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viper 5901 problem

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kevins163 
Member - Posts: 4
Member spacespace
Joined: July 11, 2010
Location: Louisiana, United States
Posted: July 11, 2010 at 11:01 AM / IP Logged  
i have a viper 5901 alarm on a impala ss 2008. when i arm the alarm it arms but then it will say door open on the remote sometimes trunk open. 20 mins later the full alarm goes off and say door open or trunk open. can somebody please tell me why this is happening. i took it over to an authorized viper dealer and they don't know whats going on. please help me its annoying to have this happen at 3 a.m or 4 a.m please help.
ks
tedmond 
Gold - Posts: 4,610
Gold spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January 06, 2007
Location: Ontario, Canada
Posted: July 11, 2010 at 8:47 PM / IP Logged  

you need to isolate door triggers from the bcm.when the bcm goes to sleep, it sends pulses out that can set off the alarm.

go to downloads and search gm door triggers

Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert
kevins163 
Member - Posts: 4
Member spacespace
Joined: July 11, 2010
Location: Louisiana, United States
Posted: July 12, 2010 at 3:06 AM / IP Logged  
what does BCM mean ? so this is normal why would it just go to sleep like that and send off signals. Today its working fine. its just some dayz i arm it and like 10 hours later it does it.
ks
cobraguy 
Member - Posts: 26
Member spacespace
Joined: July 20, 2009
Location: Arizona, United States
Posted: July 12, 2010 at 9:27 AM / IP Logged  
My first guess for BCM would be Body Control Module...
Mark Mizenko 
Copper - Posts: 460
Copper spacespace
Joined: October 13, 2004
Location: Pennsylvania, United States
Posted: July 12, 2010 at 10:51 AM / IP Logged  

BCM does mean Body Control Module.   The BCM  consumes alot of current when it's "awake",  Thats the reason it "goes to sleep" after a certain period of time, when it's not needed (car is parked). 

You NEED to do the diode isolation on those triggers.   This technique is used on a few different types of cars,  all for the same reason.

Dodge started this "checking the domelight" on their vans somewhere back around '86-'87 and drove installers crazy.

kevins163 
Member - Posts: 4
Member spacespace
Joined: July 11, 2010
Location: Louisiana, United States
Posted: July 12, 2010 at 11:55 AM / IP Logged  
Wow i appreciate this help so much it just went off again this morning. So what i have to do is open the door arm it of course its go say door open unarm it then shut the door then arm it and its good for lawd knows how long probably another 10 hours or so. but do you know exactly how long it will take for it to go to sleep ? cuz with the viper system it said if u haven't touch the alarm in 72 hours the remote goes to sleep like it won't receieve signal until u press a button.
ks
Mark Mizenko 
Copper - Posts: 460
Copper spacespace
Joined: October 13, 2004
Location: Pennsylvania, United States
Posted: July 12, 2010 at 1:43 PM / IP Logged  

Cant tell exactly how long it will take to go to sleep.  10-15 minutes most times.  But it depends if the BCM is sensing a draw.

howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: July 13, 2010 at 5:20 PM / IP Logged  
You need DEI 1076 to cure this. Should be on this site. Yes we have this problem in the UK mainly the Ford GEM module but also BCM on some VWs which luckily for you aren't available in the US.
joseloezajr 
Member - Posts: 1
Member spacespace
Joined: July 14, 2010
Location: Mexico
Posted: July 15, 2010 at 12:13 PM / IP Logged  
you can also add a 1k resistor from you negative door triger of the 5901 to 12+ this will eliminate the pules sended by the BCM
kevins163 
Member - Posts: 4
Member spacespace
Joined: July 11, 2010
Location: Louisiana, United States
Posted: July 15, 2010 at 2:28 PM / IP Logged  
Well i can tell you this i did do anything special to it but when the alarm goes off and say door open / trunk open. I open the door and trunk then set it while its open. unarm it then close it then arm it again and since i did that for whatever reason it haven't false alarm since sunday and today is thursday morning. idk why it haven't did it yet but i guess it was magic
ks

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