Alarm keeps going off

tindo · 12-17-2012, 02:16 PM

Just got a 325i 2003 but alarm keeps goong off when i lock yhe car, checked doors, trunk, engine bonnet, sunroof, all closed tight. What could be the problem?

Mango · 12-17-2012, 02:48 PM

Quote:

Originally Posted by limpiabota809

Maybe fuse?

Please tell me, just exactly how could a fuse cause an alarm to go off?

OP: try unplugging your hood sensor (by the drug bin). often times it's been known to be that on the E39 models.

limpiabota809 · 12-17-2012, 03:29 PM

deleted post for incorrect information

GodsSon · 12-17-2012, 03:50 PM

when I first got the viper alarm system it would go off all the time. Eventually found out that it was something to do with the trunk sensor. I removed the fuse for the trunk sensor and its never given a false alarm since. Think it was something to do with the trunk light, but that would mean the trunk light goes off and on randomly at all times?

VALMONT · 12-17-2012, 03:56 PM

my 2003Ci OEM BMW alarm did that until i replaced the hood sensor (by the drug bin) it's less than $10 and is a 30 second no tools swap.

shovelit · 12-17-2012, 06:46 PM

Do yo have a scanner like PAsoft?

tindo · 12-18-2012, 01:07 AM

thanks for all the advice, sorry dont have a scanner. I will try to replace the hood sensor. Where is the trunk sensor though? have tried to look for it but have not found it.

scottjoh · 12-18-2012, 11:12 AM

The hood sensor is the most common source of the alarm going off for no apparent reason, but, the actual source is stored in the GM5's shadow code memory. If you want to be sure you need to get the fault codes read out. If you are content shooting in the dark then start with the hood sensor,

Woowar · 01-06-2013, 05:01 PM

I have a 2005 M3 convertible and have had a similar problem. I noticed the alarm went off after I had been in the glove compartment. Once closed with a bit of force the alarm stopped going off. Might be worth a try.

scottjoh · 01-06-2013, 05:12 PM

Sure if you don't mind trying and trying and trying until you happen to hit upon the source of the problem that's fine. If you want to get right to the source of the problem you need to read the fault codes stored in the GM5. It will tell you exactly what set off the alarm and how many times it's happened.

Woowar · 01-06-2013, 05:44 PM

How do you get the fault codes from the GM5, how much is the equipment or how much for a garage to get them off?

tindo · 01-06-2013, 11:56 PM

Thanks guys, it turned out to be the hood sensor, after I disconnected it, the problem has disappeared, just need to replace the hood sensor now.

Woowar · 01-07-2013, 03:02 PM

Looks like mine may be the same after all. Let me know how much a bonnet sensor is when you get one please? Ta

tindo · 01-14-2013, 12:33 AM

R585 from BMW

12-17-2012, 02:16 PM	#1
tindo Registered User Join Date: Dec 2012 Location: Johannesburg Posts: 8 My Ride: e46 325i 2003 View My Garage	Alarm keeps going off Just got a 325i 2003 but alarm keeps goong off when i lock yhe car, checked doors, trunk, engine bonnet, sunroof, all closed tight. What could be the problem?

12-17-2012, 03:50 PM	#4
GodsSon Registered User Join Date: May 2009 Location: Mississauga Posts: 64 My Ride: 325i View My Garage	when I first got the viper alarm system it would go off all the time. Eventually found out that it was something to do with the trunk sensor. I removed the fuse for the trunk sensor and its never given a false alarm since. Think it was something to do with the trunk light, but that would mean the trunk light goes off and on randomly at all times? __________________ In God we Trust...all others Pay Cash. _________________________________________________________

12-17-2012, 03:56 PM	#5
VALMONT The De46vil's Army Join Date: Oct 2002 Location: So Cal Posts: 21,082 My Ride: 325Ci, Passat View My Garage	my 2003Ci OEM BMW alarm did that until i replaced the hood sensor (by the drug bin) it's less than $10 and is a 30 second no tools swap. __________________ Garage Queen

01-06-2013, 11:56 PM	#12
tindo Registered User Join Date: Dec 2012 Location: Johannesburg Posts: 8 My Ride: e46 325i 2003 View My Garage	Thanks guys, it turned out to be the hood sensor, after I disconnected it, the problem has disappeared, just need to replace the hood sensor now. Last edited by tindo; 01-06-2013 at 11:57 PM.

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12-17-2012, 03:29 PM	#3
limpiabota809 Registered User Join Date: Oct 2012 Location: NYC Posts: 622 My Ride: 330 XI View My Garage	deleted post for incorrect information

12-17-2012, 06:46 PM	#6
shovelit Registered User Join Date: Oct 2012 Location: Pittsburgh PA Posts: 220 My Ride: 03 325xi View My Garage	Do yo have a scanner like PAsoft?

12-18-2012, 01:07 AM	#7
tindo Registered User Join Date: Dec 2012 Location: Johannesburg Posts: 8 My Ride: e46 325i 2003 View My Garage	thanks for all the advice, sorry dont have a scanner. I will try to replace the hood sensor. Where is the trunk sensor though? have tried to look for it but have not found it.

12-18-2012, 11:12 AM	#8
scottjoh Registered User Join Date: Aug 2008 Location: Torrance, CA Posts: 1,457 My Ride: 1999 323i - TiAg View My Garage	The hood sensor is the most common source of the alarm going off for no apparent reason, but, the actual source is stored in the GM5's shadow code memory. If you want to be sure you need to get the fault codes read out. If you are content shooting in the dark then start with the hood sensor,

01-06-2013, 05:01 PM	#9
Woowar Registered User Join Date: Dec 2012 Location: England Posts: 5 My Ride: M3 convertible View My Garage	I have a 2005 M3 convertible and have had a similar problem. I noticed the alarm went off after I had been in the glove compartment. Once closed with a bit of force the alarm stopped going off. Might be worth a try.

01-06-2013, 05:12 PM	#10
scottjoh Registered User Join Date: Aug 2008 Location: Torrance, CA Posts: 1,457 My Ride: 1999 323i - TiAg View My Garage	Sure if you don't mind trying and trying and trying until you happen to hit upon the source of the problem that's fine. If you want to get right to the source of the problem you need to read the fault codes stored in the GM5. It will tell you exactly what set off the alarm and how many times it's happened.

01-06-2013, 05:44 PM	#11
Woowar Registered User Join Date: Dec 2012 Location: England Posts: 5 My Ride: M3 convertible View My Garage	How do you get the fault codes from the GM5, how much is the equipment or how much for a garage to get them off?

01-07-2013, 03:02 PM	#13
Woowar Registered User Join Date: Dec 2012 Location: England Posts: 5 My Ride: M3 convertible View My Garage	Looks like mine may be the same after all. Let me know how much a bonnet sensor is when you get one please? Ta

01-14-2013, 12:33 AM	#14
tindo Registered User Join Date: Dec 2012 Location: Johannesburg Posts: 8 My Ride: e46 325i 2003 View My Garage	R585 from BMW