I have a 2007 Toyota Corolla type S. My problem is that when I press the unlock button on my remote the doors unlock and the lights flash however when you open the door the alarm sounds. It has been happening more frequently and recently after the alarm shuts down the car will not start......any ideas

go to any Toyota dealer. They will sell you a new key fob but they also charge extra for programming. Total cost for the key fob and programming will be around $100. any Toyota dealer can do it for you

if this is a factory lock security system you can contact dealer for instruction sheet to re-program your remote or have them do that for you if vehicle is under warranty. if not you can go online and find the procedure for your make,model and year of vehicle. sounds like the remote's battery is need of replacing or the remote needs to be re-programmed

Replace the battery. The light just means there is enough charge to light the LED.

have a chat with the dealer about this,I am not up to speed on these electronic theft systems..my fotay is the older cars and such..

are you sure the battery in remote is not bad?? first thing to check

put new batterys in the remote

There are many types of aftermarket modules, some doing a simple lock/unlock, others also activating horns, lights, alarms, etc.
So I'd suggest searching for "how to wire car locking module," then checking out the results (including many YouTube videos).
However, you'll probably install the unit inside the driver's door panel, because that door's exterior lock and interior lock button give orders to the locks in the other three doors.
Then, use a circuit tester to identify:
--one wire that is always hot, whether the engine is on or off. This will usually be colored. This wire should be connected (use a crimp-on connector) to the power supply for your aftermarket locking module.
--a black (usually) ground wire, that should be connected to the ground wire on the module.
--one or more trigger wires running from the lock switch on the door. There are different types of trigger setups and different ways to connect them, so there may be some trial and error involved. When you've got everything hooked up, though, make sure the "lock" button on your remote makes the doors lock (and vice versa for the unlock button). If the commands are reversed, simply swap the control connections.
--if your new module also has the capability of making your horn sound and your headlights and taillights flash ... well have fun. You'll have to figure out how to hook up the wiring on the module to the headlight and taillight circuits, which won't be obvious or easy. Personally, I'd skip that part and be happy with the remote lock/unlock.

IMPREZA: 2005, 2006, 2007 and
FORESTER: 2005, 2006, 2007, 2008
Check for Immobilizer key on Forester XT models only.
information is always subject to change and correction
new remote for 2005 Imprezas.
This is not the same remote as the 05 Legacy/Outback remote which also has truck/gate release on the front and a red panic button on the back.
Lock: press Lock button for 2 seconds or so to lock car, and arm optional security system. The car with chirp once and turn signals flash for locked, 5 short chirps and signal flashes if any door is not fully closed. The dome light goes on for 15 seconds and ignition key ring (if present) will light for 30 seconds when unlocked.
Unlock: press unlock one time for driver's door, press again within 5 seconds to unlock all doors inkling rear gate (wagon). The system does not open the trunk.
Panic mode: press and hold lock button for approx. 3-4 seconds to activate Panic mode. I panic model the horn honks and turn signals flash until either the lock or unlock button is pushed again.
Finder mode: Press lock button 3 times within 5 seconds to activate Vehicle Finder mode. The horn will honk once and the turn signals will flash 3 times
Distance: works within approx. 30 feet depending on battery strength, nearby concrete walls and etc.
Audible Chirp On-Off: the system will chirp when locked or unlocked. To turn OFF the chirps, unlock the door and then push both lock and unlock buttons at the exact same time for 2+ seconds. There will be 2 chirps indicating the the audible is off. To turn the chirp back on, repeat the process and the system will chirp one time when it is back on.
Battery: as the battery ages it will only work as you get closer to the car. When a battery is replaced, the transmitter must be re-synchronized with the Keyless control unit. To synchronize, press the lock or unlock button 6 times.
Programming: 4 codes may be programmed.
Sit in driver's seat and unlock all doors. Open and close the driver's door
Turn the ignition key from LOCK to ON position 10 times within 15 seconds. Be sure to stop at both lock and on. The horn will HONK once to indicate transmitter programming mode is activated. Leave key in LOCK position and don't remove it from ignition.
You now have 45 seconds to complete the programming as below.
Open and close driver's door again.
Push either lock or unlock button on the remote you want to program. The horn will honk 2 times when successful.
To continue and program other remotes at the same time: open and close the driver's door and push lock or unlock on the remote. The driver's door must be opened and closed between each remote you want to program.
Done programming? remove the key from the ignition and the horn will honk 3 times.
DELETE old codes? Reprogram 4 times, it will overwrite old codes.
Alarm Security System: optional on all models. When locked there is one chirp (can be turned off, see above), the turn signals will flash and the red 'security' light will start to flash once every 2 seconds except for STi which flashes twice every 2 seconds.
There will be 5 chirps if a door, hood, and trunk or gate is not fully closed
You can also arm the system by using the power lock button on the driver or passenger door as you get out of the car and then closing the door behind you.
Disarm the system: push unlock for 2 seconds
Lost remote, alarm activated? When you can't use a remote to turn off the system: open the door with a key or try to start the car and the horn will start to honk. Turn the key on-off 3 times within 5 seconds and the alarm will go off and you can start the car. It's simple!
VALET mode: To set valet mode or just to disable the security alarm system: 1. unlock all doors 2. physically open the driver's door 3. hold the UNLOCK button on remote for 2+ seconds. The red 'security' light will then flash 2 times a second until the car is turned on.
System has been Tripped (except for STi): if you unlock the door with the remote and it chirps the signal light flash 4 times, the system has been triggered;
Identification mode: To find out what happened and why the system was triggered:
Open and drivers door, leave it open. Turn ignition key from LOCK to ON 2 times and then leave in LOCK position.
Tripped code: 1 security light flash: a door has been opened, 3 flashes when the impact sensor was triggered, 4 flashes when the ignition was messed with or battery disconnected

Open the remotes up...Are the boards the same...?

the actuator might have been disconnected from the lock, its attached inside the door, with a metal rod that clips into the actuator, check it out, might be a easy fix, good luck and god bless, please rate me!