Smart Key/immobilizer Problem! - Hyundai Forums : Hyundai Forum
 
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#1 Old 05-10-2011, 03:26 PM
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SOZAR
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If anyone has any ideas, I'd be most appreciative. Car is going to dealer on Thursday, but I was wondering if this sounded familiar to anyone:

Here is a description of my Smart Key Problem (this does not happen every time, maybe 1 in 10 or even 1 in 20 times the car is parked):

The car is stopped and put in “P” with the parking brake set. The engine start/stop button is pushed ONCE to turn off engine. The engine stops, but the yellow immobilizer light illuminates on the dash, and the computer screen between the tachometer and speedometer reads “Shift to P” (the car is already in park, obviously, as it has allowed me to turn off the engine). The radio continues to play, and the clock is illuminated. It is as if the car is in “ACC” mode, but I cannot get it to “OFF”. Pushing the engine start/stop button will cycle it to “ON” (where all the warning lights, ventilation, etc come on), but not to “OFF”. The next push of the button returns it to the state it was in when the car was first turned off (immobilizer light, radio on, shift to “P” message).
Exiting the vehicle when it is in this state causes a beeping sound from the security system and the radio and clock remain illuminated. The doors will NOT LOCK using the button on the SmartKey.
The only way I have been able to get the car out of this mode is to actually re-start the engine (not an acceptable solution) and turn it off again. The most recent occurrence was not even solved by doing this; I started and turned off the engine 2 or 3 times, even cycled the transmission from “P” to “D” and back, and it persisted (still gave the immobilizer/shift to “P” message when turned off. I had to leave my car unlocked on the street for ten minutes, with the radio running, while I dropped my kid off at school (this is what I would consider a serious problem). When I then drove the car from his school to work, it shut off normally.


Note:
-The Smart Key is always either in my pocket or in the center console, within a foot of the dash.
-The car has never displayed a Smart Key battery level warning.

Thanks!
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#2 Old 05-10-2011, 03:53 PM
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}{avoc
I haven't heard/read of this problem, but it sounds like a switch or something in the transmission not reading that the vehicle is in park.

If you turn off the engine while in any gear except for park, the car will shut off but stay in ACC mode. Maybe remember to check the dash reading the next time your car starts acting up and see that it reads as being in P and not R?

Little things that you notice like this can at the least help your mechanic diagnose and solve the problem much faster.
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#3 Old 05-10-2011, 03:54 PM
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Rfehlman
Sounds like a bad transmission position sensor. Does indicator in the instrument cluster register the car in "P"?
Let us know what the dealer finds.


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#4 Old 05-10-2011, 04:00 PM
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mrazzino
Isn't there an issue with the shifter not going all the way into P? Like it is a few millimeters short? I haven't read enough about it but I remember seeing that while browsing on the forums. Should be an easy fix if thats the case.
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#5 Old 05-10-2011, 04:11 PM
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SOZAR
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Thanks to all for the feedback! I must admit the transmission sensor angle had not occurred to me, but it makes sense. I can tell the car is in park, but if the computer can't, then of course there'd be a problem. I will look at the dash display next time...again, I greatly appreciate the responses.
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#6 Old 05-11-2011, 11:16 AM
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NBCGLX
My bets are that the gear position switch isn't registering that you've put the transmission in Park. The message you're seeing about shifting to Park backs that up. My mom's early build Sonata had this problem and exhibited the same symptoms as you're experiencing. The dealer installed a new switch and it has been fine ever since. Prior to being able to get the car in for service, my mom was able to work around the problem by jiggling the shifter lever once in Park, applying force in a forward motion.
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#7 Old 05-11-2011, 12:02 PM
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I'm not sure if this would act as a work around, but will the vehicle turn off/on when in N?

If it won't register as in P, you could always switch to N, turn the vehicle off then to P once it's off.
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#8 Old 05-11-2011, 01:52 PM
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Rfehlman
QUOTE (}{avoc @ May 11 2011, 11:02 AM)
Quote:
I'm not sure if this would act as a work around, but will the vehicle turn off/on when in N?

If it won't register as in P, you could always switch to N, turn the vehicle off then to P once it's off.
I was going suggest that too. But that wouldn really be a solution to your problem.
But it could be a temporary fix until you get it into the dealer.

I had a similar type of issue on my jeeps 4wd position sensor there's and easy fix..... Got a Hammer? jk

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#9 Old 05-16-2011, 01:55 PM
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SOZAR
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The car went to the dealer and the problem was indeed within the shifter assembly. The local techs first ran diagnostics of the electrical systems and computer, no problems found. They "adjusted" the shifter assembly, this did not fix the issue. They then called the corporate technical people, who recommended replacement of the shifter assembly. This was done and all appears normal. I can't offer any further info; what I wrote here is from the service paperwork (I picked it up after service department hours so I didn't get to talk to anyone).

PS They also installed an (unrelated) software upgrade to correct an ECM problem that has been showing up. Might want to ask about that one if you are in for service.

Cheers
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