2013 SL PTC replacement (DTC Codes B2773/B2774)

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smooveride

Member
Joined
Jul 13, 2021
Messages
17
Hello All.. I thought I'd start this as a separate post. Looking to replace my faulted PTC heater in my 2013 SL (codes B2773/B2774). My understanding looking through all the posts on here is that the upgraded replacement part (27143-3NF1B) has different resistance than my OEM one, and therefore less likely to fry again. I don't use/need the high heat all that often, but the few days here in Denver that you do need it.. you really need it!

I'm pretty sure I can DIY this with precautions using Class 0 gloves/etc. I've been trying to track down some info on the web, but a lot of the vids are either RHD cars, or not in english. Anyone car to comment that has done this as to how difficult this is? I'm going to try and do it without removing the dash.

Any info you and/or tips, it would be much appreciated!! Thank you in advance! :D
 
Thank you. I have looked over the service manual info, which wants you to remove the entire dash. I'm hoping to avoid that!
 
Dala said:
I did it on a customer car. 20h+ job to replace the fuse and heater: http://www.japtoys.net/forum/viewtopic.php?f=10&t=3613&start=60#p71462

I am also getting the ptc error on my 2016 leaf sv. Is it easier to do in a 16?
 
mitrals said:
Dala said:
I did it on a customer car. 20h+ job to replace the fuse and heater: http://www.japtoys.net/forum/viewtopic.php?f=10&t=3613&start=60#p71462

I am also getting the ptc error on my 2016 leaf sv. Is it easier to do in a 16?

Yes they improved a lot on the AZE0, much easier to change out the heater
https://www.youtube.com/watch?v=q6SwES6OAVo
 
Dala said:
mitrals said:
Dala said:
I did it on a customer car. 20h+ job to replace the fuse and heater: http://www.japtoys.net/forum/viewtopic.php?f=10&t=3613&start=60#p71462

I am also getting the ptc error on my 2016 leaf sv. Is it easier to do in a 16?

Yes they improved a lot on the AZE0, much easier to change out the heater
https://www.youtube.com/watch?v=q6SwES6OAVo

Wow looks like fun. Here is the code I am getting. Can you let me know if it's the heater or something else https://photos.app.goo.gl/15JqDmTW9Yix13839

Thanks
 
mitrals said:
Wow looks like fun. Here is the code I am getting. Can you let me know if it's the heater or something else https://photos.app.goo.gl/15JqDmTW9Yix13839

Thanks

FSM says;

When the supply voltage input to the PTC heat-
er is the specified voltage value or less.

• PTC heater
• High voltage harness or connectors

(PTC heater high voltage circuit is
open or shorted.)

Diagnosis Procedure

INFOID:0000000010121814

1.

REPLACE PTC HEATER
 
Dala said:
mitrals said:
Wow looks like fun. Here is the code I am getting. Can you let me know if it's the heater or something else https://photos.app.goo.gl/15JqDmTW9Yix13839

Thanks

FSM says;

When the supply voltage input to the PTC heat-
er is the specified voltage value or less.

• PTC heater
• High voltage harness or connectors

(PTC heater high voltage circuit is
open or shorted.)

Diagnosis Procedure

INFOID:0000000010121814

1.

REPLACE PTC HEATER

My code is B2772. Does that matter? Thank you for all your help!
 
HI All.. just checked back on this, sorry for the delay!

I got my brand new PTC heater from an online seller for about $700 total. It was not packaged all that well, and when I pulled it out of the box, one of the plastic mounting tabs on the side had broken off. I sent it back, and they are sending me a new one out. I'll report back on here after I get the repair done..
 
smooveride said:
HI All.. just checked back on this, sorry for the delay!

I got my brand new PTC heater from an online seller for about $700 total. It was not packaged all that well, and when I pulled it out of the box, one of the plastic mounting tabs on the side had broken off. I sent it back, and they are sending me a new one out. I'll report back on here after I get the repair done..

