an old lady who stepped in front of me just to save a few watts. The amount of pressure we are applying IS very light... but the amount of braking force is not proportional. A very light touch can result in a very forceful application of braking force. Maybe it is dependent on charge level, but if it is, that is a problem. I would think whatever electronics, motors, servos or whatever are powered in the 12V side, so charge level makes no sense from that standpoint. An the idea that the braking algorithms use some input from SOC level makes no sense to me either.
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

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: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Fri Mar 23, 2012 6:40 am

Herm wrote:
TRONZ wrote: Yes. They said the brake fluid could use a flush (ya, right! My brain screamed).
You can test your own brake fluid easily at home, using test strips made for that.. for about $30 you can get a lifetime supply (25 strips) unless you have 5 cars at home :)

Just test the fluid as part of your yearly maintenance ritual.. Here are two brands, just go visit a professional auto parts store (not Discount Auto Parts).. flushing your own fluid is also easy to do:

http://www.gwrauto.com/stripdip.htm" onclick="window.open(this.href);return false;
Good tip, but this car is only three months old. The braking system should not require any maintenance for three years, and if it does it needs to be on Nissan's dime.
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

User avatar
evnow
Moderator
Posts: 11480
Joined: Thu Apr 22, 2010 11:41 am
Delivery Date: 25 Feb 2011
Leaf Number: 303
Location: Seattle, WA

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Fri Mar 23, 2012 8:27 am

GaslessInSeattle wrote:our 2011 had the grabbing breaks on occasion, our 2012 does not have a hint of it, at least not yet. Is this issue restricted to the 2011?
Upgraded ? Sold your old one ?
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

User avatar
TomT
Posts: 10650
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Fri Mar 23, 2012 8:35 am

Nor through barely moving, bumper to bumper, stop and go traffic, which is where the problem really rears its ugly head! By the way, I've driven a 2012 and the problem is still present to the same degree in that model year...
LTLFTcomposite wrote:I know the hypermilers say you never use the brakes but I don't know how to navigate through a parking lot that way.
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.

georides
Posts: 5
Joined: Wed Mar 21, 2012 7:11 pm
Delivery Date: 21 Mar 2012
Contact: Website

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Fri Mar 23, 2012 6:14 pm

I checked the Nissan ASSIST terminal at work today to see if there are any TSBs (Nissan solutions to known issues) with the LEAF in regards to the brakes. I couldn't find anything particular, besides the standard ABS Noise TSB that applies to all Nissan cars.

In terms of Nissan brakes in general, we have a lot of cars that need brakes in the first 10K miles because of pulsation/noise/"sticking" (as in a jerky/popping not smooth stop). My idea is that when the cars sit on the lot the rotors rust and so they tend to not wear exactly even. Around here with our 50 MPH strips and Garden State Parkway the brakes get a trashing. There's plenty of pad left, but the rotors require refinishing ("cut") and new pads installed. But this is the reality with any car that sits for months. I parked my car for two weeks near the ocean once and my rear drum brakes were stuck and my fronts were never the same. Cars like to be driven, bottom line.

As for the brake flush, most manufacturers recommend it every 2 years because the fluid absorbs moisture and this can give a spongy pedal. A lot of customers never do it, and get through years without a prob. I'll definitely be doing it on my LEAF if I own it.
ASE Certified Master Tech/Emission Repair
EV/GT-R Nissan Dealer in NJ
Soon to sign a LEAF lease!

REFFY
Posts: 4
Joined: Fri Oct 08, 2010 11:07 am

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Mon Apr 02, 2012 11:03 am

Hi, Yeah got a 2011 in October 2011 and the grabby brake problem showed up about 1,000 in. It's pretty shocking when it happens creeping along in traffic, but as mentioned, it is inconsistent. Took the car in for the software update and mentioned the problem, but got the deer in the headlight look. Haven't'contacted CS yet but should. Just hoping the problem will resolve itself or some recall is announced. It is definately a problem.

FairwoodRed
Posts: 459
Joined: Wed May 18, 2011 10:25 am
Location: Fairwood, WA

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Mon Apr 02, 2012 12:17 pm

REFFY wrote:... and mentioned the problem, but got the deer in the headlight look...

There, I fixed it for ya!
... and mentioned the problem, but got the dealer in the headlight look...

KJD
Posts: 1348
Joined: Sat Jan 22, 2011 11:06 am
Delivery Date: 08 Dec 2011
Leaf Number: 15656
Location: SLC, UT
Contact: Website

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Mon Apr 02, 2012 12:47 pm

LTLFTcomposite wrote: It is important that everyone experiencing this problem call customer service and alert them, as it is the number of reports that will drive them to debug the problem and come up with a fix.
My 2012 had this problem for the first couple of months.

One Saturday I drove it up to the local ski resort (Brighton). Driving down the mountain gave the brakes a good workout.

Next day I drove the car up a different canyon just to check out it in the S curves. Again the brakes got a good workout driving back home.

No more grabby brake problem, they work perfect now.

KJD
2012 SL Delivered 12/08/2011
Sold 05/12/2015
2012 Tesla Model S 85

garsh
Posts: 1173
Joined: Sat Feb 12, 2011 5:27 am
Delivery Date: 05 Apr 2012
Location: Pittsburgh PA

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Mon Apr 02, 2012 3:07 pm

I know my current ICE vehicle will get a little rust buildup on the brake discs after I wash the wheels. When I go to drive it the next morning after washing it, I'll get some extra noise for a little while until the pads rub off the rust buildup.

Given that an EV uses mostly regenerative braking, could we be seeing something similar happening here, just more extreme?
2012 Black SV, bought 2012-04-04, sold 2019-05-10. 7 bars, 101,850 miles.
Current rides: 2018 Tesla Model 3 Performance, 2018 Chevrolet Volt LT

User avatar
RegGuheert
Posts: 6419
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: PLEASE CALL CS IF YOU HAVE HAD PROBLEMS WITH GRABBY BRAK

Mon Apr 02, 2012 3:10 pm

KJD wrote:Driving down the mountain gave the brakes a good workout.
KJD wrote:Again the brakes got a good workout driving back home.
What?!!! Do you mean to tell us that you used YOUR BRAKES to convert the kinetic energy of your LEAF directly into HEAT?!!! And on multiple occasions, no less!!

I'm sorry, but because of this VERY GRAVE and REPEATED infraction of the EV Owners Code of Conduct, I will have to ask you to turn in your membership card.

:D

Oh, BTW, thanks for the tip on how to fix the grabby brakes problem!
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

Return to “Engineering”