GerryAZ
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Re: 2013 Nissan Leaf - won't start

Sun Jul 07, 2019 8:18 pm

I agree--all of the "C" codes you listed are common with low 12-volt battery. It won't hurt anything to try clearing all of the trouble codes with LEAF Spy Pro after making sure you have a well-charged 12-volt battery in place. You may need to clear codes multiple times and disconnect/reconnect the 12-volt battery once or twice with code clearing processes repeated each time to clear all codes. I doubt that the car will go into ready mode until the P31 code is cleared.
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

danowpg
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Joined: Sun May 17, 2015 4:24 pm
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Leaf Number: 024077

Re: 2013 Nissan Leaf - won't start

Wed Jul 10, 2019 5:26 pm

GerryAZ wrote:I agree--all of the "C" codes you listed are common with low 12-volt battery. It won't hurt anything to try clearing all of the trouble codes with LEAF Spy Pro after making sure you have a well-charged 12-volt battery in place. You may need to clear codes multiple times and disconnect/reconnect the 12-volt battery once or twice with code clearing processes repeated each time to clear all codes. I doubt that the car will go into ready mode until the P31 code is cleared.
So I tried doing this twice today, and those four codes would not clear. I also went through all the fuses I could get access to, in the cabin, and in the front bay the main fuse box there as well as the two sub panels. All seemed to be fine.

Has anyone had the codes and not been able to clear them? What were your next steps? I was reading the P31 code and I might have to troubleshoot part of the high voltage system? And the other ones about the brakes? Are there common problems or parts that I could possibly order to just replace and see if it fixes the issue?

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Nubo
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Re: 2013 Nissan Leaf - won't start

Thu Jul 11, 2019 10:57 am

danowpg wrote:
GerryAZ wrote:I agree--all of the "C" codes you listed are common with low 12-volt battery. It won't hurt anything to try clearing all of the trouble codes with LEAF Spy Pro after making sure you have a well-charged 12-volt battery in place. You may need to clear codes multiple times and disconnect/reconnect the 12-volt battery once or twice with code clearing processes repeated each time to clear all codes. I doubt that the car will go into ready mode until the P31 code is cleared.
So I tried doing this twice today, and those four codes would not clear. I also went through all the fuses I could get access to, in the cabin, and in the front bay the main fuse box there as well as the two sub panels. All seemed to be fine.

Has anyone had the codes and not been able to clear them? What were your next steps? I was reading the P31 code and I might have to troubleshoot part of the high voltage system? And the other ones about the brakes? Are there common problems or parts that I could possibly order to just replace and see if it fixes the issue?
I suspect the p31e1 is the root problem and the brake codes are subsequent to that.

The code lists 3 possible causes
"Harness and connector (Connection detecting circuit within Li-ion battery)"
"High voltage harness"
"Service plug"

Best I can recommend is read the service manual thoroughly. I don't know your level of expertise but working on 400V DC is not to be taken lightly and can easily kill you.

The first part of the diagnosis is making sure the 12V battery is supplying adequate power. Have you ensured this is the case? Are the battery terminals clean and tight, and how about the ground cable; is the bolt clean and tight? Might be worthwhile to remove the ground bolt and make sure the connection area is clean before retightening. Loose or dirty connections at the terminals or ground point can cause 12V problems even if the 12V battery is healthy. What is the 12V reading on LeafSpy? Turn headlights on HIGH. Does the 12V drop significantly?
I noticed you're still working with polymers.

danowpg
Posts: 32
Joined: Sun May 17, 2015 4:24 pm
Delivery Date: 03 May 2015
Leaf Number: 024077

Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 5:24 pm

Nubo wrote:
danowpg wrote:
GerryAZ wrote:I agree--all of the "C" codes you listed are common with low 12-volt battery. It won't hurt anything to try clearing all of the trouble codes with LEAF Spy Pro after making sure you have a well-charged 12-volt battery in place. You may need to clear codes multiple times and disconnect/reconnect the 12-volt battery once or twice with code clearing processes repeated each time to clear all codes. I doubt that the car will go into ready mode until the P31 code is cleared.
So I tried doing this twice today, and those four codes would not clear. I also went through all the fuses I could get access to, in the cabin, and in the front bay the main fuse box there as well as the two sub panels. All seemed to be fine.

