Is there an update on this? I now have a 2015 leaf and it is on low-low battery. no quick charge. upon insertion of several different 120 and 240 OEM and aftermarket known good EVSEs, the passenger side blue light blinks for 1 minute, same as OP, and it draws 0.5amp then it stops charging. the proximity pin has 3.8 VDC and the other pin has 800kohm/INF resistance to ground, with +/- and -/+ DMM connection.
my story was I had a 2012 and it was totaled, and the criminal's insurance paid me actual cash value, not replacement cost, so I could only afford this one, with a known charging issue hoping it was only the diode issue. Body is in OK shape, inside is immaculate, and it shows 12 health bars, but i need to solve this same issue.
I tried to scan codes with leaf-spy lite and also with my trusty innova 5210, both said no connection for engine codes. but the innova was able to scan ABS codes C1109(Vehicle battery voltage abnormal) and C118C (EV HEV System.) I checked every fuse in all 4 fuse boxes under the hood and the driver door panel.
I tested the control pilot signal today and the CP is +12vdc when the handle is not engaged (measured inside the EVSE box). then when its inserted into the car the volts got to -10.1VDC, the light blinks for 1 minute and turns off and the voltage was -9.8VDC. so I applied the diode to the CP wire in the car and the voltage was -9.7vdc during that time, so that is not the issue, the diode isn't. According to wikipedia the CP signal being -12vdc is status "F" error
vehicle detected should be +9VDC (status B) charging should be +6VDC (status C)