key not detected

[congie66]

there are sooo many discussions i'm not sure where to enter this, but
the 2015 Genesis 3.8L Coupe will not start
this is 4th straight day, borrowing girlfriend's car
It cannot sense the electronic key that came with the car
Nor does the spare key work
And of course there is no real key or keyhole, drives me nuts,
Batteries are not very old.
Anybody???

 

[Kon]

As far as I know there is a physical key inside the smart key. Should be Section 3 Page 6 in the owners manual, or do a search for "Mechanical Key": https://owners.hyundaiusa.com/conte...nual/2015/genesis/2015_Hyundai_Genesis_OM.pdf

Once you're in the car I think you're supposed to hold the smart key near the start button while you press it. If that doesn't work then I guess you'll need a tow to a dealer.

Do you have any indication that your car's battery is NOT dead?

 

[congie66]

Kon, thank you for this... very helpful: I did discover a physical key inside the smart key! I was excited at first, but in searching for a HOLE to put it in, there appears to be no such thing in my car.
And yes, thank you, I have been holding the fob next to the start button. Also, the battery is strong and only a few months old.
On Monday I will tow it to the dealer.... it seems to me that something like this, that carries huge risk for the owner [what if I were stuck in the desert after getting gas and this happened, etc] would have a better solution. You would think that Hyundai would have designed a back up system of some kind, right?
Again, appreciate your time...
Dave

 

[Mcc]

Do you have any indication that your car's battery is NOT dead?

Yes this is a critical question. Do the headlights or interior lights work and are they strong?

And yes, thank you, I have been holding the fob next to the start button. Also, the battery is strong and only a few months old.

Makes no difference if the battery “should be strong” or only a few months old. Replace the battery with a brand new, name brand one. Cheap and easy.

 

[Kon]

This shows the process in a newer model but I think it's the same for ours:

 

[Mcc]

This shows the process in a newer model but I think it's the same for ours:

Great post. The important point being don’t just hold the fob near the start button but actually press the start button with the fob. No guarantee, but it’s worth a try

 

[larrymg1]

Check out these YouTube videos for assistance.

Hyundai, Kia and Genesis Video Help with Dead Key Fobs

 

[NolaG80]

2017 Genesis G80 key fob, electronics and battery / battery cable issues. The dead electronics were due to a loose battery cable, not the fob in my case.

Hello Folks:

The electronics of my 2017 Genesis G80 completely died twice recently. In the end it was a sort of loose negative batter cable in the trunk. I post the following as it provides what I hope is a good synopsis for others, where the fob battery is the likely issue. I had no prior problems driving someplace, nor any prior issues of any similar note. I got out of the car and then held the button on the key fob to lock the car. Nothing happened. The entire dash was unlit, not even the little red door open led / icon lit up. Never had that happen before. Looked up the issue on the internet. Changed the key fob battery with a new CR 2032. About 30 minutes later as I walked to within range of the car, the doors reacted, the dashboard lit up when I entered and the car started when I pressed the start button. Seemed very strange as the old fob battery was at about 3V. New one was 3.25 on my testing multi meter. There are postings about the load on the battery in use. In brief, for a few dollars get new batteries that were not sitting in a drawer for 5 years. My mechanic checked the car, the car battery located in the trunk (possibly 6 year old H9 / LN6 AGM 950 CCA) and the computer diagnostics. No errors or issues anywhere. (Did not note the loose battery cable.) He had no idea what caused the issue. We agreed that if the car battery was going to die slowly due to its age, the issues should have been different.

This happened again a few weeks later, except this time replacing the batteries on both key fobs and trying to use both seemed to accomplish nothing – except for semi messing up / mauling the first key fob due to all the screwdriver marks trying open it. I called my mechanic. He thought that maybe the electronics would need to be reset at the dealer due to a possible issue between the key fob and the car’s electronics leading to some type of anti-theft electronics shut down. I called a local Hyundai dealer. The person on the phone sort of concurred, but said they would not know for certain until they had the car in the service area. I called for a tow (which never came, LOL). Then we found a YouTube video. Main points and as per this thread:

1. Take out the key from the fob.

2. When facing the driver door handle, at the far right and under the plastic handle part that sticks out from the door there is a little hole that has a small button in it. Due to the paint color of my car it was almost impossible to see but easy to feel. Stick the key into the hole and push up and wiggle it a bit. At the same time, push the plastic part up and maybe rotate the key a little. The plastic part should come off.

3. You can now use the key to unlock / lock the door. I did not test if this locked / unlocked all 4 doors.

4. Once inside some folks talked about a place or 2 where they key itself could be used around the dashboard. I never figured that out or maybe their advice was for different Hyundai / Genesis models or years.

5. If as in my case the electronics are still completely dead, no dash lights, etc, touch the non key side of the key fob to the start button and use the fob to push the start button (as opposed to using your finger to push the start button) AT THE SAME TIME as you are pressing / mashing on the brake. I also had closed the driver door.

On previous attempts the driver door might have been open or closed and maybe I did not touch or only lightly tapped on the brake.

We were shocked that the car “miraculously” started, dashboard lights came on, and seemed normal. Even the dashboard mechanical clock reset itself. Had dinner and tried again. Worked.

Next am I drove to a different dealer, as the first available appointment at the first dealer was in 2 weeks (LOL). They were able to reassemble the screwdriver mangled 1st keyfob (due to trying about 4 different new CR2032 batteries). It worked fine. The rearmost battery cable in the trunk ( - ) lead was completely clean but slightly loose (I emphasize slightly) and fully surrounding and on the negative battery terminal. It was tightened and I let the person do a 30-45 minute battery test and re-charge – which was normal.

Gave the folks some nice tips as they did not even need to do a ticket, so no formal charges J

As an aside I changed out the small spare tire for a full size one from a different car (and yes a thicker less sporty tire). They confirmed that the bolt patterns were the same. Something I never thought to do.

Thank you to the many who provided prior postings in various places, including here and youtube. I hope this is the end of this issue for me and this write up helps someone in the future.

From NOLA and Jazz Fest 2022 with love…..