Has anyone had the codes and not been able to clear them? What were your next steps? I was reading the P31 code and I might have to troubleshoot part of the high voltage system? And the other ones about the brakes? Are there common problems or parts that I could possibly order to just replace and see if it fixes the issue?
I suspect the p31e1 is the root problem and the brake codes are subsequent to that.

The code lists 3 possible causes
"Harness and connector (Connection detecting circuit within Li-ion battery)"
"High voltage harness"
"Service plug"

Best I can recommend is read the service manual thoroughly. I don't know your level of expertise but working on 400V DC is not to be taken lightly and can easily kill you.

The first part of the diagnosis is making sure the 12V battery is supplying adequate power. Have you ensured this is the case? Are the battery terminals clean and tight, and how about the ground cable; is the bolt clean and tight? Might be worthwhile to remove the ground bolt and make sure the connection area is clean before retightening. Loose or dirty connections at the terminals or ground point can cause 12V problems even if the 12V battery is healthy. What is the 12V reading on LeafSpy? Turn headlights on HIGH. Does the 12V drop significantly?
I have installed a brand new battery and have ensured it was fully charged and connections secure. I have a battery charger at home. I had not checked the ground cable, and while tight, it does looks not a lot, but a little corroded where it meets the body. I'll see if a friend of mine can make me some new ground cables and see if that helps.

I don't have high-voltage experience, so that's something I don't want to really deal with too much. Im sure by following instructions for dealing with it I would be fine, but I do heed your caution. I have been busy with life for the past little while, so I'll try the ground cable and see if that helps...

LeftieBiker
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Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 7:26 pm

After a new battery, the next step is to try to clear ALL of the error codes with LeafSpy Pro. Any codes that show after that, if any, should be real problems.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

danowpg
Posts: 32
Joined: Sun May 17, 2015 4:24 pm
Delivery Date: 03 May 2015
Leaf Number: 024077

Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 7:31 pm

LeftieBiker wrote:After a new battery, the next step is to try to clear ALL of the error codes with LeafSpy Pro. Any codes that show after that, if any, should be real problems.
Yes. That's what I've done several times. The four I listed before (and below) are the ones that persist...

C118C 0109 ABS EV/HEV System BRC-126
C1A6E 0109 Brake EV/HEV System BR-146
C1A70 0109 BRAKE Brake control system BR-160
P31E1 000B EV/HEV HV System Interlock Error EVC-305

LeftieBiker
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Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 8:10 pm

If the codes come back with a fresh, charged battery, and after being cleared, then something in those systems needs to be replaced. The question is...what? My guess - and it is only a guess - is that you have one faulty component causing all of those related messages.
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.

Lothsahn
Posts: 483
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Leaf Number: 007797

Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 10:07 pm

danowpg wrote: Yes. That's what I've done several times. The four I listed before (and below) are the ones that persist...

C118C 0109 ABS EV/HEV System BRC-126
C1A6E 0109 Brake EV/HEV System BR-146
C1A70 0109 BRAKE Brake control system BR-160
P31E1 000B EV/HEV HV System Interlock Error EVC-305
According to the service manual, P31E1 is caused by:
High voltage harness
Service Plug
Harness and Connector (Connection detecting circuit within Li-ion battery)


Steps to diagnose:
1) Ensure the service plug is installed and seated properly, and has not come loose. It's located underneath a panel in the floor between the two rear seats.
2) Turn off car and wait >30 seconds. Check 12V voltage is 11V or more. Personally, I'd make sure it's 12.4V or more.
3) Check the high voltage connector harness to the battery.
4) Using a 500V DC meter and HV gloves, check that the HV terminals on the battery read 5v or less.
5) Visually inspect, check continuity of HV cabling harness from end to end, and replace if problems are found.

