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Old 03-07-2014, 06:05 PM   #1
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Alarm goes off when using key in door on JKU

When I lock the 2012 jeep wrangler unlimited with the keyless entry and than use the key to manually unlock the vehicle the car alarm goes off. Sometimes if I restart the vehicle the alarm goes off, other times it takes disconnecting the battery. The service advisor told me that jeep doesn't have selonoid's in the door so the car doesn't know how it was locked. Therefore if you don't unlock it the same way the alarm goes off. I think he is blowing smoke! I also opened a case with Jeep.

Does anyone know if this is normal?

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Old 03-07-2014, 06:53 PM   #2
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Yes that is normal. The alarm is set up so once armed with the key fob the key fob must also be used to unlock and disarm the alarm. Use the key to lock the door or manually lock with the interior door handle lock and you can unlock with the key.

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Old 03-07-2014, 07:14 PM   #3
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Every car I've ever owned with keyless entry operated the same way. If you lock with the remote you are arming an alarm. If you open the door without disarming that alarm - like when you use the key in the door, or if a naughty person breaks your window and unlocks the door manually to get in - your alarm will go off. No mystery there.
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Old 03-07-2014, 10:35 PM   #4
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I just tried this same thing on a chevy impala and no alarm. Are we sure this is normal?
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Old 03-08-2014, 01:32 AM   #5
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It's normal for the Wrangler because it has no kind of switch to sense that the key was use to unlock the door, like some other cars do. Without that type of switch, the alarm has no way of knowing whether the door was unlocked with a key or jimmied open, so it sets the alarm off when the door opens.
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Old 03-08-2014, 07:30 AM   #6
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Thumbs up Horn blasting

Had the same thing happen last weekend took it to dealer and tech said he replaced the horn switch in the steering wheel, no more honking.
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Old 03-08-2014, 08:56 AM   #7
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When all else fails READ THE MANUAL!!! The OP says he has a 2012 Wrangler JKU. Here is what it says in the 2012 JKU owners manual, pages 19-20.

Quote:
To Arm The System
The Vehicle Security Alarm will set when you use the
Remote Keyless Entry (RKE) transmitter to lock the doors
and swing gate, or when you use the power door lock
switch while the door is open. After all the doors are
locked and closed, the Vehicle Security Light (located on
the instrument cluster) will flash rapidly for about 16 seconds
to signal that the Vehicle Security Alarm is arming.
During this 16-second arming period, opening any door
or the swing gate will cancel the arming. If the Vehicle
Security Alarm is successfully set, the Vehicle Security
Light will flash at a slower rate to indicate the Vehicle
Security Alarm is armed.

To Disarm The System
To disarm the Vehicle Security Alarm, you will need to
press the UNLOCK button on the RKE transmitter, or
turn the ignition switch to the ON/RUN position. If
something has triggered the Vehicle Security Alarm in
your absence, the horn will sound three times and the
exterior lights blink three times when you unlock the
doors. Check the vehicle for tampering.

The Vehicle Security Alarm is designed to protect your
vehicle; however, you can create conditions where the
Vehicle Security Alarm will arm unexpectedly. If you
remain in the vehicle and lock the doors with the RKE
transmitter, once the Vehicle Security Alarm is armed
(after 16 seconds), when you pull the door handle to exit,
the alarm will sound. If this occurs, press the UNLOCK
button on the RKE transmitter to disarm the Vehicle
Security Alarm. You may also accidentally disarm the
Vehicle Security Alarm by unlocking the driver’s door
with the key and then locking it. The door will be locked
but the Vehicle Security Alarm will not arm.

NOTE:
Unlocking the doors with the manual door lock plungers
or the driver’s door lock cylinder will not disarm
the Vehicle Security Alarm.


• When the Vehicle Security Alarm is armed, the interior
power door lock switches will not unlock the doors.
DOWNLOAD A RECENT OWNER'S MANUAL FOR FREE
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Old 03-10-2014, 01:52 PM   #8
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Quote:
Originally Posted by fljeepunlim View Post
I just tried this same thing on a chevy impala and no alarm. Are we sure this is normal?
If the Impala uses the same GM passlock as my old Saturn, you may have some arming time delay.

According to the info above, looks like the Jeep has a similar delay.

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