The alarm is automatically set with me not even controlling it.

If you have 2 remotes does it do the same thing with both of them?
I/We have a Honda FRV and if you set the alarm from outside the car ....which locks the doors ...and the doors are opened from the inside, (yes I have set the alarm whilst still in the car,) this unlocks the doors as the drivers door has the master central locking switch on it. If I close the door withing a few seconds the alarm reactivates itself and the doors relock automatically
Presumably when your doors unlock the alarm is disarmed? Maybe your issue is linked to the receiver in the security system?

There is a difference, presumably, between you locking the doors from the dash as opposed to doing it from the remote control, the security system is not armed in the former, only the doors are locked +



GOOD LUCK

first is fuses are they good.?
the locks on cars are solenoids.
im guessing all ways to open it fail,
keys, key fobs, and internal controls panels?
no childern locks set (some are hidden on cars)
no drivers, panel , master lock, he pushes it and all locks freeze?
this is a general statement.
so you use a thing like a volt meter. $10 at walfart.
we check for 12vdc across the 2 solenoids.
12vdc when active is good.
0v is bad,
if you get 12v then the solenoid is bad or jammed.
if you get 0v, the controls are bad.
its that simple. and electro magnetic solenoid, is easy to test.
with any voltmeter made.
if the controls are bad we use the same method to check them.
12vdc to the switch it must be.
then you push the rear switch and 12vdc leaves this switch.
if not the switch is bad.(input good)

1st im sure the alarm stopped working because the power locks dont work (feedback issue) next on some models water from rain or car washes gets down inisde doors and shorts out electric devices in door , with that many things out im sure your gonna find a fuse blown in your panel , but i'll further bet that new fuse will go again next rain as well .

does the dome light come on when the drivers door is opened, if not the pin switch is bad

if you use the keyless entry to unlock the vehicle & don't open a door within 30 secs.the vehicle will automatically lock & the alarm will reset,if you unlock it with the key this shouldn't happen.....cheers.

im not positive..but...i know for my old car...if i locked doors as i was getting out with power switch..it set the factory alarm.
if u dont want to set the alarm..close the locks manually.

Im no professional but i did recently buy a 93 maxima and i have the same security alarm problem and my powered locks dont work at all. im taking off the door panel today to take a look and see if the alarm sensor is loose or damaged, if it is, ill probably just disconnect it. one thing i have noticed though is that when i hit the lock or unlock button, i hear a faint click from the dashboard area which im assuming is the solenoid on a transistor which would mean that the buttons work but the transistor isnt delivering power. Semi-Solution for Locks: Listen for very quiet click when you lock/unlock doors, if you hear it, uve got major work to do, if you dont, then take apart the door and check the switch connections. Semi-Solution for Alarm: take off the door panel and disconnect the sensor.

Just a possibility, but a discharged battery could be the culprit. Do the headlights come on brightly? Will the horn blow normally? A 'dead' battery will usually have enough power to illuminate LED warning lights, while not having enough current to operate the starter/door solenoids, etc. Have somebody test the battery voltage to be sure.

For the system to arm, the ignition switch must be off and the key removed. Then, the multiplex control unit must receive signals that the doors, hood, and trunk lid are closed and locked. When everything is closed and locked, none of the control unit inputs are grounded.

The door switches, hood switch, trunk lid switch, door lock knob switches, and door lock cylinder switches are all open. Ten seconds after the doors are locked with the key or the lock knob, or immediately after locking the doors with the remote transmitter, the system arms.

If anything is opened or improperly unlocked after the system is armed, the control unit gets a ground signal from that switch, and the system is set off.

If one of the switches is misadjusted or there is a short in the system, the system will not arm. As long as the control unit continues to get a ground signal, it thinks the vehicle is not closed and locked and will not arm.

An alarm that sounds for no apparent reason may have been set off by a switch that is on the threshold of misadjustment. In this case, it may only take a significant change in outside temperature, the vibration of a passing truck, or someone bumping into the vehicle to make the alarm sound.