OakLeaf
Posts: 119
Joined: Tue Dec 11, 2012 1:00 pm
Delivery Date: 21 Nov 2012
Location: Telford, PA

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Mon Jul 29, 2019 8:23 pm

BrockWI wrote:
Tue May 21, 2019 6:33 am
Stole from another thread, but it works for me, I do this about once a month.
Grabby at high or low speeds? There's a (temporary?) fix if it happens at low, which is: Turn off traction control, inch forward, hold and press down the brakes FULLY for about 30 seconds. That's it. Mine used to be super grabby on/off style at low speeds, but now they're normal.

Our 2012 has had this issue for years as well and this trick cures it for a while.

What seems to bring the bad behavior back is when the traction control kicks in while traveling over bumpy surfaces where one wheel will leave the road surface and spin separate from the other tire, such as when going over a pothole, manhole cover or in particular for me, this one set of railroad tracks. Traction control events due to simple slippage as on ice or snow do not seem to cause this braking issue.
2012 Leaf SL - 75K miles since 11/2012 - No P3227 Update - 7 Bars / 36.48AHr / SOH 55.61% / Hx 48.12%

Valdemar
Posts: 2665
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Mon Jul 29, 2019 11:17 pm

Wasn't there a TSB about it and a corresponding ECU update?
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB), -1CB(53.92Ahr)@140k/29mo,
51.1AHr, SOH 80%, 150k miles

9kW Solar

LeftieBiker
Moderator
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Mon Jul 29, 2019 11:44 pm

Valdemar wrote:
Mon Jul 29, 2019 11:17 pm
Wasn't there a TSB about it and a corresponding ECU update?


Yes, but it may have been for the 2013+ cars. I don't remember for sure.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Valdemar
Posts: 2665
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Tue Jul 30, 2019 2:37 pm

LeftieBiker wrote:
Mon Jul 29, 2019 11:44 pm
Valdemar wrote:
Mon Jul 29, 2019 11:17 pm
Wasn't there a TSB about it and a corresponding ECU update?


Yes, but it may have been for the 2013+ cars. I don't remember for sure.
I had it applied on 2011 and it brought an improvement, but it is not a complete cure. My brakes are grabby every now and then up to this day.
viewtopic.php?t=10239
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB), -1CB(53.92Ahr)@140k/29mo,
51.1AHr, SOH 80%, 150k miles

9kW Solar

Robroy
Posts: 1
Joined: Mon Jan 27, 2020 4:25 am
Delivery Date: 27 Jan 2020

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Mon Jan 27, 2020 5:34 am

I've had exactly the same problem since I bought my leaf 2 years ago, a problem that the dealership mechanics always denied :evil: So I decided to take the brakes apart myself and have a look. What I found was locked up brake pads owing to fact that the showroom mechanics don't actually service the brakes, they 'check' them, meaning they only look at the wear of the pads and discs. So my advise would be to get a proper service done on your brakes, either by yourself, or by a trusted local mechanic, because the dealership service is a rip off.

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Marktm
Gold Member
Posts: 603
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737
Location: Houston, TX

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Thu Apr 30, 2020 6:28 pm

Periodically, my 2012 will start "lurching" during braking - especially when just enough braking is applied to maximize regen. At times, the final "stop" of braking also grabbed excessively - only during the final few feet of stopping. The U1511 0108 and U1232 0108 both had been thrown.

Anecdotally;
I tried the "put the brake to floor for 30 seconds" technique and it did seem to help the "grab" at stopping, but no affect on the surge/lurge at speed. I then measured the settled 12 volt system voltage at 12.4 volts - very low for a FLA battery - so definitely in need of an external recharge. Over last weekend, I set up 2, 2 amp chargers and let them charge. I finished with a 15 amp (40 year old) charger for a day. The result is NO SURGE, NO LURCH - yet. No "grab" either. At first sign of any return surge, I'll measure the settled voltage again, and recharge again. We'll see :mrgreen:
2012 Leaf SL; 46,000 miles. Battery replaced November 1st, 2016.

powersurge
Posts: 1743
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Fri May 01, 2020 6:45 am

I have never heard about a "brake recalibration" It is not an electrical or computer thing....

I am concerned that you switch from drive to neutral every block... There is no need to play with the transmission like that.

If you have a 2012, you should have the brake fluid changed an make sure that the front and rear rotors are smooth and not pitted or scratched.

If there is a lot of scraping on the rotor, you could put on new ones, but that will be $300-400.

I say tolerate that your car is getting old.... Like you...

69800
Posts: 173
Joined: Fri Dec 30, 2011 2:21 pm
Delivery Date: 03 Jan 2012
Leaf Number: 16583
Location: North Idaho

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Tue May 05, 2020 8:35 am

I replace the rotors and problem solved
2012 SV Delivered Jan 2012
DOM 10/11 Sequence 16583
58000 miles. Aug 21 2020
Leaf Spy Pro
New Battery Aug 21 2020

powersurge
Posts: 1743
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Tue May 05, 2020 10:48 am

69800 wrote:
Tue May 05, 2020 8:35 am
I replace the rotors and problem solved
That's what I do. $40-50 per rotor and a little labor

Most people have to plan that replacing rotors will cost $$$

User avatar
Marktm
Gold Member
Posts: 603
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737
Location: Houston, TX

Re: Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Le

Wed May 13, 2020 3:02 pm

Not wanting to start a "lurch" war, but I've had years of Chevy Suburban bad/warped rotors and know exactly how that "cycle" feels - at essentially every braking event above certain speeds. The regen/braking "lurch" of my Leaf is very different and distinctive as it cycles at much less frequency than a warped rotor. Again, it's anecdotal, but twice I've been able to completely eliminate the "lurch" by charging up the 12 volt system - and totally eliminates the problem - for a while!

How that regen "lurch" is generated - no idea :mrgreen:
2012 Leaf SL; 46,000 miles. Battery replaced November 1st, 2016.

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