2011 Not Charging. Bad diode. Aerovironment Works.

[alozzy]

That's the one, thanks!

[nlspace]

...

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]

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.

[coulomb]

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

[coulomb]

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

[nlspace]

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]

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