Thanks for the update. My local Nissan dealer has it for 560. Please document your process so I can give it to my mechanic.
 
Finally.. I got around to doing this. This was not an easy DIY, but not impossible with the right tools. This took me about 4 hours. This is for the US market, left hand drive version. I have a 2013 with the heat pump and PTC heater (which coded as B2773 and B2774). I bought a new PTC heater online (part number: 27143-3NF1B) for about $700USD. The links below all provide good info, but nothing is complete. I did not have to drill any holes, or otherwise cause any damage. You will have to bend a metal support for the glove box to access the heater, then bend back into place. Sorry for no pics, but the links below should be enough for you…

DISCLAIMER: This worked for me and my car, follow this at your own risk. You are working with very high voltage and this will kill you if you are not careful.

Tools you’ll need:
Class 0 rubber gloves (for use any time when touching HV plugs)
metric socket set and extensions
T20 Torx socket (preferably 1/4” drive)
T30 Torx security socket (preferably 1/4” drive)
various plastic auto trim tools and metal plug removal tool (U shaped pry tool)
soldering gun and/or crimp tool


Turn car off, wait 10 mins.. make sure keys are not nearby or in your pocket
disconnect 12v negative terminal
wait 10 minutes
disconnect HV plug, re-cover using the top plastic cover for protection
wait 10 minutes
Car is now safe to work on.

Remove passenger seat and move back (I did not disconnect the wires)
remove center console using steps in ‘IP’ instrument panel, body interior from the online Leaf service manuals
https://www.nicoclub.com/nissan-service-manuals

remove glovebox (I cleaned out the cabin filter while I was down there) link below..
remove plastic trim below glovebox from metal support (push up from bottom and out)
you can bend the metal support in and up towards you at this point and it will make the rest of these steps much easier… or you can wait like I did and make it harder on yourself.

you will need to ‘flex out’ the plastic trim to access the screws as well as remove and replace the heater. I managed to do this while not cracking or damaging the plastic. I’d do this while it’s warm/hot out, and the more you flexed it, the easier it got.

remove small 90 degree duct (two tabs on top)
remove side duct (3 screws, top one is hidden and hard to see)
remove metal protection plate, the bottom torx bolt has one of the ground wires connected to it. (4 bolts)

at this point, only 2 screws hold in the heater on either side. i would recommend jacking up the car and removing the upper mid belly pan to access the HV plug for the heater. some folks say you can get your hand down in the hole to unplug/plug the heater from above. i found this to be impossible to do. this only took a few minutes to drop the belly pan and put it back on, and it was very easy to access the plug.

once the HV plug is out, cut the long ground wire that goes up into the dash. you are going to cut off the long wire on your new heater and solder/connect these two wires together as in one of the video links. make sure to give yourself plenty of slack from each to make sure they are not too short.

Remove and replace the PTC heater. Solder/connect the long ground wire and heat shrink protect it.
Plug in HV plug for heater under the car, replace belly pan.

reverse the steps from above. make sure to connect the short ground wire back on the bottom of the shield/metal plate.

plug in HV plug
reconnect 12v negative terminal on the battery

I ran the defrost while monitoring the power usage. It shot up to over 3 KWh while the heater kicked on, but you could feel hot air (not warm) coming up from the vents… and more importantly, no codes!


I used the links below for help on this job. Good luck!!!

https://www.youtube.com/watch?v=VnHtlzHoqpY

https://www.youtube.com/watch?v=GhtRv93l-5o

https://www.youtube.com/watch?v=q6SwES6OAVo&t=11s

https://photos.google.com/share/AF1QipPuoUNMVrYOAUgFsab_EKOAwUkRcZU5_H-KKrweq9uhYYhwgD_ITQcaWubZ-j-q0w?key=VURwUjk5MXRsUmNQb3NFaU5WdjRHMlhFNndkMWNR
 
Just did this on Saturday, took a few hours. The information above was paramount in the process.
 
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