Key fobs don't work
 

Hi everybody,

for some time my key was not working well and it stopped working last week.
I change the battery of these keyfob by Duracell and I still have the same problem. Does the key need to be trained ?
Need I check some fuse for keyfob ?

Thank you very much for your help :hello:

Did your key light ever illuminate on dash, showing the battery was getting weak?

Hi

Sorry, I couldn't tell you because I just bought the car ... and the message was in German because the car is from germany :/

I cannot open door and start engine with keyfob :(

Put key fob in slot provided & then try

And yes, it’s possible for the key fobs to lose program....

Just noticed that you’re in France, I know things on these cars are programmed differently for other countries.
As the key fob normally has a range of about 33’ in the US

Yes It’s work with the slot beside the steering.

Key Fob don't work
 

Really, how can I know please ? I see a Tutorial on YouTube for infiniti and Nissan Juke but nothing for 350z

Could be a bad antenna. IIRC, there's at least 2 of them.

Key Fob don't work
 

Where can I find them please ? Is it easy to change ?

FSM. Link in my sig.

I don't know what is involved. FSM will have R&R procedures to give you an idea of how difficult the job is.

There's an antenna inside the center armrest/consle/whatever on top of the tranny hump. There's another antenna on the rear of the Z behind the bumper.

You should probably try replacing the fob battery before you start pulling the Z apart.

Sent from my SM-G955U using Tapatalk

Well you might have just got a bad new battery. A lot of times these button batteries sit on shelves for years in the store. Try another set from some other store, and are both key fobs doing the same thing? You should have gotten two when you got the car.

I have this problem on these 2 key fobs. I buy Duracell battery (CR2032) on AMAZON (shipped and sold by amazon). The battery dates from April 2020 and I already tested with voltmeter. I went to Nissan dealer, they don't know where the problem comes from .... In France, Nissan mainly sells nissan Micra and Nissan Quasqai. They don't have a good knowledge of the 370z .... :crying:

Do you think this is the antenna? If so, at least one antenna would work, right?

The console antenna, I believe, is the one that allows the car to start. There are antennas under the rear bumper and on the drive side behind the front bumper. If you can't unlock or start the car w the fob, that suggests to me that either a fuse blew or your fob lost its programming.

I should check the fuse first, do you know what fuse is? Please

See Post #11

I'm still in search ... :/,


Do you know if it is possible to open the fuel door with the key manually ? Now I can't because keyfob doesn't work.
I see this https://www.youtube.com/watch?reload...&v=z8F0-YIlSik

but I don't have this tab :(

thank you

Try This...
Open The Door With The KEY (Inside The Smart Key)
Stick The SMART KEY In The Smart Key Port
START The Car - If It Starts The Smart Key Is Programmed
Then Proceed To Check Battery, Fuse, Antenna

Fsm says fuses in number (number 6 or 9 ).
The fuses box are not numbered by fuse. Maybe it’s only on US.
What is ‘consult’, FSM require ´consult ‘ for check parts. Is it odb analyze ?

CONSULT is Nissan's diagnostic hardware/software. Similar to an OBD analyzer but with more Nissan-specific features. You can often use an OBD tool to get the same info as CONSULT will - sometimes not.

I went to Nissan today ... so I told them all the tests that I did, they say that I have more knowledge than them :D

they unlocked the gas door by CONSULT but they say that they cannot access the calculators (I don't know what the exact word is in English)
Either they don't know how to use CONSULT on the Z or I have a big problem with the car ....

I had asked the question on a French group on facebook. A person had the same problem and he told me that it was a calculator box (for unlock/lock) below the glove box.

Maybe it's this parts : https://www.nissanpartsdeal.com/part...tra2=&filter=()

parts B (28959X)

https://www.nissanpartsdeal.com/reso...f497070f45.png

if so, can it be changed without the intervention of nissan (need ecu tune ?) ?

Thank you for your help

It could be that. But sorry, I don't have any experience with your issue or have done anything with the computers in this car.

If it were me, I would try and buy a used one off ebay or junk yard and try first if you try and do it yourself.

