r/s not disarming oem alarm
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=133028
Printed Date: April 27, 2024 at 7:39 AM
Topic: r/s not disarming oem alarm
Posted By: unterstrom
Subject: r/s not disarming oem alarm
Date Posted: December 19, 2012 at 5:57 PM
Hello everybody, I have a question about oem alarm disarm. Anytime I lock and arm the oem alarm on my 08 altima and then use the R/S transmitter to disarm/unlock the alarm goes off right after the doors unlock.
If I press unlock twice on the transmitter the alarm keeps quiet.
The same applies to popping the trunk.
Does that mean a double pulse is required to disarm and unlock?
What's funny is if I lock the car with the transmitter, one unlock is enough and the alarm doesn't go off.
I have it set for the oem alarm to be controlled by R/S (autostart as-2381fm, connected to BCM) and not by data (through ads bypass).
Any input is greatly appreciated.
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"Good judgment comes from experience. Experience comes from poor judgment."
-unknown
Replies:
Posted By: afridihamid
Date Posted: December 19, 2012 at 6:13 PM
The disarm wire on this car will require a (-) double pulse. If your R/S does not have that function, you may have to use relays.
Posted By: Mike M2
Date Posted: December 19, 2012 at 9:11 PM
The first pulse disarms, the second unlocks on this car. Doesn't explain what your problem is but that is how it is supposed to work...
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Mike M2
Tech Manager
CS Dealer Services
Posted By: unterstrom
Date Posted: December 20, 2012 at 7:08 AM
Thanks for the replies guys. Apologies if I wasn't clear enough in the first post. If the car is locked and subsequently armed using the factory key and then using the R/S remote to unlock it is where te problem arises. If I press unlock once all doors open and right after that the alarm starts blasting. But if I press unlock twice (fairly quick) all doors unlock and the alarm stays quiet. The same problem exists when opening the trunk.
Regarding the relays could someone maybe explain what kind of relay I need or direct me to a post that would explain that.
I searched a bit in the relay section but didn't find any definetve answers.
Thanks again ------------- "Good judgment comes from experience. Experience comes from poor judgment."
-unknown
Posted By: unterstrom
Date Posted: December 20, 2012 at 7:19 AM
Oh, forgot to mention, in the programmming options for the AutoStart unit there is an option under lock and unlock. It's a 7/10sec pulse for lock and two 1/4sec pulses for unlock. Itried using that setting without success and tech at directed told me it's for something else!?
Figured I would throw this in. ------------- "Good judgment comes from experience. Experience comes from poor judgment."
-unknown
Posted By: afridihamid
Date Posted: December 20, 2012 at 7:06 PM
The 1/4 sec double pulse you mention of your R/S is only to the unlock wire. You could diode isolate the unlock wire and connect it to the vehicle's disarm wire & set the R/S unit to double pulse unlock.
Posted By: unterstrom
Date Posted: December 20, 2012 at 9:47 PM
afridihamid, do you mean splicing the unlock wire into two and connect one of the wires to the car's disarm?
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"Good judgment comes from experience. Experience comes from poor judgment."
-unknown
Posted By: afridihamid
Date Posted: December 20, 2012 at 11:53 PM
Yes, this will give a double pulse to the unlock and disarm wire simultaneously.
See the picture below for reference.
For your application, the white stripes of the diodes will be towards the R/S unit.
You can simply cut the disarm wire close to the R/S unit and connect it to the isolated unlock wire.
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