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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 09-16-2011, 06:30 PM   #21
aeorozco
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what if you do not have any programming software and still wanted to do this mod?
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Old 09-16-2011, 06:31 PM   #22
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what if you do not have any programming software and still wanted to do this mod?
It would be useless to do it.
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Old 09-16-2011, 11:06 PM   #23
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I did the same. You can purchase a 110db piezo siren at Radio Shack for about $6 works great.
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Old 09-16-2011, 11:28 PM   #24
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Has anyone who used a bigger siren long term had problems? I would think you would be overdriving the hell out of the source for that trigger? I would use a relay, it would be loud as hell!
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Old 09-17-2011, 01:18 AM   #25
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Im all for saving money, but I like to think I know when to draw the line. You have car that thiefs love and you yourself love spending your extra time driving and modding....so when it comes time to protect the car you shell out a whole $10?

I have an even better idea for an even cheaper alarm system! how about spending a quarter of the money you spent on your bmw and get a geo metro, this way you dont even need door locks! your safe $250 max for the whole setup!
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Old 09-17-2011, 03:49 AM   #26
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Im all for saving money, but I like to think I know when to draw the line. You have car that thiefs love and you yourself love spending your extra time driving and modding....so when it comes time to protect the car you shell out a whole $10?

I have an even better idea for an even cheaper alarm system! how about spending a quarter of the money you spent on your bmw and get a geo metro, this way you dont even need door locks! your safe $250 max for the whole setup!
first off, if a thief wants your car they will get it no matter what.

second, you do realize this is practically like all other aftermarket alarms..
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Old 09-17-2011, 03:58 AM   #27
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Do you know what those other two pins are for? I've been wanting to install a siren from a newer BMW (E90 etc...), but have always held off since the siren has the tilt sensor built in and is therefore wired differently. If I can figure out the pins I need, maybe I can go through with the idea (the newer sirens are a good bit louder)
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Old 09-17-2011, 04:03 AM   #28
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I did the same. You can purchase a 110db piezo siren at Radio Shack for about $6 works great.
Initially, I tried this with a 105db piezo and it was too quiet, and too high pitched. Suppose the output really depends on the piezo/siren you choose. If anyone without an alarm has access to programming tools, I don't see a reason not to try this out.

Btw GS, this was initially just an attempt to get the chirp when locking/unlocking, since I had the right tools I'm able to enable it as an alarm. If you're satisfied with the OEM alarm that's wonderful, like mike said this isn't much different (minus the tilt/motion sensor). Either way I wasn't going to spend upwards of $500 on the factory alarm. I see you're from Mississauga so I hope you're at least somewhat familiar with the high dealership costs in Canada.
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Old 09-17-2011, 07:34 AM   #29
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The 2nd Set of wires are for a battery backup
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Old 09-17-2011, 09:42 AM   #30
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Do you know what those other two pins are for? I've been wanting to install a siren from a newer BMW (E90 etc...), but have always held off since the siren has the tilt sensor built in and is therefore wired differently. If I can figure out the pins I need, maybe I can go through with the idea (the newer sirens are a good bit louder)
Click for larger image


From looking at the diagram, there are 4 pins.
STDWA - Siren is primed and deactivated via this line
SIRENE - Control signal, DWA siren alarm
30<67 - Term. 30, continuous voltage (+), fuse 67
31L<1 - Term. 31, power, terminal 4

Inputs monitored:
Quote:
Ignition lock (terminal R)
Door contacts (front and rear)
Bonnet contact
Boot lid contact
Tilt alarm sensor
Interior protection

Siren for the Antitheft Alarm System:
Quote:
The electronic control and the battery are integrated in the siren. The emergency current siren can therefore be activated independently of the vehicle power supply system.
The siren is primed and deactivated via a line STDWA (the same line also activates and deactivates the tilt sensor and interior protection facility). The siren is informed of the alarm triggering status by the general module via the SIREN line. When the siren is armed, an alarm may still be triggered if the siren is disconnected from the vehicle electrical system or the vehicle battery is disconnected.
If the alarm is triggered by tampering with the emergency current siren, the alarm is not stored in the alarm memory as the general module cannot register the alarm.
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Old 09-17-2011, 01:38 PM   #31
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first off, if a thief wants your car they will get it no matter what.

second, you do realize this is practically like all other aftermarket alarms..

If a thief wants your car, with a $10 alarm, you'll be helping them out!

Every other aftermarket alarm? How you figure? From this guys video i can see a lot a differences between what he has and what i have. maybe you should look into it before replying.
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Old 09-17-2011, 01:43 PM   #32
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If a thief wants your car, with a $10 alarm, you'll be helping them out!

Every other aftermarket alarm? How you figure? From this guys video i can see a lot a differences between what he has and what i have. maybe you should look into it before replying.
you remind me of the cheap wine experiment. thanks for playing.
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Old 09-17-2011, 01:57 PM   #33
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This is phenomenal. For most of us, we don't have the factory alarm pre installed and even though it would be nice, I don't see any of us running to the dealership to drop $500+ on an alarm we will hopefully never have to use. For me, the anti theft system in the car is enough assurance that my car will not be stolen, and I just try not to leave anything valuable in the car.

Like you said ac2007, this is worth it even just for the chirping on unlock and locking. The fact that it doubles as an alarm makes it 100x better.

So basically you can spend $10 on this, or spend another $500 for tilt and motion sensing features of the factory alarm... I think I'll just stick with this awesome idea, JUSTSAYIN...
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Old 09-17-2011, 07:49 PM   #34
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This is phenomenal. For most of us, we don't have the factory alarm pre installed and even though it would be nice, I don't see any of us running to the dealership to drop $500+ on an alarm we will hopefully never have to use. For me, the anti theft system in the car is enough assurance that my car will not be stolen, and I just try not to leave anything valuable in the car.

Like you said ac2007, this is worth it even just for the chirping on unlock and locking. The fact that it doubles as an alarm makes it 100x better.

So basically you can spend $10 on this, or spend another $500 for tilt and motion sensing features of the factory alarm... I think I'll just stick with this awesome idea, JUSTSAYIN...
Glad I could help.
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Old 09-18-2011, 11:56 AM   #35
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I didnt but the horn/siren yet. I tried to program it but it is not working. this is the error i am getting: "Anti-theft alarm system siren, radio interior protection, Tilt alarm sensor or wire DTDWA short circuit". can anybody explain me this? THANK YOU
EDIT: i do not have the stock radio.
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Old 09-18-2011, 12:16 PM   #36
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That's normal if you don't have the stock deck and activated the alarm. I also get multifunction steering wheel short-circuit since I installed the PAC SWI-jack.
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Old 09-18-2011, 03:31 PM   #37
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It is not working. Could it be that i havent installed the siren, thats why its not working? Thanks for the help
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Old 09-18-2011, 03:41 PM   #38
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I showed you the options list and what I've selected. Make sure DWA is selected. Do you have flashing indicators with lock/unlock?
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Old 09-18-2011, 07:45 PM   #39
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They were not working before but after 4 hours, it is working . Now I need to hook up a siren. I followed the option you told me. Thank You for all your help.
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Old 09-18-2011, 09:14 PM   #40
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np, post up your setup once its finished.
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