Maybe not helpful but I wanted to say make sure nothing is in your OBDII port because it might interfere with key fob.

Hi everybody,

the keyfob works :D (I do not know how)
After a few weeks it works great !!!

As I said in this post :

http://www.the370z.com/exterior-inte...problem-3.html

My 2 keyfobs doesn't work but sometimes it's work.

Yesterday I washed under the hood with a high-pressure cleaner (just on the sides) and the key started walking again. 3 hours later it doesn't work...
Today I did the same thing, but just on the battery side, I waited a few minutes and it worked.
A few minutes later it doesn't work and when I close the hood, it works again.
I think there is a contact failure or the ground ... I tried to search on FSM but I didn't find anything. So something is not powered to detect the key...

Does anyone know where this could come from please ?

Try the fobs in the fobgina. If they work that way, then I suspect that you have an antenna problem.

Key Fob don't work
 

In fobgina it works perfectly.
From what I understood from this link : Intelligent Key and BCM Troubleshooting

There are many antennas (outside key antenna and inside key antenna). It's said : 'Generally when the request switch is pressed, the BCM energizes only the respective door antenna.'

So I tested today, buttons (unlock/lock) on the keyfob didn't work, I pressed 5 seconds on the switch button of the driver side door and pressed again just once, it's working fine.
I can unlock/lock with buttons on keyfob (even when I am 10m (33ft) away) and I can start the car normally (keyfob in pocket).When the engine is started and when I'm get out of my car, he detects that I am going out with an alarm. I don't think that it was an antenna because after doing this (press 5 second on switch button), keyfob works perfectly but it only works for a few minutes or a few hours when the car is closed.... Example : When I drive, I have no problem with the keyfob. My car continues to detect the keyfob in my pocket . But when I take my car after work or restaurant, keyfob doesn't work.
For it to work again, I must press 5 seconds on the switch button of the driver side door and press it again just once ....every time the keyfob no longer works.

In any case, something triggers the proper functioning of the keyfob when I press the switch button on the door.

You can see by this video : https://www.youtube.com/watch?v=C5YoHEkZud8

Inside the house when keyfobs work’s perfectly: https://www.youtube.com/watch?v=RroUMO_7F58

Looks like you have figured out a way to use your fob. Life is good again.

Sounds like it might be one of those weird problems that can be caused by a weak battery. I'd try putting the battery on a charger overnight and see what happens.

I already do this, I buy a new battery "Varta D47 12 V 60Ah 540 Amps" on Amazon. I had put the battery to charger overnight by this charger https://www.amazon.fr/InThoor-Intell...e%2C158&sr=1-4
I already test with another battery of my friend. The problem is always present :(
Keyfobs batteries are new (duracell CR2032).

This problem occurred since the old battery died. Before it worked correctly.
My car is from Germany and for register this car in France, I needed to wait 1 month so I didn't drive my car during this time...
the old battery was died, so I changed to a new battery and since then I have the problem with keyfobs ....

Some people reading this post must be thinking why I am not going to Nissan..
I already go to Nissan, they are not competent for resolve my issue. They haven't the 'Signal Tech-II (J-50190)' to test car/keyfob signal... they dont' know how to use CONSULT on Nissan 370z...
I already go to many nissan dealer of Paris , I've same response from all. :eek:

did you manage to solve your problem? I have the exact same problem. It's very frustrating sometimes.

For what it's worth:
I recently experienced the same issue. Key fob suddenly stopped working, and my backup key fob also didn't work. I replaced batteries in both, and cleaned the contacts really well, but no dice. I double-checked the new fob batteries, and they registered 3.3 volts. So I figured the problem must be in the car's receiver.
I was about to take the car to the Stealership when I decided to make a Hail Mary move: I bought another set of new fob batteries from a different store. Now both fobs work!
There are two lessons here:
1. Even if a new battery shows full potential (i.e, voltage), it doesn't mean it has sufficient power. Sometimes batteries sit on store shelves for a long time and degrade before you even get them out of the package.
2. Occam's Razor. The simplest explanation for fobs not working is that you have dead batteries. Make triple-sure your batteries are fresh and good before moving on to other theories.
Good luck!
Steve