Remote Key FOB Issues (SE Trim) - Hyundai Forums : Hyundai Forum
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#1 Old 07-05-2012, 11:11 AM
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Remote Key FOB Issues (SE Trim)

So this morning I go to my car, use the remote to unlock it and get in. I hit the brake and press the start button (RF PB Start with SE) but the car just "goes to accessory" but doesn't start. I try several times, even using the console key switch. Car didn't start.

I go in and take the second Keyfob (wife doesn't drive my car) and it starts just fine.

Called a dealer (i moved since purchase) and they said the FOB may have been de-programmed. Great.

So, a few questions, thoughts as to why it would go to accessory but nto start?

Would dealer reprogramming be covered under warranty?

what happens if the other keyfob goes bad and i can't start my car?

Thanks

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#2 Old 07-05-2012, 11:34 AM
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First thing that comes to my mind is that maybe the battery is getting low. I don't know how much "juice" it takes for the radio used for PB start to run vs. the buttons used to unlock it, but I would start by getting a new battery in it before assuming it's been deprogrammed. If a battery doesn't fix the problem, then persue the idea of having it reprogrammed by Hyundai. I don't know why or how that would happen, but I would think they'd cover it under warranty as long as it hasn't been damaged in some way.

As for accessory mode but not starting... that's strange, but leads me to think you have another problem. I just went out to my car and left my fob out of range to see if it would go into accessory mode without the key (simulating it not being able to read the key if the battery were low). All I could get out of it was a message that says "key not detected". That leads me to think that maybe your brake switch is going bad and that it detected your key, but didn't detect that you had your foot on the brake.

If that's the case, but it worked when you got the second key out, maybe it was a fluke thing and it just finally detected the brake when you came back out with the second key. Try several things... try starting your car with the first key again. If it still won't start, try holding the start button down for 10-15 seconds (or a little longer) and see if it'll start. If it does, than you've got a brake switch going bad. This process overrides the switch.

If this process doesn't solve your problem and you can still start it with the second key, but not the first, persue changing out the battery or having it checked by Hyundai to see if needs to be reprogrammed.

I hope you get it all figured out! Let us know how this turns out.

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#3 Old 07-05-2012, 11:43 AM
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Hopefully it is just the battery going bad. I would just replace the battery and see what happens.
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#4 Old 07-05-2012, 12:04 PM
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Something else is going on. Its not the FOB. If it was, it wouldnt even go into accessory. Sounds like the brake sensor issue a lot of people were having.
#5 Old 07-05-2012, 12:04 PM
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brake switch bad? that's not good. especially since i drive 120 miles round trip to work.

how do i open up the battery case for the KeyFob?

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#6 Old 07-05-2012, 12:24 PM
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Originally Posted by psuath View Post
brake switch bad? that's not good. especially since i drive 120 miles round trip to work.

how do i open up the battery case for the KeyFob?
To open the fob, just pull out the key shank. The slot just in front of the hole where the key shank goes in, is where you need to use to open the case halfs. I usually use a dime and twist and the case halfs pop apart.
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#7 Old 07-05-2012, 12:30 PM
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Originally Posted by psuath View Post
brake switch bad? that's not good. especially since i drive 120 miles round trip to work.

how do i open up the battery case for the KeyFob?
If it's the brake switch, it's annoying but not uncommon for these cars. It's a cheap part that the dealership can replace quickly. If your car is under warranty it'll be covered. But try the trick mentioned above to over-ride the brake switch. That should help determine whether or not this is your problem.

If you want to try replacing your fob battery it's pretty easy. Pop the physical key out of it and then look at the bottom where the key was. You'll see a small slot. If you put a flat-head screwdriver in there you can pry the two halves apart. They're just snapped together. When they come apart, the battery is in the back half of the fob. Be careful not to get it wet or anything while its open. It is a computerized part and it's VERY expensive to replace!!

Good luck, and let us know how everything turns out.

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#8 Old 07-05-2012, 12:32 PM
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Thanks Mr. Modern

now, this brake sensor that "might" be bad...does that mean i might have problems applying the brakes while driving?

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#9 Old 07-05-2012, 12:37 PM
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Thanks Mr. Modern

now, this brake sensor that "might" be bad...does that mean i might have problems applying the brakes while driving?
No, it just prevents the brake lamps/cruise control and ESC from being used. You can still brake the vehicle without any issues.
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#10 Old 07-05-2012, 12:37 PM
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Thanks Mr. Modern

now, this brake sensor that "might" be bad...does that mean i might have problems applying the brakes while driving?
No, the brake switch is just what tells the computer that the brake has been applied. Mechanically the brakes will still function like normal.

However, on top of difficulty starting the car, if the brake switch is bad it may also mean that your brake lights don't light up when you apply the brakes. Even though you'll still have full function of your brakes, it's not something to triffle with as it is unsafe to drive around without your brake lights coming on!

I'd recommend the test I mentioned earlier as well as changing the battery in your fob to see if that could be causing your problem. If you think it's the brake switch, even if it's an intermittant problem, get it taken care of ASAP!

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