Make sure everything is connected as should be that you can see. Disconnect battery. Leave 5 minutes. Reconnect battery. See if the fault returns again.
Whilst I totally agree with what you are all saying Samsung cannot/will not do anything more unless they have the complaint reference numbers from Nissan on the problem. That unfortunately is the way it works. I no longer have the S4 and the problem has gone away.
If S4 owners want a resolution to this matter you need to report the matter to Nissan and give me the reference number. If I receive no futher info by 6pm tomorrow that is my involvement in the matter at an end and maybe someone else will take up the gauntlet. I have got rid of my S4 now.
There are those who want to work and those that don't. Whatever you do that will never change. I think there should be time limits in place before you must work for your benefit, giving people time to find a job before the big stick is imposed.