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Joined: Mon Sep 13, 2010 9:31 pm

I-Key System Fault

Wed May 18, 2011 12:50 am

Today I went to start the car and got "I-Key System Fault" on the dash display.

As far as I can tell, the car seems to run fine, and all i-key functions continue to work. Remote door lock/unlock, Drive/Reverse/Park, etc.

It pops up the "I-Key System Fault" on every startup and shutdown.
I tried both keys, same result.

Any ideas?

I did try the proximity key power on p5-10, but no change. Seems like the battery is fine. There is just some stuck message about "I-Key System Fault".

Posts: 166
Joined: Sun Aug 15, 2010 2:31 am

Re: I-Key System Fault

Wed May 18, 2011 5:21 am

The i-Key is the RFID, which is different than the lock unlock buttons.

The car still starts and runs properly?

Probably encountered a one time error, and won't clear the fault until it meets a dealer, or you drive a certain distance. Maybe pull the 12 volt and see if it resets the error codes?

Jeep computers used to do that all the time over the gas cap.

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Joined: Wed Dec 15, 2010 10:01 pm
Delivery Date: 20 Nov 2011
Location: Costa Mesa, CA

Re: I-Key System Fault

Wed May 18, 2011 7:34 am

Hum..... Go to I-KEA? ;)

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Delivery Date: 25 Mar 2011
Leaf Number: 568
Location: Hillsboro, Oregon, USA
Contact: Website

Re: I-Key System Fault

Wed May 18, 2011 8:45 am

I would test both keys independently of the vehicle. It could still be a battery issue.

Does Nissan/Infiniti have any other vehicles with the same keyless start? I don't know what else you own, but maybe it's some RF (radio-frequency) interference?
Mikiko (2011 Nissan LEAF ETEC) Status:
Reserved: 04/20/10 | Ordered: 10/01/10 | EV Project Blink Installed: 03/22/11 | Delivered: 03/25/11 | VIN: 568

Oregon Electric Vehicle Association | Electric Auto Association

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Joined: Mon Sep 13, 2010 9:31 pm

Re: I-Key System Fault

Wed May 18, 2011 10:38 am

Both keys worked fine before, and indeed continue to "work" fine. The only oddity is this persistent warning at every startup and shutdown.

Very strange.

I did try both keys, one at a time, and with the proximity ring for power. All normal.

It's like there was once a system fault, and now the car will remember it forever.

I also tried the 12v-disconnect/reboot idea, just to see.
All that accomplished was resetting my clock to 12:00 and putting back the Leaf startup sound. :)

It did not clear the I-Key System Fault.

It appears I'm in for a CONSULTation with Mossy Nissan.

Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: I-Key System Fault

Wed May 18, 2011 3:46 pm

And just like it appeared, it vanished!

No more "I-Key System Fault" displayed on startup and shutdown.

In unrelated news: Carwings control (remote polling via web page) stopped working.

Think twice before you disconnect that 12v battery, folks.. it appears to have knocked my telematics offline.

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Joined: Wed Apr 26, 2017 11:33 am
Delivery Date: 26 Apr 2017
Leaf Number: 332690

Re: I-Key System Fault

Wed Apr 26, 2017 11:40 am

Did you figure it out?? I have the same issues I have it at the Nissan dealership and they replace the12volt battery
but I-KEY SYSTEM FAULT still showing up randomly... :(

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