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2nd Gen Dakota 1997 - 2004 Dakota's

Alarm goes off when unlock is pressed

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  #1  
Old 08-23-2011, 08:44 PM
sledhead25 sledhead25 is offline
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Default Alarm goes off when unlock is pressed

Every time I hit the unlock button on my key-fob the horn starts going off and the lights flash. When I pull the horn fuse the alarm doesn't go off. I work at a used car dealership and I'm wondering if the signal from the other fobs confuse my trucks signal. Also I'm wondering if for some reason my truck get too hot sitting an the sun and gets a mixed up signal when i try to unlock it after work. Any thoughts or suggestions would be helpful
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  #2  
Old 08-23-2011, 08:47 PM
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somebody else said it'll do it after you hit lock 3 times (which i can confirm), but other than that...
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  #3  
Old 08-23-2011, 09:01 PM
Lebbie54 Lebbie54 is offline
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Does the alarm go off when you put the key in the door?
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Old 08-23-2011, 09:13 PM
magnethead magnethead is offline
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Quote:
Originally Posted by Lebbie54 View Post
Does the alarm go off when you put the key in the door?
Mine does, yes. Only the fob will open it silently. Unless i hit lock 3 times, then the alarm will go off regardless of unlock method.
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  #5  
Old 08-23-2011, 09:17 PM
01SilverCC 01SilverCC is offline
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The other key fobs from the vehicles at the used car dealer very likely do not have anything to do with this problem. If anything, they would only block the signal from your fob to your truck, causing your fob not to work at all. This sounds to me like there is a problem with the factory keyless/alarm, which is an internal part of the Central Timer Module. You might try unplugging the CTM for a few minutes, then plug it back in, see it that resets the alarm module, and try the fob again.

Jimmy
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Old 08-24-2011, 09:41 AM
Lebbie54 Lebbie54 is offline
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Quote:
Originally Posted by 01SilverCC View Post
The other key fobs from the vehicles at the used car dealer very likely do not have anything to do with this problem. If anything, they would only block the signal from your fob to your truck, causing your fob not to work at all. This sounds to me like there is a problem with the factory keyless/alarm, which is an internal part of the Central Timer Module. You might try unplugging the CTM for a few minutes, then plug it back in, see it that resets the alarm module, and try the fob again.

Jimmy


Wish this was around when my parents had this car. We had that same problem for years.
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  #7  
Old 08-25-2011, 03:23 PM
sledhead25 sledhead25 is offline
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The first time I tried to unlock the door with the key the alarm didn't go off but the next 2 times it did. I will try to unplug the CTM and see what happens
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Old 08-25-2011, 05:05 PM
moparman_2004 moparman_2004 is offline
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you may need to replace the ctm if resetting it does not work
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Old 08-26-2011, 06:23 AM
JBs DAK JBs DAK is offline
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Mine does that. Know idea why.
Sometimes, to lock it, I hit the button while
walking away,.. I won't hear it chirp. Of course
I then hit the button again,.. Nothin. no chirp.
Hit the button a THIRD time and there it goes!
The alarm goes off! But, what is happening I think,..
Is that each of the 2 prior times that I hit the button,
the alarm is really being set. (Because, I can look into
the truck & see the alarm-light on the dash blinking).
The third hit of the button sets it off. So, sometimes it
chirps while setting the thing. Sometimes it doesn't.
But, it's always setting it reguardless.
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  #10  
Old 08-26-2011, 09:14 PM
sledhead25 sledhead25 is offline
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I unplugged the CTM last night and let it sit for awhile, plugged it back in and today the alarm didn't go off. I'll see what happens on Monday. Hopefully that will work.
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Old 09-14-2011, 11:27 PM
sledhead25 sledhead25 is offline
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So after I unplugged the CTM the alarm didn't go off when I pushed the unlock button for about 2 weeks. Then this Monday the alarm did go off, Tuesday it didn't go off and today it did. I noticed that the horn only honks 3 times then it stops. Sense it is still happening does that mean that I have to replace the CTM?
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Old 09-15-2011, 12:13 AM
01SilverCC 01SilverCC is offline
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Sounds to me like the alarm module inside the CTM may be bad or on its way out finally. Here's an idea for you, maybe you can try it. If the keyless entry part of the security system is still working OK, that is to say, if the doors still lock and unlock with the keyless entry remote fob and the dome lights still come on when you unlock the doors with the key fob, you might try disabling the alarm part of the keyless entry.

At the CTM, look at plug connector #2, I guess it is the one in the middle. On that plug at pin #14 is a light green wire with an orange stripe. This is the factory alarm arm and disarm wire, it is the signal wire from the door lock mechanism in the driver's door and it tells the CTM whether to arm or disarm the factory alarm, based on the lock or unlock input from the remote control fob. Cut the green/orange wire in two. Then operate the keyless remote and be sure you still have the lock and unlock/dome light supervision functions. Keep in mind that cutting the alarm arm/disarm wire will only work if the lock and unlock functions still work now, before you cut the arm/disarm wire.

If this does not work and you still have problems with the factory alarm going off, you will probably need a new CTM. The Dodge dealer can program the keyless entry remote fobs to the new CTM. There is a post about that here, I do not know whether it works:

http://dodgeforum.com/forum/2nd-gen-...e-program.html

I guess worry about that if/when it happens. Let us know if cutting the alarm arm/disarm wire works. If it does work, and you can do without the factory alarm, it is a lot cheaper this way than replacing the CTM.

Jimmy
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  #13  
Old 09-28-2011, 03:57 PM
sledhead25 sledhead25 is offline
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I was going to try and do that but it quit doing it. I guess I will keep this and if it happens again ill try it but if not i don't know then. if it happens again ill let you know how it goes
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Old 11-11-2011, 11:18 AM
sledhead25 sledhead25 is offline
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The alarm started going off again so I did what 01SilverCC said and it worked for a few days but is still doing it. Does that tell me that I need a CTM?
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  #15  
Old 11-11-2011, 04:54 PM
01SilverCC 01SilverCC is offline
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The factory alarm must be bad for it to panic like that even with the arm/disarm wire cut. Because the alarm is an internal part of the CTM, you will very likely need to replace the CTM to fix the problem. The Dodge dealer can check the CTM with the DRB3 scan tool but they may not be able to find out very much unless the problem occurs while they have the truck in the shop. If it were my truck I would take it to the dealer, see if they can shed some light on it.

Jimmy
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Old 11-12-2011, 12:59 PM
sledhead25 sledhead25 is offline
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I have access to a NAPA scan tool and Snap-on's newest scan tool would either one of those be able to help me out
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Old 11-12-2011, 01:32 PM
01SilverCC 01SilverCC is offline
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If the scan tools have the Dodge specific info and is able to communicate with and command the PCM and CTM test and programming functions, then yes it should work. I always thought the DRB had proprietary scan and program info that is not found in other scan tools. You have nothing to lose by trying the Napa and Snap On scanners, if they don't work then you could have the dealer check it out.

Jimmy
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Old 11-12-2011, 01:32 PM
 
 
 
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