Websterize
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Joined: Mon Jul 21, 2014 7:18 pm
Delivery Date: 21 Jul 2014
Location: Maryland, USA

Electric parking brake switch

Tue Aug 05, 2014 9:17 am

Is there a reason the electric parking brake switch shown below

Image

was omitted in the 2014 model? (Has it been in any U.S.-spec 2011-2015 models?) The image is from page 6 of Nissan's First Responder Guide at http://www.nissan-techinfo.com/refgh0v/ ... AF-FRG.pdf.

The parking brake in the footwell of my 2014 is just so, well, unfuturistic.
Bill | 2014 Leaf SL alumnus

mctom987
Posts: 333
Joined: Wed Jun 25, 2014 6:52 pm
Delivery Date: 29 May 2014
Leaf Number: 332755
Location: San José

Re: Electric parking brake switch

Tue Aug 05, 2014 9:23 am

AFAIK, no vehicle in the world has an electric parking brake. This is just ultimately doomed to fail.
The "Park" on most cars is not a brake, but a pin. Similar goals, but extremely different implementations. Park is usually accomplished by a pin, or other interlocking mechanism to prevent any movement, and will cause major damage if applied at a high speed. A brake is friction based, and can be applied at any speed without causing damage.

That said, I've never seen the referenced device. With the steering wheel on the left, it definitely looks like a US spec car. I've been in a '12, '13, and I own a '14, and none of them have anything there.
2014 Green Leaf SL +PP
June: 580.6 mi, 4.7mi/kWh
July: 1443.8mi, 4.8mi/kWh
Aug: 1157.9mi, 5.1mi/kWh

bbrowncods
Posts: 185
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Leaf Number: 339458
Location: Norfolk VA

Re: Electric parking brake switch

Tue Aug 05, 2014 9:40 am

The ebrake was electric and is now the standard mechanical one found in most cars. Unknown why that happened.
2014 Cayenne Red Leaf SL purchased 6/9/2014 (dealer received it on 6/7/2014), manufacture date 4/2014.
7/4/14 -629 miles, Temp 83, SOC 97.5, 59.81 Ahr, SOH 91%, Hx 91.44, 20.2 Kwh, Avg 4.127, High 4.136, Low 4.122, GIDS 267/92.5%.

DarkStar
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Leaf Number: 568
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Re: Electric parking brake switch

Tue Aug 05, 2014 10:02 am

I can confirm this was on all 2011 models.
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

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Bateman
Posts: 101
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Delivery Date: 25 May 2013
Location: Central NJ

Re: Electric parking brake switch

Tue Aug 05, 2014 10:08 am

My father-in-law's Subaru Legacy station wagon just had to have it's entire electronic parking brake system replaced. In a case like this, I'll take the basic no-frills reliability of a manual pedal or handle over something being electronic for the sake of being advanced.
Bateman
2013 Blue Ocean Leaf SV

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dgpcolorado
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Re: Electric parking brake switch

Tue Aug 05, 2014 10:14 am

DarkStar wrote:I can confirm this was on all 2011 models.
And the 2012s. The electric parking brake was replaced by the mechanical one in the USA-built 2013 LEAFs, along with other changes, such as steel doors versus the aluminum ones in the Japan built 2011/2012 LEAFs.

My guess is that the parking brake change was made to reduce costs, but who knows?
Blue 2012 SV Dec 2011 to Feb 2016
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Nubo
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Location: Vallejo, CA

Re: Electric parking brake switch

Tue Aug 05, 2014 10:32 am

Iirc, the change to a conventional parking brake was made in 2013 models. My 2012 has the electric version. I kind of like it in that it intrudes less into the passenger space than a normal handbrake and it makes a nifty whirring sound :). Also my wife sometimes has problems with applying enough force for a conventional handbrake. So one nice aspect is consistent application pressure.

On the other hand, it is not as utilitarian; you can't do a handbrake turn, for example ;) And a parking brake on the floor is hopelessly dull. But does probably have the advantage of being cheaper and more reliable.
I noticed you're still working with polymers.

TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Electric parking brake switch

Tue Aug 05, 2014 10:44 am

mctom987 wrote:AFAIK, no vehicle in the world has an electric parking brake. ...

The Volt also has a switch activated electric parking brake.

I think the speculation that the US 2013 LEAF changed to foot activated parking brake was cost driven is correct.
If all your other Nissan vehicles are using a foot activated parking brake, then it has to be probably 1/3 the cost of the electric parking brake.

Opinions on the electric parking brake were mixed at best though.
For my wife and I it is one of the favorite things about the vehicle.
Nissan dropping it in 2013 is one of the two things that drove our decision to not trade in 2011 for a 2013 SL.
(Other thing was leather only in black.)
Some people just mistrusted electric parking brake that it might not work in an emergency. It has a very large capacitor in back of vehicle also shown in emergency responder instructions.
In an emergency pulling on the electric brake switch will continuously apply it, although I haven't tested it.

Some thought use of foot in an emergency was better than one hand off the wheel to apply emergency / parking brake.
Seems OK to me.
But possible Nissan attornies might have also influenced elimination of the electric parking brake.

I would like to see Nissan bring it back but that is unlikely.
May take a doubling of battery capacity to get me to trade in the 2011 without it though :(

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

mctom987
Posts: 333
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Re: Electric parking brake switch

Tue Aug 05, 2014 10:58 am

I prefer the manual foot-activated parking brake.

If it works just fine, why overcomplicate it with no benefit? Just more things to go wrong.
2014 Green Leaf SL +PP
June: 580.6 mi, 4.7mi/kWh
July: 1443.8mi, 4.8mi/kWh
Aug: 1157.9mi, 5.1mi/kWh

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gbarry42
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Re: Electric parking brake switch

Tue Aug 05, 2014 11:01 am

If you look back to the posts from 2011, you'll find that most people thought the electric mechanism was overly complicated and bound to fail. Well, in this sample of 1, I've used it every time I move the car, and there have been no issues.

The consensus back then was that the LEAF got to market before they had worked out how to put in a conventional parking brake system. There's no floor tunnel, and there's a battery sitting in the way of actuator cables. So this system was rather hurriedly "glued on" as an afterthought to make things work. From that viewpoint, what they did subsequently was to work out a way to have the cheaper, simpler, conventional parking brake mechanism.

It is not, by the way, the parking pawl mechanism. It is the parking brake. mctom987 probably has never seen this item. BTW, I recently learned that the EV-1 had electric service brakes. I think I want to verify that one with a former owner.

It is somewhat futuristic. And, while you notionally can't do handbrake turns, it's not impossible. Search on "LEAF J-turn" and enjoy the video :)
And there goes the first capacity bar! At 24,000 mi on 9/9/2013.
Second bar at 30,500 mi on 2/7/2015.

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