Had this issue with a 2007 Toyota Camry. In the hood latch assembly under the bonnet there is a micro switch that tells the alarm the bonnet is shut so the alarm can be armed. it's designed to protect the engine bay when the car is locked. The switch is "closed" when the bonnet is shut but as the switch gets old the resistance varies randomly enough to give a false reading that triggers the alarm. To get access to the micro switch you need to pull the whole front bumper off. I chose to remove the spring on the hood latch so I could access the wires on the bottom of the switch. I cut both wires and soldered them together and heat shinked them so the computer thinks the bonnet is always closed. Problem solved.
Hi MUSTIE1, Many thanks for the video. I have exactly the same problem on my Toyota SW4 2008 (= Fortuner or 4Runner in the U.S.) in Brazil. i.e. the alarm sounds after some time for no apparent reason. I thought I had solved this with a certain sequence of presses of the buttons on the key, but after the car sitting quietly for 4 days, the alarm suddenly went off AGAIN !!! I've WD40ed the doors and bonnet alarm switches, but to no avail. I thought of disactivating the alarm completely by removing its fuse, but the same fuse applies to a lot of other stuff. The manual has a whole page explaining how, by quickly inserting and removing the key in the ignition 2 times and then pressing both the door lock and unlock buttons on the key for 5 seconds, it's supposed to turn of the alarm sound, but keep the indicator flashes. I've just done it, so let's see. I'll only relax after a week of silence. If it happens again, I'm thinking of cutting the wires to the 2 alarm horns, but I'm scared this could upset the whole car system, and perhaps prevent the car from starting.
i have a 99 4runner limited that when I use remote to lock doors in COLD WEATER,when I go to unlock doors,the security system has disabled everything,lights switches for doors ect like the battery is dead,even putting keys in door,and ignition does not work,as soon as I pop the hood,it resets,and I'm able to start and be on my way,its making me nuts ANYONE KNOW WHATS GOING ON,and when I do pop the hood the truck returns to normal activating the alarm,then I can use key to stop it,and then Start engine,and be on my Way,only after sitting in cold weater overnight,and NEW BATTERY,and new battery in remote Fob HELP,im new to a 4runner, I have a brand new camry,but love the 99 runner better HELP,i don't want to be stranded somewhere because of ALARM
Mustie try lubing the tail gat latch, WD-30 worked for the guy in the video I just watched , open and close the tail gat about 10 times to get the lube in good, then see if that solves the problem, good luck
Did yours ever just beep under the hood and doors locking and unlocking (or trying to) on their own? Then the BIG horn with lights would go off. We have to unhook the battery every time. Thought it was very cold weather causing it, but it just happened and its 50 degrees. Gonna liquid wrench all latches first. One time my husband actually got in it and went up the street so it wouldn’t bother the neighbors and it was going off the whole time he drove it around!
I figured it out sorry I’m so late
Had this issue with a 2007 Toyota Camry. In the hood latch assembly under the bonnet there is a micro switch that tells the alarm the bonnet is shut so the alarm can be armed. it's designed to protect the engine bay when the car is locked. The switch is "closed" when the bonnet is shut but as the switch gets old the resistance varies randomly enough to give a false reading that triggers the alarm. To get access to the micro switch you need to pull the whole front bumper off. I chose to remove the spring on the hood latch so I could access the wires on the bottom of the switch. I cut both wires and soldered them together and heat shinked them so the computer thinks the bonnet is always closed. Problem solved.
I just got this issue with my camry 2009. Alarm goes off after 10-15 mins of parking, any suggestion/solution please?
Any luck I know that’s really old put above that hatch where the harness comes through is where wires are known to get cut
the RS3200+ is bad. the modual would need to be replaced and or bypassed.
Hi MUSTIE1, Many thanks for the video. I have exactly the same problem on my Toyota SW4 2008 (= Fortuner or 4Runner in the U.S.) in Brazil. i.e. the alarm sounds after some time for no apparent reason. I thought I had solved this with a certain sequence of presses of the buttons on the key, but after the car sitting quietly for 4 days, the alarm suddenly went off AGAIN !!! I've WD40ed the doors and bonnet alarm switches, but to no avail. I thought of disactivating the alarm completely by removing its fuse, but the same fuse applies to a lot of other stuff. The manual has a whole page explaining how, by quickly inserting and removing the key in the ignition 2 times and then pressing both the door lock and unlock buttons on the key for 5 seconds, it's supposed to turn of the alarm sound, but keep the indicator flashes. I've just done it, so let's see. I'll only relax after a week of silence. If it happens again, I'm thinking of cutting the wires to the 2 alarm horns, but I'm scared this could upset the whole car system, and perhaps prevent the car from starting.
That's crazy information. Who would have thought the hood switch is getting gummed up?
If u need help from me, just reply
Siren, it has a 12v reserve battery (mini) fitted inside. It is low on cell, so the alarm keep going off.
i have a 99 4runner limited that when I use remote to lock doors in COLD WEATER,when I go to unlock doors,the security system has disabled everything,lights switches for doors ect like the battery is dead,even putting keys in door,and ignition does not work,as soon as I pop the hood,it resets,and I'm able to start and be on my way,its making me nuts ANYONE KNOW WHATS GOING ON,and when I do pop the hood the truck returns to normal activating the alarm,then I can use key to stop it,and then Start engine,and be on my Way,only after sitting in cold weater overnight,and NEW BATTERY,and new battery in remote Fob HELP,im new to a 4runner, I have a brand new camry,but love the 99 runner better HELP,i don't want to be stranded somewhere because of ALARM
Mustie try lubing the tail gat latch, WD-30 worked for the guy in the video I just watched , open and close the tail gat about 10 times to get the lube in good, then see if that solves the problem, good luck
Did yours ever just beep under the hood and doors locking and unlocking (or trying to) on their own? Then the BIG horn with lights would go off. We have to unhook the battery every time. Thought it was very cold weather causing it, but it just happened and its 50 degrees. Gonna liquid wrench all latches first. One time my husband actually got in it and went up the street so it wouldn’t bother the neighbors and it was going off the whole time he drove it around!