Nissan Leaf Gen2 Board: Difference between revisions

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[[File:DSC03474-1000x700.jpg|thumb|open inverter replacement mother board kit. Assembled and installed in a gen 2 nissan leaf inverter]]
The Nissan Leaf gen 2 board is a replacement mother board for the gen 2 leaf inverters. it utilizes a adapter board to fit a rev 3 openinverter board in into the leaf inverter.
The Nissan Leaf gen 2 board is a replacement mother board for the gen 2 leaf inverters. it utilizes a adapter board to fit a rev 3 openinverter board in into the leaf inverter.


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== Nissan Board Removal ==
== Nissan Board Removal ==
[[File:Nissan inverter board.jpg|alt=Nissan board, yet to be removed. The large connector on the left must be salvaged and re-used.|thumb|Nissan board, yet to be removed. The large connector on the left must be salvaged and re-used.]]The inverter casing attaches directly to the motor and may be opened by removing the 10mm hex head bolts underneath the top lip along with the waterproof guard for the large connector.
[[File:Nissan inverter board.jpg|alt=Nissan board, yet to be removed. The large connector on the left must be salvaged and re-used.|thumb|OEM Nissan logic board, yet to be removed. The large connector on the left must be salvaged and re-used.]]The inverter casing attaches directly to the motor and may be opened by removing the 10mm hex head bolts underneath the top lip along with the waterproof guard for the large connector.


Once opened the board with the controller is easily distinguished as it has the large connector attached. It is on it's own carrier attached to the lid by 3 allen head bolts. Start by disconnecting the plugs from the four connectors at the top of the board, then remove the allen bolts to free the carrier.
Once opened the board with the controller is easily distinguished as it has the large connector attached. It is on it's own carrier attached to the lid by 3 allen head bolts. Start by disconnecting the plugs from the four connectors at the top of the board, then remove the allen bolts to free the carrier.

Revision as of 08:35, 30 December 2020

open inverter replacement mother board kit. Assembled and installed in a gen 2 nissan leaf inverter

The Nissan Leaf gen 2 board is a replacement mother board for the gen 2 leaf inverters. it utilizes a adapter board to fit a rev 3 openinverter board in into the leaf inverter.

this allows full control over the nissan power stage.

Shop link: https://openinverter.org/shop/index.php?route=product/product&product_id=57

Swap video: https://www.youtube.com/watch?v=T_6hw6vGzfM

The Kit

The kit comprises of a openinverter rev3 board, a wifi board, adapter board, and various connectors and components. The kit is designed to drop in place of the original Nissan logic board. The adapter board is designed to re-use the large proprietary connector that is mounted on the original logic board.

Nissan Board Removal

Nissan board, yet to be removed. The large connector on the left must be salvaged and re-used.
OEM Nissan logic board, yet to be removed. The large connector on the left must be salvaged and re-used.

The inverter casing attaches directly to the motor and may be opened by removing the 10mm hex head bolts underneath the top lip along with the waterproof guard for the large connector.

Once opened the board with the controller is easily distinguished as it has the large connector attached. It is on it's own carrier attached to the lid by 3 allen head bolts. Start by disconnecting the plugs from the four connectors at the top of the board, then remove the allen bolts to free the carrier.

Next remove the screws holding the board to the carrier. Nissan uses some very strong thread lock so be prepared for some of the screw heads to shear, the sheared stubs can be removed afterwards using heat to burn off the thread lock.

Nissan Proprietary connector as seen from outside the housing.
Nissan Proprietary connector as seen from outside the housing.
Pin function descriptions, pins as seen from outside the housing
Proprietary connector pin function descriptions, pins as seen from outside the housing.

Once the board has been removed from the carrier the large connector must be salvaged from it. One method is shown in the swap video, a vacuum soldering iron is also known to work.

Kit Build

  1. Solder the components to the board as per the instructions.
  2. The large proprietary connector must be salvaged from the original Nissan logic board. as it is not available on the open market. once salvaged, solder it onto the adapter board.
  3. plug in the rev 3 board and wifi adapter.
  4. clean up the wiring harness
  5. connect 12v to power up the board and test that it is working. login to the wifi interface.
  6. Use fresh screws to attach the board to the carrier and bolt it back in place using the allen head screws.
  7. connect the gate drivers to the adapter board
  8. see rev3 board page

Proprietary Connector

Not all pins of the connector are available. The top group are blanked off, so the brake and BMS signals are not available.

The resolver and CAN bus signals remain on the same pins as used by Nissan. If other signals are required then they must be added to the female connector.

The Toyota hybrid series car inverters (Gen 3 Prius confirmed) use the same connector.

A 3D printable plug for the 35pin ampseal connector may work in this instance.(originally designed for the Prius gen 3 inverter)

https://openinverter.org/forum/viewtopic.php?f=14&t=836

orginal form post with a set of variants

https://openinverter.org/forum/viewtopic.php?f=14&t=488&start=100#p11671

There are multiple part numbers for the large 35 way Ampseal through hole socket, with small mating differences, be sure to get a matching pair.

TE connectivity 776164-1 and 776163-1 are a matched pair. Look for the male connector that comes with a gasket.