brycenesbitt
Posts: 111
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

Is it possible to adjust transition from regen to friction brake (lurch during an otherwise smooth stop with 2011 Leaf)

Mon May 20, 2019 12:13 pm

I have a 2011 Leaf, and more and more, I can detect the switch from regeneration to friction braking.

This leaf only sees city duty, due to a worn out battery at 37000 miles. I normally coast in neutral between lights, then switch to ECO/B mode, then as needed apply the brakes. This is all smooth. But at some point near 4-5 mph there's a grab, which I interpret as the friction brakes kicking in.

Is there a way for a qualified mechanic to adjust the switchover point, and make the braking smooth again?
Last edited by brycenesbitt on Mon May 20, 2019 10:52 pm, edited 1 time in total.

cwerdna
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Location: SF Bay Area, CA

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

Mon May 20, 2019 12:22 pm

B mode? I thought that didn’t arrive until ‘13 SV and SL.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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Nubo
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Location: Vallejo, CA

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

Mon May 20, 2019 5:41 pm

brycenesbitt wrote:IBut at some point near 4-5 mph there's a grab, which I interpret as the friction brakes kicking in.

Is there a way for a qualified mechanic to adjust the switchover point, and make the braking smooth again?


Your LEAF might benefit from re-calibrating the brake control unit. Bring the vehicle to a stop, and hold the brake pedal all the way to the floor, and keep it there for a full 30 seconds. You may find your braking smoother after that.
I noticed you're still working with polymers.

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

Mon May 20, 2019 6:07 pm

2011 did not have B mode, just D and ECO. The "recalibration" that Nubo suggested may help. There were also a couple other brake "recalibration" procedures that the early adopters discovered, but it has been too long since the 2011 was totaled so I cannot remember them (but I remember that they did improve the issue you describe). Try searching the forum.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

BrockWI
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Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

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

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.
3 kw solar pv - XW6048 - eight L16's
4 ton GSHP - 1 ton ASHP
2003 VW TDI 200k miles - 52 mpg lifetime
EVSE level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013
lost first bar @ 72k
@90k miles - 54.71Ahr - 83.64SOH - 78.44Hx - 237GID

brycenesbitt
Posts: 111
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

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

Sun May 26, 2019 10:24 pm

So I did that.
Now as I come to a stop, when the car surges forward slightly at the transition point.
So rather than grabby, it's loosey. Kinda disturbing, but at least it is short.

BrockWI
Posts: 758
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

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

Mon May 27, 2019 6:33 am

Yes it does that at first, then slowly will go back to the grabby point. Just making sure you not at 92%'ish percent full (or more) at the same time? If so you loose a lot of the regen braking then I notice more of that missing point in the center of the brake pedal.
3 kw solar pv - XW6048 - eight L16's
4 ton GSHP - 1 ton ASHP
2003 VW TDI 200k miles - 52 mpg lifetime
EVSE level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013
lost first bar @ 72k
@90k miles - 54.71Ahr - 83.64SOH - 78.44Hx - 237GID

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