Intelligent key port aka fobgina question

rudi · 03-11-2010, 03:24 AM

Quote:

Originally Posted by FricFrac

Its likely inductive coupling (kinda like the "wireless" chargers for the phone with 40,000 fart applications.... what's the commercial name? Oh yea the iPhone). It probably induces a current in a winding or trace on the PCB in the Fob when you place it in the fobgina. That gives the Fob power so the RFID can be transmitted to the ECU with a dead Fob battery. Its not a simple switch - its an inductive power supply.

That sounds like a good answer to me

Modshack · 03-11-2010, 10:10 AM

Quote:

Originally Posted by FricFrac

Its likely inductive coupling (kinda like the "wireless" chargers for the phone with 40,000 fart applications.... what's the commercial name? Oh yea the iPhone). It probably induces a current in a winding or trace on the PCB in the Fob when you place it in the fobgina. That gives the Fob power so the RFID can be transmitted to the ECU with a dead Fob battery. Its not a simple switch - its an inductive power supply.

...Corvettes have a similar set-up/fob slot

steveg78 · 03-11-2010, 11:08 AM

Thanks! Now that is a more constructive answer! Geeze 2 pgs of smart *** replies just to get an answer to a real question.

JACKPAC · 03-11-2010, 11:13 AM

Quote:

Originally Posted by steveg78

Thanks! Now that is a more constructive answer! Geeze 2 pgs of smart *** replies just to get an answer to a real question.

Welcome to the internet!!

m4a1mustang · 03-11-2010, 11:21 AM

Lol

Educ8r · 03-11-2010, 11:25 AM

Love it!

Quote:

Originally Posted by m4a1mustang

go stick something in it and start it up. Report back.

semtex · 03-11-2010, 11:49 AM

Did you guys know our fobs work with no battery? I know, wtf is this guy talking about, right? But I've tried it. I've removed the battery, gotten in my car with dead fob in pocket. Car starts right up.

antman22 · 03-11-2010, 12:06 PM

Quote:

Originally Posted by semtex

Did you guys know our fobs work with no battery? I know, wtf is this guy talking about, right? But I've tried it. I've removed the battery, gotten in my car with dead fob in pocket. Car starts right up.

As said earlier, its most likely using an RFID chip so the Z can just scan for that. The battery is mainly for the remote functions i believe (lock/unlock/panic).

semtex · 03-11-2010, 12:17 PM

Quote:

Originally Posted by antman22

As said earlier, its most likely using an RFID chip so the Z can just scan for that. The battery is mainly for the remote functions i believe (lock/unlock/panic).

Right, that's exactly what's happening. So here's what I can't figure out -- why do we need a fobgina at all then? What am I missing here?

WhiskeyHotel · 03-11-2010, 12:18 PM

Quote:

Originally Posted by antman22

As said earlier, its most likely using an RFID chip so the Z can just scan for that. The battery is mainly for the remote functions i believe (lock/unlock/panic).

Yep - that's the beauty of passive RFID.

Hugoneus · 03-11-2010, 01:07 PM

The principle operation of the FOB inside the keyhole is the same as RFID tags. The keyhole powers the FOB if it has no battery.

semtex · 03-11-2010, 01:31 PM

Quote:

Originally Posted by Hugoneus

The principle operation of the FOB inside the keyhole is the same as RFID tags. The keyhole powers the FOB if it has no battery.

But why do you need to power the fob at all? You don't need to power it to start the car. It's passive RFID, and you can start your car -- fob in pocket -- even with the battery completely removed. The only thing the fob needs power for is for the lock/unlock/horn buttons to work, and to be able to lock/unlock the doors by just pressing the button on the outside of the door. Well, you're not going to be using the buttons on the fob while it's in the fobgina for obvious reasons. And there's no reason to get out of the car while the fob is in the fobgina to hit the external door lock button. I just don't see the functional value of the fobgina. It's not like it recharges a dead battery or something.

antman22 · 03-11-2010, 02:08 PM

maybe its in there because as guys, we inherently like to stick stuff in holes.

im just happy that we have the ability to leave the keys in our pocket and we aren't required to use the fobgina (like in bmws). the nissan keyless entry system works better IMO than some of the others. my friend's camaro has remote start but when you get in the car, you still have to insert the key and turn. what sense does that make? the only good thing that does is allow you to turn on the AC before getting to your car. if the biggest issue of the nissan system is a fobgina that may not serve any purpose, im ok with that.

VCuomo · 03-11-2010, 02:18 PM

Quote:

Originally Posted by antman22

maybe its in there because as guys, we inherently like to stick stuff in holes...

Now that's the most intelligent answer of this entire thread so far!

Jeffblue · 03-11-2010, 02:59 PM

so none of you got the button battery replacement warranty? it only cost me $3,500. Now whenever my fob battery runs out i get a new one FREE. i dont care what you guys say. $3,500 for free button batteries for as long as i own the car.... SICK DEAL

03-11-2010, 11:21 AM	#20 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Lol __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

03-11-2010, 11:49 AM	#22 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	Did you guys know our fobs work with no battery? I know, wtf is this guy talking about, right? But I've tried it. I've removed the battery, gotten in my car with dead fob in pocket. Car starts right up. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

03-11-2010, 01:07 PM	#26 (permalink)
Hugoneus Base Member Join Date: Feb 2010 Location: Milky Way Posts: 245 Drives: 2010 370z T+S+N 6MT Rep Power: 15	The principle operation of the FOB inside the keyhole is the same as RFID tags. The keyhole powers the FOB if it has no battery. __________________ 2010 Cherry Black Nissan 370z + Black Interior + 6MT Touring + Sport + Navigation + Painted Splash Guards + Illuminated Kick Plates + Fog Light + Floor Mats + Clear Bra

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03-11-2010, 11:08 AM	#18 (permalink)
steveg78 Track Member Join Date: Apr 2009 Location: MD Posts: 569 Drives: 09 370Z PG M6 +Sport Rep Power: 17	Thanks! Now that is a more constructive answer! Geeze 2 pgs of smart *** replies just to get an answer to a real question.

03-11-2010, 02:08 PM	#28 (permalink)
antman22 Track Member Join Date: Dec 2009 Location: Dallas TX Posts: 597 Drives: 09 PG 370z 7AT Rep Power: 16	maybe its in there because as guys, we inherently like to stick stuff in holes. im just happy that we have the ability to leave the keys in our pocket and we aren't required to use the fobgina (like in bmws). the nissan keyless entry system works better IMO than some of the others. my friend's camaro has remote start but when you get in the car, you still have to insert the key and turn. what sense does that make? the only good thing that does is allow you to turn on the AC before getting to your car. if the biggest issue of the nissan system is a fobgina that may not serve any purpose, im ok with that.

03-11-2010, 02:59 PM	#30 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 37	so none of you got the button battery replacement warranty? it only cost me $3,500. Now whenever my fob battery runs out i get a new one FREE. i dont care what you guys say. $3,500 for free button batteries for as long as i own the car.... SICK DEAL