carlk
Posts: 2
Joined: Tue Feb 07, 2012 4:21 pm
Delivery Date: 07 May 2015

Re: Brakes Fail upon Powering On

Wed May 02, 2018 7:11 am

I also had the "brakes fail at power-on" issue, it would then be normal 30 minutes later. However, I subsequently had the issue of virtually no brakes while driving on the highway. All the brake associated warning lights came on. It was then fine the next day so that I could drive it to the Nissan dealership. So far, the first 5 miles from the dealership after repair have been normal.
Here is the pertinent info from the dealer invoice. (This is a 2015 Leaf about 1 week from the 3 year warrantee expiring.)

:3 : 14 23APR.1g Ilo : o+ 0lMAv -o r LINE OPCODE TECH TYPE HOURS
A Brake warning and ABS lights come on ano v- r;;ar y no braking with
loud shuttering noise. Then later ail- is normal.
CAUSE: CUSTOMER STATES AT T]MES VEH]CLE W]LL NOT HAVE BRAKES, ABS LIGHT
AND BRAKE L]GHT COME ON.
30 Brake warning and ABS lights come on and
virtually no braking with loud shuttering
noise. Then later all- is normal.
3333 W L 46007-4NPOC CONTROLLER ASSY-BRAKE
L 47560_4NA1A ACTUATOR ASSY-ANTISKID
L 24012-3NHOA HARNESS-ENGINE ROOM
(N/C)
(N/c)
(N/c)
(N/C)
SUBL RENTAL PO#NCI6633
W (N/C)
PARTS: 0.00 LABOR: 0.00 OTHER: 0.00 TOTAL LINE A: 0.00
26986 CUSTOMER STATES AT TTMES VEHICLE WILL NOT HAVE BRAKES, ABS
LIGHT AND BRAKE LIGHT COME ON. "FOUND CODES C118A U1OOO UllOD P3195.
CALLED TECH LINE. FOUND THAT CODES ABE VNDER ENG]NEERfNG REVIEW. WAS
ADVTSED TO REPLACE ENG]NE ROOM HARNESS, E DRIVEN TNTHLL]GENT BRAKE
SYSTEM CONTROLLER, AND ABS ACTUATOR. REPLACED HARNESS ASSEMBLY, ABS
ACTUATOR, AND INTELLIGENT BRAKE SYSTEM CONTROLLER. TESTED OPERATION AND
VERIFIED REPAIR. TECH LrNE CASE J000L230976 , ****************************************************

jbuntz
Posts: 141
Joined: Thu Dec 08, 2016 5:41 am
Delivery Date: 17 Dec 2016
Leaf Number: 303765
Location: New Braunfels, TX

Re: Brakes Fail upon Powering On

Thu May 24, 2018 8:00 pm

I had the brake failure at power on issue on my 2016 SL. Nothing on the dash alerted me. The brakes did work, but it seemed like no vacume assist, so had to press really hard. Towed to a dealer. Showed this thread to the dealer and they replaced the 12v battery. Very scary, I rolled out into an intersection and luckily I was not in an accident or ran over a pedestrian.
Mfg 11/15 Del 12/16 TX 2016 SL 30kWh,
Date Bar MI GID Ahr SOH
05/17 12 05175 324 70.75 89
08/17 11 09245 282 61.68 77
10/17 10 12000 260 57.22 71
01/18 09 15329 244 53.72 68
06/20 08 21716 230 50.41 63
06/27 11 22047 296 66.01 83 Aftr Updt

ponohome
Posts: 1
Joined: Wed Aug 29, 2018 4:53 pm
Delivery Date: 29 Aug 2018
Leaf Number: 303221

Re: Brakes Fail upon Powering On

Fri Jul 05, 2019 6:43 pm

Same problem. 2015 Leaf, with a 12V battery that is less than a year old (though some have said that's not the issue anyway).

Anyone figure out what's happening with this? My Nissan dealer here looked at it, couldn't replicate the issue (brakes started working after we towed it in), and then suggested about $7K worth of complete overhaul, which I figured was their way of saying "We don't know what the problem is, so we'll suggest an absurd amount, knowing he'll say no, but releasing our liability if something goes wrong again".

Thanks

LeftieBiker
Moderator
Posts: 12965
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Brakes Fail upon Powering On

Fri Jul 05, 2019 7:04 pm

ponohome wrote:Same problem. 2015 Leaf, with a 12V battery that is less than a year old (though some have said that's not the issue anyway).

Anyone figure out what's happening with this? My Nissan dealer here looked at it, couldn't replicate the issue (brakes started working after we towed it in), and then suggested about $7K worth of complete overhaul, which I figured was their way of saying "We don't know what the problem is, so we'll suggest an absurd amount, knowing he'll say no, but releasing our liability if something goes wrong again".

Thanks
Do you leave the car plugged in for long periods (6+ hours, days...) after charging ends or before it begins?
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.