C1A6E - Indicates a malfunction in the VCM system, caused by a failed VCM, harness or connector, or the electrically driven brake unit

This code recommends, again, checking the 12v battery voltage and multiple steps with the consult tool (which you don't have) to test the brake controller.

C1A70 - Indicates a malfunction in the intelligent brake controller or harness

Again, this recommends checking the 12v battery and then a bunch of diagnostic steps of the brake controller with consult.



I see nothing in the service manual showing these codes trigger each other, but I can't rule that out either. This post showed someone with all the same codes you have:
https://www.mynissanleaf.com/viewtopic.php?f=30&t=26821

Unfortunately, that person has never posted with the root cause on those codes.


A couple thoughts:
1) The common failure point is the 12v battery. However, you've sworn up and down it's charged, provides good voltage, etc. Double check the battery terminals, make sure there's no corrosion, etc.


2) Another problem that has come up on the forums is the pre-charge resistor, as posted by Leftiebiker. This may be it, as this guy has EXACTLY the same 4 codes you do, and diagnosed it as a failed resistor in the pre-charge circuit, which is located inside the battery:
https://www.mynissanleaf.com/viewtopic.php?t=21776

If your pre-charge circuit failed, the failure may still be under warranty. Battery warranty lasts 8 years, 60k miles. If you have <60k miles, you might be able to get a new battery out of this... Be careful not to void the warranty doing work on your own, in case this is the failed component...


3) If #1 & #2 aren't the issue, you're really going to need the consult tool to get to the bottom of it, or start randomly checking connections, wiring harnesses, etc. Because all of the codes involve CAN bus errors (the P31E1 from the BCM--battery), and the rest from the brake controller, I would start checking the can bus wiring from the battery and the intelligent brake controller to the VCM. A disconnect or problem with the CAN bus could cause all of these errors. The primary CAN bus in the leaf has the VCM, DLC, BCM, ABS, Steering, and Dash/Nav. You fault codes involve the VCM, BCM, and ABS, all of which are on this bus.

See here:
http://www.mynissanleaf.com/viewtopic.php?t=4131

So, in short, I think diagnosing with Consult is the way to go, but you've said you really don't want to spend $600 at the dealer for a possible non-fix. Given that, I would start checking electrical continuity between pins between BCM, VCM, and ABS. As always, given the BCM is located in a 400V+ battery, be careful in case there's a short somewhere and there's high voltage somewhere you don't expect.

If you go the self-repair route, you're going to need the service manual. Everyone on this forum has given you the common cause (low 12V battery), but you've pretty clearly stated that it's not your issue. Therefore, some detailed debugging is in order.

Best of luck.
Last edited by Lothsahn on Wed Jul 17, 2019 10:17 pm, edited 1 time in total.
2011 Silver SV, purchased 2018, lives in Missouri (previously in CA)
LeafSpy Pro + BAFX Products OBDII dongle
Battery swap 2019/04/24 (87% SOH, 12 bar)

LeftieBiker
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Re: 2013 Nissan Leaf - won't start

Wed Jul 17, 2019 10:11 pm

Very helpful post. Thanks.
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.

danowpg
Posts: 32
Joined: Sun May 17, 2015 4:24 pm
Delivery Date: 03 May 2015
Leaf Number: 024077

Re: 2013 Nissan Leaf - won't start

Thu Jul 18, 2019 4:20 pm

Yes, thanks Lothsahn for your post. Before work today I tried cleaning the main ground near the battery - sanding the area where the bolt meets the body, sanding the lip under the bolt head, and both surfaces of the tab that connects to the ground wire. Unless there is a ton of corrosion inside the copper threads where the tab connects, that didn't solve the problem.

Sometimes people have been able to get into the car - I'll double check the disconnect on the floor between the two seats and check back again.

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