Luddite
Posts: 32
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Friction brakes issue- 100% braking force - calipers?

Wed Jan 24, 2018 3:04 pm

Hello All,

I rarely use the friction brakes - just when coming to a stop or in an emergency but today I was parking and applied the brake pedal lightly but I got full braking force and the car stopped suddenly and unevenly.

I reversed and slammed on the brake but it appeared normal. I tried it again in D and the same thing happened - it got full braking force when the pedal was only slightly depressed. I tried going back and forth a few times - it was fine in reverse but the same problem happened in D.
The braking was uneven and it seemed like the right side was braking more than the left and it made an almighty clunking noise.
Then I put it into drive but it did not move - put it into R and it unstuck.
I did this a few times and it now seems to be OK in Drive and reverse. - braking normally and no clunking.

Would I be correct in thinking this was just a stuck caliper - as the friction brakes are rarely used?
Is this a cause for concern or have I 'fixed' it by using the brakes?

The car is coming up for 7 years old now...

Thanks in advance!
..........................................................
2011 Peugeot Ion

jray3
Posts: 1470
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Friction brakes issue- 100% braking force - calipers?

Wed Jan 24, 2018 3:22 pm

Hmmm, had your car been sitting unused for a while? In our local rainy climate I always have to be careful in the first few drives after a layup, as the rotors get very rusty .
2012 i-SE "MR BEAN" 87,000 miles
2012 i-ES traded at 21,648 miles
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Luddite
Posts: 32
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Friction brakes issue- 100% braking force - calipers?

Wed Jan 24, 2018 3:44 pm

Hi Jray.

Car has been used almost every day but it has been quite rainy of late.

UPDATE: Just noticed this post from years ago on a Nissan Leaf forum -

http://www.mynissanleaf.com/viewtopic.p ... 76#p176190

Seems that some people have experienced similar problems on the leaf and that it was software related?

http://www.mynissanleaf.com/viewtopic.p ... 50#p240150

Also more info on this "grabby brake" issue below:

http://www.electricvehiclewiki.com/Brakes,_ABS#

I'll report back and try and remember to give the friction brakes a workout occasionally - with my driving style and the journeys I do, the friction brake usually only gets used at the end of every journey when I am parking.

Thanks.
..........................................................
2011 Peugeot Ion

FrostyCanada
Posts: 109
Joined: Tue Dec 01, 2015 10:37 am
Location: The Laurentians, a skip away from Montreal, Quebec, Canada

Re: Friction brakes issue- 100% braking force - calipers?

Wed Jan 24, 2018 4:38 pm

Hello Luddite, have you tried running the brakes with the car in neutral?

Removing the regen braking from the equation will help see if it's a software issue or just grabby brakes.

Brian
2016 i-MiEV
with navigation package, in pearl white.

Luddite
Posts: 32
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Friction brakes issue- 100% braking force - calipers?

Thu Jan 25, 2018 11:12 am

Hi Brian,

Thanks for the reply
I haven't tried that yet but I will do. Brakes seemed to be a bit better today still squeaking a lot though.
I tested driving it in D up to 10mph and then braking gently - seems to be a little bit less grabby - but it seems to be the right hand rear wheel caliper that is sticking/grabbing.

It seemed to be a better today - just braking normally when I applied a little bit of force. The rotors have a fair amount of rust too but I thought it was strange that the issue only happened in D not reverse. No regen in reverse (that I know of) - so possibly a combination of rust/lack of use and the interpretation by the software?

Regen is working normally otherwise.
..........................................................
2011 Peugeot Ion

jray3
Posts: 1470
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Friction brakes issue- 100% braking force - calipers?

Thu Jan 25, 2018 11:37 am

Our rear brakes are drum, not disc with calipers. Drums will behave differently than discs and can get grabby if loose, but driving back and forth a few times as you did should ratchet the self-adjusters a notch tighter...

You can get a closer look in this otherwise pointless i-MiEV 'brake cleaning' video.
https://www.youtube.com/watch?v=zxMeQlwCStM
The only reason to soak everything with brake cleaning solvent as he does is if you get grease on the shoes or drum friction surface. By cleaning off the grease that should be on the levers in that assembly, this fellow could actually promote rust on the lever contact points and springs, creating sticky, grabby brakes...
2012 i-SE "MR BEAN" 87,000 miles
2012 i-ES traded at 21,648 miles
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

sandange
Posts: 878
Joined: Thu Jul 05, 2012 2:21 am
Location: Quebec, Canada
Contact: Website

Re: Friction brakes issue- 100% braking force - calipers?

