Question about Alarm & Keyless Entry System for Toyota Vehicles

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Alarm fault on Lexus RX300

Every time i lock my 2000 lexus RX300 by the remote the alarm goes off 15-20 seconds afterwards. I then have to unlock it and re lock it. or if i press the unlock button when i get out of the car the car will lock itself after 30 seconds but i am unsure if this alarm is then working. any ideas?

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  • joserqc May 01, 2009

    I have the exact same problem, if I lock it manually no problem, but if I use the remote the damn thing keeps beeping every 10 seconds

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Posted on Jul 12, 2009

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SOURCE: Car alarm goes off in the night only. How can I

1. make sure no one is trying to steal your car. 2. it should be a simple fuse that you can disconnect 3. if not, cut the wires to your horn (you wont be able to pass inspection if you do this)

Posted on Feb 09, 2010

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1 Answer

1994 lexus es 300 starting issue / alarm reset?


I think that's the alarm system as well.the most important thing is the alarm system is still working?step out yr car try to use remote key to lock n unlocked,if that's working.i don't worry at all.lock n unlock are alarm system reset itself.should be normal,battery is super low or dead .good luck for u

Jan 20, 2014 | Lexus ES 300 Cars & Trucks

2 Answers

I used csorb's instructions to reprogram a master key for my 2000 Lexus RX300. The ignition works perfectly, but the doors don't lock or unlock.


Hi!!
I believe your alarm is in the PASSIVE MODE, here is how it works.

PASSIVE MODE Setting (Arming) Anti-Theft System The system will automatically set 30 seconds after following methods are performed: Remove ignition key from ignition switch. Exit vehicle, and close all doors. After performing this, anti-theft indicator on left side of instrument panel will light continuously for about 30 seconds. After 30 seconds, anti-theft indicator will blink once per second. When system is set, doors cannot be locked or unlocked using door lock control switch.
CANCELING THE ALARM AND REPROGRAMING MAY SOLVE YOUR PROBLEM.
Canceling Anti-Theft System Setting (No Alarm) When system is set (armed), but alarm is not sounding, use one of following methods to cancel system setting:
  • Unlock left or right front door using key.
  • Unlock all doors using remote keyless entry system.
  • Insert key in ignition switch and turn to ON position (this is operative only when anti-theft system has not been triggered).
HERE IS HOW TO REPROGRAM THE ALARM IN CASE YOU NEED TO RESET IT.
PROGRAMMING
PASSIVE MODE NOTE:Initial mode is passive mode off. If there is a different signal in middle of programming, signal is invalid.
Programming Passive Mode Off
  • Remove ignition key from ignition key cylinder. Ensure all doors (including back door) and engine hood are closed and unlocked. Perform all of following methods within 30 seconds:
  • Lock or unlock any door with key or remote keyless entry system.
  • Open driver door.
  • Lock and unlock driver door lock knob 3 times.
  • After performing this, system should start force lock after 2 seconds. Perform all of following methods within 20 seconds:
  • Unlock driver door lock knob.
  • Close and open driver door 2 times.
  • Lock and unlock driver door lock knob.
  • After performing this, system should start force lock after 2 seconds. Passive mode should now be off.
Programming Passive Mode On
  • Remove ignition key from key cylinder. Ensure all doors, engine hood and luggage compartment door are closed and unlocked. Perform all of following methods within 30 seconds:
  • Lock or unlock any door with key or remote keyless entry system.
  • Open driver door.
  • Lock and unlock driver door lock knob 3 times.
  • After performing this, system should start force lock after 2 seconds. Perform all of following methods within 20 seconds:
  • Unlock driver door lock knob.
  • Close and open driver door 4 times.
  • Lock and unlock driver door lock knob.
  • After performing this, system should start force lock after 2 seconds. Passive mode should now be on.
If you need further assistance, please provide an email address to send more info on your security system
Good Luck!! A 4 THUMBS UP rating would be greatly appreciated for this solution. Thank you for using FixYa!!

Mar 01, 2011 | Lexus RX 300 Cars & Trucks

1 Answer

I HAVE A1992 LS400 LEXUS THE ALARM WAS GOING OFF AND THE CAR WOULDNT START,WHAT CAN I DO




if it has an alarm hook up the cables so the alarm goes off then deactivate it with the remote. if you dont have the remote then you need to take it to an alarm shop and get a remote programmed for it if they cant they will have to remove the alarm and you will need to get an aftermarket alarm for it but yea it wont start because the alarm was on. when you try to jump a car with an alarm even if you have the keys in the ignition the alarm will go off its a fail safe so noone can jump your car to hotwire it. but just do as i said jump it and disactivate the alarm with remote and it should turn over with ignition......
one thing you can try close all the doors lock the doors.....USE YOUR KEY TO LOCK THE DRIVERS SIDE DOOR AND THEN UNLOCK IT. See if this might reset it.....
Best of luck i hope this will help

Nov 30, 2010 | 1992 Lexus Es 300

1 Answer

I left spare key in my rx300 and locked it with the other when i came back to it it wouldent unlock by remote only by the key but the alarm goes wild


Try reversing the process with your other keys. You may just have a low battery in the key you unlocked with. Security settings on teh vehicle are programmable by the dealership. When my battery has failed under teh hood and we unlocked the car to boost, the horn went off the same way. Once the battery was replaced everything functioned fine. Your battery in the key may be failing to communicate with the car,or security was programmed that way from last owner, but try the procedure with and without spare keys locked inside

Jan 04, 2010 | Lexus RX 300 Cars & Trucks

1 Answer

Lexus rx300 started running without a key.. keys


Check your starter solenoid or your ignition switch, sounds like there is a short causing the car to start when the weather changes

Dec 31, 2009 | 1999 Lexus RX 300

2 Answers

2000 Lexus RX300 clock won't hold memory. We have a 2000 Lexus RX 300. We took it in for a check engine light and to change spark plugs and timing belt. When we got it back, the clock will not hold it's...


tony none of those repairs should have affected the clock in any way. sounds like an unlucky coincedence, but you should go back to the place where repairs were performed and ask them to check it for you. a health check should be performed to se if any fault codes are present.

Sep 27, 2009 | 2000 Lexus RX 300

1 Answer

REMOTE DOOR LOCK 1997 ES 300 LEXUS


Even if the remote is fairly new they can lose their programming you may have to have it re-programed

Mar 17, 2009 | 1997 Lexus ES 300

1 Answer

My problem is i just recently bought this 1990 Lexus LS400 and everything works fine but randomly the alarm will start going off when i open the truck or doors then i put the key in the ignition and it...


My 1991 Lexus LS 400 does something similar. When the alarm goes off I use the key to unlock the passenger side front door and it turns the alarm off. Go figure, I know it sounds funny but it solves the problem for me.

Jan 06, 2009 | Lexus LS 400 Cars & Trucks

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