Thekuai said:
Did Nissan EV affairs help you at all?
If this was my car, this is what I'd do:
1) Go to a junkyard and get the brake controller from a wrecked 2013-2017 Leaf. There are a bunch of model numbers. Any of these should work:
https://www.wholesalenissanparts.com/oem-parts/nissan-master-cylinder-460074np3e
https://www.nissanpartsdeal.com/parts/nissan-control-asmy-br~46007-3nf5a.html
https://www.nissanpartsdeal.com/parts/nissan-control-asmy-br~46007-3nf9a.html
https://www.nissanpartsdeal.com/parts/nissan-control-assy-brake~46007-4np0a.html
While I was there, I would ALSO get the ABS sensor 47660-4NA1A:
https://www.nissanpartsdeal.com/parts/nissan-actuator-asmy-a~47660-4na1a.html
If you want new parts instead, you could buy the 4NP3E directly from the first link. It's $1500. You might do the repair and find it doesn't work. if it doesn't, you'll also have to replace 47660-4NA1A, which costs another $1000 new.
2) Install the Brake controller (46007-XXXXX) yourself or go to an independent mechanic/dealer and have the part installed. The dealer is likely more expensive.
3) Clear DTC's via LeafSpy. CAN and Brake codes gone?
a) Yes? Awesome. Continue to 5.
b) No? Install the ABS controller (47660-4NA1A).
4) Clear DTC's via Leafspy. CAN and brake codes gone?
a) Yes? Awesome. Continue.
b) No? You must have a wiring problem on the CAN bus. Check wiring or have a mechanic check and replace wiring.
5) Take the car to the dealer and have them do two things:
a) Reset the Angle Sensor neutral position (BRC-60). This must be done anytime the ABS unit is replaced and can only be done by Consult (dealer tool)
b) Update the brake controller firmware to the latest version, even if your car doesn't show an active recall. The part you pulled may not have the latest brake controller FW.
Firmware updates should run you $150-300. Using Junkyard parts, this whole repair could likely be done for <$1000.
P.S. I see you live in New York. I know a guy in New York that has 5 wrecked Leafs. I don't know if he has these parts, but he'd likely pull them for you for a low cost, if you were interested. He's a great guy and helped me with some hard to find wiring harnesses for my backup camera project.