User avatar
Nubo
Posts: 5350
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Brakes Fail upon Powering On

Fri Jul 05, 2019 9:40 pm

ponohome wrote:Same problem. 2015 Leaf, with a 12V battery that is less than a year old (though some have said that's not the issue anyway).

Anyone figure out what's happening with this? My Nissan dealer here looked at it, couldn't replicate the issue (brakes started working after we towed it in), and then suggested about $7K worth of complete overhaul, which I figured was their way of saying "We don't know what the problem is, so we'll suggest an absurd amount, knowing he'll say no, but releasing our liability if something goes wrong again".

Thanks
"It's 'idiopathic'. That's Latin. It means they're idiots and they have no idea what's wrong." -- House MD
I noticed you're still working with polymers.

GerryAZ
Gold Member
Posts: 2243
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Brakes Fail upon Powering On

Sun Jul 07, 2019 8:42 pm

CAN Bus communication problems can cause the loss of power assist, but the brakes should still work as long as the hydraulic system is intact (requires extremely high pedal pressure and pedal will go almost to floor). It may seem like total brake failure because it may feel like the pedal is going to the floor even though it is not quite to the floor and extreme pressure on the pedal will apply the brakes. CAN Bus communication problems are often caused by low voltage on the 12-volt system so the issue may temporarily clear if the car is placed in ready mode for a few minutes to charge the 12-volt battery and then powered off followed by restart.

CAN Bus communication problems can also set ABS/Brake Controller error codes which cause the ABS pump and solenoid valves to operate continuously when the brake pedal is pressed. In this case, power assist is still present when brake pedal is firmly pressed, but it is hard to modulate brake action (pedal acts like an on/off switch). Again, temporary fix involves clearing all of the trouble codes (which usually requires disconnecting/reconnecting the 12-volt battery a couple of times with LEAF Spy Pro code clearing procedures followed multiple times. In my case, the permanent fix was to replace the intelligent brake controller because it would occasionally cause CAN Bus communication errors with the ABS/traction control system which caused the ABS pump/valves to run continuously (I suspect an internal firmware/software issue--dealer replaced intelligent brake controller with extended warranty picking up the cost).
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL+ purchased 8/10/2019

TheLostPetrol
Posts: 81
Joined: Thu Jul 13, 2017 8:19 am
Delivery Date: 21 Feb 2018
Leaf Number: 307105
Location: Greater Chicagoland

Re: Brakes Fail upon Powering On

Mon Sep 23, 2019 2:00 pm

Ninjarider1978 wrote:
Tue Dec 01, 2015 9:53 am
My 2015 S just had the same problems as mentioned above in numerous other posts. I would not expect it to be a battery problem since the vehicle is only 2 months old. Just last Friday I had the recall performed on the vehicle the same as the person above. It is not that cold here, in fact warmer than it has been in the mornings.

Read the DTC codes

U100D 0109 ABS CAN Comm Circuit
U110D 0109 ABS E-Driven Intelligent Brake Comm BRC-130
Ok None ---> AIR BAG
Ok None ---> BCM
Ok None ---> EPS
P3195 000B EV/HEV CAN Error EVC-272
U1000 000B EV/HEV CAN Comm Circuit
Ok None ---> HVAC
Ok None ---> HV BATTERY
Ok None ---> IPDM E/R
Ok None ---> METER
Ok None ---> MOTOR CONTROL
Ok None ---> SHIFT
This morning backing out of the garage I had low brake pedal, no power assist, and red and yellow brake warning lights on the dash. LeafSpy showed the exact DTC codes noted by Ninjarider1978. I suspected low battery voltage because both ABS and EV/HEV error areas included "CAN Comm Circuit".

What was unusual is that, wanting to charge (level 2) for an hour at 9:30 last night, I set the charge end timer for 10:30 PM and plugged in. Usually, I'd have set the charge start time to 6 AM and charge end time to 7 AM if I wanted to charge for an hour. The car was plugged in and not charging for 10 hours until 8:30 this morning.
What was not unusual was the OBDII dongle plugged in, as it has been 24x7 for the year and half I've had the car.
I suspect the first or both of these circumstances brought the 12V battery voltage too low this morning.

The ABS DTCs wouldn't clear, so I disconnected the 12V for about 10 minutes. After reconnecting, the DTCs cleared, the dashboard warning lights have remained off, and the brakes have worked normally.

It was one of the colder mornings so far this fall, but at 59 F, not all that cold.
2018-02-21 Used 2015 LEAF SV Mfd 2014-07 In-serv 2015-02-27
Date mi AHr SOH Hx QC L1/L2
2018-02-21 26,938 60.22 97.0 90.7 1 988
2018-07-01 31,601 58.05 93.5 87.0 11 1223
2018-10-01 35,428 55.63 89.6 82.1 16 1440
2019-08-01 45,923 56.20 90.5 83.3 23 1968

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