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.
Have you got a sensor pin on the hood ? near the center. There are doors but a hood too : ) i've found bent brackets on the net causing erratic problems. vibrations could cause that. if it was wiring problem you would have a constant problem.
My alarm started triggering on remote unlock or manual unlock of doors. I thought it was the panic button at first but after noticing the behavior on my wife's remote I looked for a way to prevent the arming of the alarm when locking the doors. I found by removing the trunk switch and grounding the switch lead the system thinks the trunk is open, won't arm the alarm but the remote still locks the car. You will also have to remove the trunk light so that battery does not drain. This may also work if you remove and ground the hood switch. Good luck!
Check the sensor for the hood or hood light could have moved if its adjustable, from opening and slamming it shut over the years or if its on a flimsy bracket maybe it bent. I have seen this on other cars.
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.
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!
There should be a valet switch near the hood release. See if you can turn it off. Also Google "How to reset an alarm on the 2000 Toyota 4Runner" and find the ehow article. Maybe that procedure will help.
In order to deactivate first check the manual there is usually a switch to shut it off under the steering wheel somewhere you need to find and then 2 your car on hit the switch for 5 seconds turn your car off and it should be deactivated.
there might be a factory shock sensor on the steering column somewere......the brain on some factory alarms is under the hood usually not marked so you just gotta look for a small box thats out of place....i've also seen them behind the radio or even behind the glove box
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.
Glad you got it sorted, that stuff can be a real pain in the arse....thanks for the video.
thanks for the info, it ended up being the hood switch was gummed up and would slowly move every time l opened the hood,
Have you got a sensor pin on the hood ?
near the center.
There are doors but a hood too : )
i've found bent brackets on the net causing erratic problems.
vibrations could cause that.
if it was wiring problem you would have a constant problem.
this model year nothings under the seat, just the rearhatch, but thanks for looking
My alarm started triggering on remote unlock or manual unlock of doors. I thought it was the panic button at first but after noticing the behavior on my wife's remote I looked for a way to prevent the arming of the alarm when locking the doors. I found by removing the trunk switch and grounding the switch lead the system thinks the trunk is open, won't arm the alarm but the remote still locks the car. You will also have to remove the trunk light so that battery does not drain. This may also work if you remove and ground the hood switch. Good luck!
thinkin hood latch too, theres nothing under the seat on a 2000, thanks for responding
Check the sensor for the hood or hood light could have moved if its adjustable, from opening and slamming it shut over the years or if its on a flimsy bracket maybe it bent. I have seen this on other cars.
its got a after market, like your thinkin, mount one of those boat selector switch on the grill,
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.
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!
There should be a valet switch near the hood release. See if you can turn it off. Also Google "How to reset an alarm on the 2000 Toyota 4Runner" and find the ehow article. Maybe that procedure will help.
Siren, it has a 12v reserve battery (mini) fitted inside. It is low on cell, so the alarm keep going off.
In order to deactivate first check the manual there is usually a switch to shut it off under the steering wheel somewhere you need to find and then 2 your car on hit the switch for 5 seconds turn your car off and it should be deactivated.
That's crazy information. Who would have thought the hood switch is getting gummed up?
I just got this issue with my camry 2009. Alarm goes off after 10-15 mins of parking, any suggestion/solution please?
windshield might leak ?does it happen when it rains?
there might be a factory shock sensor on the steering column somewere......the brain on some factory alarms is under the hood usually not marked so you just gotta look for a small box thats out of place....i've also seen them behind the radio or even behind the glove box
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
thanks for the info,,