Fri Jan 26, 2018 6:22 am

We get a lot of snow and slush and crust here in Quebec, Canada.
I also park the car lately in the garage - a breeding ground for rust.
Occasionally I'll get the stuck brake in the morning on start off.

Once and a while I'll run her up to highway speed on a safe unoccupied back road , put it in Neutral and brake quickly several times .
This seems to help clear off any rust or crust from the brakes.

(Now at 92,000 miles (148,00km) with original brakes
& yes I did a brake fluid flush 25,00 miles, (40,000 km) ago)
Puey Bluey 2014 Miev
88,850 miles, 143,000 km
Previous EVs
Blackie - 2012 ES Miev 2 years - 67,000 km / (41,630 miles)
Total Electric miles driven 130,480 miles (210,000 km)
http://thecordstead.blogspot.ca/

phb10186
Posts: 290
Joined: Fri May 13, 2016 12:58 am
Location: North London suburbs, UK

Re: Friction brakes issue- 100% braking force - calipers?

Sat Jan 27, 2018 5:33 pm

Luddite wrote:Hi Jray.

Car has been used almost every day but it has been quite rainy of late.

UPDATE: Just noticed this post from years ago on a Nissan Leaf forum -

http://www.mynissanleaf.com/viewtopic.p ... 76#p176190

Seems that some people have experienced similar problems on the leaf and that it was software related?

http://www.mynissanleaf.com/viewtopic.p ... 50#p240150

Also more info on this "grabby brake" issue below:

http://www.electricvehiclewiki.com/Brakes,_ABS#

I'll report back and try and remember to give the friction brakes a workout occasionally - with my driving style and the journeys I do, the friction brake usually only gets used at the end of every journey when I am parking.

Thanks.


Funny that you mention this, as both IMIEVs in the family have had this issue. This is extremely hard brake force applied by a feather touch of the brake pedal.

Mitsubishi sorted this on both cars at the last service, and it was something to do with either a partially blocked filter, or a partially blocked breather tube on the brake vacuum pump . They didn't charge for it on top of the service, which was about £130 or something. It had nothing to do with the rest of the braking system, pads, disks, drums etc.

Both cars have since been fine. Try disconnecting part 1 here, and clean out the hose (part 2) and other areas with an air line - see if that helps:

35A: Basic brake > Brake Electrical Vacuum Pump

http://mmc-manuals.ru/manuals/i-miev/on ... dex_M1.htm
2012 I-MIEV Keiko Silver 16K
2010 Insight ES-T 43K
2001 Accord Type-V (F23 manual)
2009 Hornet CB600F
2008 SH300

Luddite
Posts: 32
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Friction brakes issue- 100% braking force - calipers?

Tue Jan 30, 2018 1:33 pm

Thanks for all the info, guys.

It seems to be a little bit better and less grabby after trying to use the brakes a bit.


=============== EDIT======================

updated - I think the problem described below is the same one sandange was having with his shifter:
viewtopic.php?f=25&t=3830

==========================================

I did have a strange problem today though.
I stopped and put the car into park and the "gear" indicator started flashing P and the yellow exclamation mark came on. The gear indicator flashed in Park and Neutral and Drive, but not reverse.
I had another 10 miles to get home and I didn't want to restart the car in case I couldn't get it started again.

As soon as I drove off, the turtle light came on regen was disabled.
I had never experienced turtle mode before so this was a new one for me. Could do 35-40mph at the maximum on a 60mph road. It was a little dicey!

As soon as I got home, I restarted the car and all seemed OK. I took it on a test run and all seemed well.


Image

Image
https://postimg.org/image/fp3dx6gfp/
https://postimg.org/image/xf52i8ovp/

Thanks
..........................................................
2011 Peugeot Ion

sandange
Posts: 878
Joined: Thu Jul 05, 2012 2:21 am
Location: Quebec, Canada
Contact: Website

Re: Friction brakes issue- 100% braking force - calipers?

Wed Jan 31, 2018 6:16 am

Your warning light experience sounds familiar to the problem I had.
Keep in mind that my Miev is a 2014 North American edition..

Did you watch the video recordings of my problem from my posting that you linked to above?
How does it compare to your problem?
Puey Bluey 2014 Miev
88,850 miles, 143,000 km
Previous EVs
Blackie - 2012 ES Miev 2 years - 67,000 km / (41,630 miles)
Total Electric miles driven 130,480 miles (210,000 km)
http://thecordstead.blogspot.ca/

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