DaveinOlyWA
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Leaf Number: 319862
Location: Olympia, WA
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Re: NTB-12-086: Touchy Brake Fix Released

RegGuheert wrote:Good news! Nissan called and said the update is now complete! They let our LEAF sit over the weekend and the mechanic was able to complete the process this morning.

I had called first thing to let them know what had been said in this thread about reenrgizing the ultracapacitor, but it is not clear if that was the issue or not. I will post back if I learn anything more when I pick the car up in the morning.

I'm glad to be getting the car back without a major amount of work and with the improved braking software!
glad to hear your brake controller was "replaced" so quickly ;)
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 25,047 mi, 92.12% SOH
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RegGuheert
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Leaf Number: 5926
Location: Northern VA

Re: NTB-12-086: Touchy Brake Fix Released

GeekEV wrote:Though the brakes still feel a *little* touchy at extremely low creep speeds...
+1 In fact, they seem to be *more* grabby at creep speeds than they were before the reprogramming. So there may need to be a little bit of reprogramming for the drivers now. I'll take grabby brakes at creep over grabby brakes at 10MPH any day!

Here is a little more information about the update since none of us seem to have a copy of the NTB:

Brake System Part Number Before Reprogramming: 46007-3NA0A
Brake System Part Number After Reprogramming: 46007-3NA1A

(This information is somewhat useless to us right now since I don't think anyone has the ability to read part numbers for any system other than the center console. But perhaps we will have some possibility to read them using LEAFScan once it becomes available.)

From my paperwork, it seems the program associated with NTB012-086 may be referred to as PX65AA.
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
DaveinOlyWA
Posts: 16058
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: NTB-12-086: Touchy Brake Fix Released

From Aaron today on Seattle FB page
News for 2012 Leaf owners with grabby brakes. A new reprogram is available to help with your low speed brake concerns. Effects all cars built before June 6th 2012.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 25,047 mi, 92.12% SOH
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Ingineer
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Leaf Number: 6969
Location: Berkeley, California
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Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

Here's the first page of the TSB:

Image

The problem is there is a typo, they specify 2011 vehicles, but then state that they must be built AFTER June 6th, 2012!

-Phil
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Nubo
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Location: Vallejo, CA

Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

Ingineer wrote:Here's the first page of the TSB:

The problem is there is a typo, they specify 2011 vehicles, but then state that they must be built AFTER June 6th, 2012!

-Phil
Lol, so they plan on including the bad firmware indefinitely :lol:

Glad to see it extended to my2012 vehicles. Now I can get it dealt with along with my upcoming battery check. Might not have noticed the brake issue had it been another car but other traits of the LEAF are so smooth that the brakes seem out of place.
I noticed you're still working with polymers.
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Ingineer
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Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

Nubo wrote:Lol, so they plan on including the bad firmware indefinitely :lol:
LOL! Yes, I suspect this is definitely true! =)
Nubo wrote:Glad to see it extended to my2012 vehicles. Now I can get it dealt with along with my upcoming battery check. Might not have noticed the brake issue had it been another car but other traits of the LEAF are so smooth that the brakes seem out of place.
Looks like any car under VIN #23495 qualifies. I plan on getting mine at some point.

-Phil
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doug401
Posts: 73
Joined: Wed Oct 05, 2011 8:10 am
Delivery Date: 04 Oct 2011
Leaf Number: 7228
Location: Lake Stevens WA

Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

I had this NTB performed yesterday during my annual battery check. It took way longer than planned, about 3.0 hours total time. In fact the lead mechanic gave me the entire NTB to read while I waited. Later he brought me back to the garage to see that they were in fact working on the car. They had a hangup at some point which caused the delay. I ask the mech how many times he has done this NTB, he said this was his second time.

All seems fixed. And they left a "courtesy" copy of the NTB on my passenger seat. It's about 20 pages, 30 something steps. Consult III this... Don't plug in EVSE that... etc. :?
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RickS
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Joined: Wed Sep 01, 2010 6:04 pm
Delivery Date: 11 Jun 2013
Location: Tempe, AZ

Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

I had this done a few weeks ago and I can say the TSB definitely fixes the touchy brakes! The brake feel is much better now. I was quoted 3 hours to perform this update so I just dropped off the car at 8 in the morning and picked it up at lunch time. I also had them run another battery check while I was at it so I can complain to Nissan more.
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JeremyW
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Leaf Number: 19136
Location: San Gabriel, CA

Re: NTB-12-086: Touchy Brake Fix Released. 2012 MY Fix Avail

Got it done on Thursday. Brakes feel much more solid at slow speeds. Grabby no more! :)

Convincing the dealer/service writer to do it was interesting. They kept saying "there's no campain for your car" and I had to keep repeating the NTB number to get them to do the work!

I got a loaner car for the day... just a reminder that I never ever want to own an ICE again! Ick! ;)
Former 2012 SL leasee (6/23/12 - 9/23/15)
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planet4ever
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Leaf Number: 1537
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Re: NTB-12-086: Touchy Brake Fix Released

RegGuheert wrote:
GeekEV wrote:Though the brakes still feel a *little* touchy at extremely low creep speeds...
+1 In fact, they seem to be *more* grabby at creep speeds than they were before the reprogramming. So there may need to be a little bit of reprogramming for the drivers now. I'll take grabby brakes at creep over grabby brakes at 10MPH any day!
I got the impression from the earlier "Grabby Brakes" thread that some people were talking about one problem and others about a different one. That's what I'm reading again here. My brakes sometimes grab when creeping in traffic, but I have never experienced it at anywhere close to 10 mph.

Based on your report, I believe I will not want to get the update [if it even applies to my March 2011 car].

Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

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