alozzy
Posts: 2494
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: 2011 Not Charging. Bad diode. Aerovironment Works.

That's the one, thanks!
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
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nlspace
Posts: 658
Joined: Mon Jun 05, 2017 10:21 pm
Delivery Date: 06 Jun 2017

Re: 2011 Not Charging. Bad diode. Aerovironment Works.

bdias wrote: Sat Dec 12, 2020 10:38 am ...

i took the car to a Nissan dealer and they stated that there wasn't any fault codes and that the onboard charger had to be replaced (3500 euros).

thanks in advance
Bruno
Howdy Bruno,
This sounds fishy--there are always fault codes, especially when an OBC fails. Maybe a lazy mechanic or dishonest dealer. You could read the codes yourself using the Leaf Spy app and an OBDII dongle.
nlspace
Posts: 658
Joined: Mon Jun 05, 2017 10:21 pm
Delivery Date: 06 Jun 2017

OBC diodes, and B25 connector pinout in FSM?

Here is a picture showing the failed diode D547 from the repair video circled in red. On my 2012 board (Nichicon PA4063RP120) that diode has been etched such that the marking code can't be read.

i traced that diode circuit forward thru the board to the inverting input pin 2 of a dual 2252A op amp IC522; i traced it back to pin 13 of the CN502 connector which exits out the OBC to either pin 7 or pin 9 of B25 of the three control connectors (10-pin B25, 12-pin B26, and 8-pin B27).

Could anyone help to identify a few items?
1. For some reason the pinout diagrams of B24, B26 and B27 are shown, but B25 is not found in the FSM...?
2. The diode in the yellow box area is marked "2U" and i can't find a datasheet for it; it is SMA sized.
3. There is another similar SMA diode marked "S4"--maybe Schottky 40V?
Similar size and marking type so probably the same vendor (Japanese?) but i'm not having any luck finding these.

Image
coulomb
Posts: 188
Joined: Thu Oct 09, 2014 5:08 pm
Delivery Date: 07 Mar 2015
Leaf Number: 200445
Location: Brisbane, Australia

Re: OBC diodes, and B25 connector pinout in FSM?

nlspace wrote: Mon Dec 14, 2020 9:01 pm 2. The diode in the yellow box area is marked "2U" and i can't find a datasheet for it; it is SMA sized.
According to this page (4th last entry), it may be this 200V 1.1A fast silicon diode:
https://pdf1.alldatasheet.com/datasheet ... FL20U.html

Edit: this PDF shows the 2U marking code: https://www.mouser.com/datasheet/2/366/ ... 202930.pdf
2012 Leaf with new battery May 2019. New to me June 2019.
coulomb
Posts: 188
Joined: Thu Oct 09, 2014 5:08 pm
Delivery Date: 07 Mar 2015
Leaf Number: 200445
Location: Brisbane, Australia

Re: OBC diodes, and B25 connector pinout in FSM?

nlspace wrote: Mon Dec 14, 2020 9:01 pm 3. There is another similar SMA diode marked "S4"--maybe Schottky 40V?
Maybe this one, which is Schottky 40V and does have marking code S4, but a different manufacturer [ edit: and different layout of digits ] :

https://www.mouser.com/datasheet/2/345/ ... -34759.pdf
2012 Leaf with new battery May 2019. New to me June 2019.
nlspace
Posts: 658
Joined: Mon Jun 05, 2017 10:21 pm
Delivery Date: 06 Jun 2017

Re: 2011 Not Charging. Bad diode. Aerovironment Works.

Thanks for the help Mike, those are likely the diodes in question, and that's a good smd search site that i've not seen before. kenny
Erikson
Posts: 4
Joined: Mon May 16, 2022 10:12 am
Delivery Date: 16 May 2022

Re: 2011 Not Charging. Bad diode. Aerovironment Works.

going to try darelldd's guide. Thanks for the pictures and explanation!

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