Question about 2001 Lexus RX 300

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Why would the anti-theft alarm go off on my 2001 Lexus RX300? Started around 10:00pm tonight 4/6/15.

The remote key will only turn it off with the panic button. Remote key will not longer lock or unlock the doors. Could a dead battery in the remote opener cause the alarm to go off?

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Posted on Jan 02, 2017

  • 105 Answers

SOURCE: 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

Posted on Mar 17, 2009

FreeTech
  • 426 Answers

SOURCE: 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

Posted on Dec 31, 2009

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1 Answer

What is causing the anti-theft alarm light flashing/horn blowing go off?


the remote key would be the easiest (and cheapest) thing to try first but i don't think that a low battery in the fob would activate the alarm randomly , i'd get the OBD codes read as will point to which part of the anti theft/central locking system is causing the issue

Apr 07, 2015 | Lexus RX 300 Cars & Trucks

1 Answer

Why would the anti-theft alarm go off?


Factory alarms rarely false alert, maybe someone did tamper with the car and ran off before you saw him. The one thing that will often trip alarms is a bad battery in the car, have it tested. Your car may have an add-on alarm in which case anything goofy can happen. It's odd that you had to hit the panic button to shut the alarm off, but if it functions normally otherwise it's unlikely to need a new battery. Is it at all possible that you hit the panic button and that caused the alarm to sound? If it was in your purse or pocket maybe it got pressed in which case it might be normal for you to have to hit panic again to turn it off.

Apr 07, 2015 | Lexus Cars & Trucks

2 Answers

I have lost my lexus remote control key. how and where can i buy a new one through the net. thank you..


Hi,

Buy it from :-

http://cgi.ebay.com/ebaymotors/2001-2002-2003-LEXUS-RX-300-RX300-KEY-REMOTE-KEY-_W0QQcmdZViewItemQQitemZ120607853494QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I hope i have been helpful.

Thank You!!

Aug 21, 2010 | 2001 Lexus RX 300

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

1 Answer

I got locked INSIDE my 2001 Lexus LX470 today. I


This is the anti theft function working as it should. Your husband needed to override it with the key. The command told the car to lock down. Because the key was not in the car the anti theft set off the alarm and locked down the engine as well.
This is exactly what you would want the car to do if you left it locked on the street with your windows down while shopping. Otherwise someone could reach in the window, unlock the door, slide in and start hot wiring the car.
These lock functions are programmable and can be changed at the dealership.

Dec 06, 2009 | 2001 Lexus LX 470

1 Answer

Car


Your keys are prob. worn. My car did the same thing until i got very expensive new keys made.

May 14, 2009 | 1990 Lexus LS 400

1 Answer

Replaced the alternator, now anti theft won't disable


The ignition lock anti-theft switch (19A438) detects if the ignition key cylinder is broken or "slam pulled" during a theft. The ignition lock anti-theft switch is always monitored by the remote anti-theft personality (RAP) module. This allows the alarm system to be triggered in the case that the ignition lock anti-theft switch detects tampering of the ignition key cylinder (even in the event that the alarm is not active at the time).
Refer to the Section 501-14B for more details on the keyless entry remote transmitter (15K601).
The door open warning lamp switch (14018) communicates to the RAP module through the generic electronic module (GEM). This input to the RAP will cause the anti-theft alarm to be sounded if the anti-theft alarm was armed.
The door disarm switches are assembled into both LH and RH lock sets. The door disarm switch must be triggered before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating when it should have been disarmed.
The RAP module controls the anti-theft system and is the brains of the keyless entry system. The RAP module communicates with the GEM to request that the interior lights be turned ON/OFF with use of the keyless entry remote transmitter, and the GEM communicates to the RAP to inform when the door is opened. Refer to Section 418-00 for inter-module communication.
The RAP module has three wire connectors attached to it:
  • The antenna for the keyless entry remote transmitter.
  • 26 circuit connector (C256).
  • 22 circuit connector (C257).
In addition to the perimeter alarm that uses the door open warning lamp switch, the RAP module also uses the ignition lock anti-theft switch and the autolock/relock feature to prevent theft of the vehicle. For a full description of the autolock/relock system, refer to Section 501-14B .
The THEFT LED is found on the instrument panel between the tachometer scale and the needle pivot point. The LED is illuminated during prearming and flashes when armed or triggered.
Prearming and Arming the System
The system can be armed if:
  • The ignition is OFF.
  • The PANIC alarm is OFF.
  • All doors are closed.
There are two ways to prearm the system:
  • Press the LOCK button on the transmitter.
  • Open a door, press the power door lock button and close the door.
After 30 seconds the system will be armed and the theft indicator in the cluster will flash every two seconds.
Disarming an Untriggered System
An armed system will be disarmed with one of these valid actions:
  1. Pressing the UNLOCK button on the transmitter.
  1. Placing a key in the door and turning to UNLOCK.
  1. Turning the key to RUN or ACC.
The anti-theft alarm can be triggered by the following conditions:
  • The ignition cylinder is damaged with or without the RAP being armed.
  • A door is opened without disarming the armed RAP module.
The remote transmitter can activate a panic alarm which is similar to an anti-theft alarm, but does not deactivate the starter or cause the theft indicator to flash.
Disarming a Triggered System
If the system has been triggered, (the horn honks, the lights flash, and an external starter interrupt relay is engaged), the system can be disarmed by:
  1. Pressing the UNLOCK or PANIC button on the transmitter.
  1. Putting a key in the door and unlocking the door.
  1. Turning the ignition to RUN/ACC (Turning the key to RUN/ACC will not disarm an alarm that has been triggered by the ignition lock anti-theft switch.).

Apr 10, 2009 | 1997 Ford F150 Regular Cab

1 Answer

VEHICLE WONT START


Section 13-11: Anti-Theft System, Active 1998 Windstar Workshop Manual DESCRIPTION AND OPERATION Anti-Theft Alarm System NOTE: The system immediately monitors the ignition key lock cylinder upon removal of the key from the ignition. It is not necessary to arm the system for ignition key lock monitoring.

The anti-theft alarm system:
  • protects the vehicle from unauthorized entry into the passenger compartment, engine compartment and cargo area.
  • monitors the status of the ignition key lock cylinder.
  • is controlled by a remote anti-theft personality (RAP) module. The remote anti-theft personality module also controls the electronic door lock functions. Refer to Section 01-14B for more details.
  • when armed, detects unauthorized entry into the passenger compartment by using an input from the GEM module regarding the state of the door or liftgate (open or closed).
  • protects the engine compartment with a hood switch which is located on the LH cowl vent panel and is part of windshield wiper motor wiring (17A477) .
  • triggers an alarm if the ignition lock cylinder is forcibly removed from the steering column.
Once triggered, the system responds by:
  • flashing the low beam headlamps, the parklamps, rear lamps and the alarm indicator warning light emitting diode (LED).
  • sounding the horn (13832).
  • disabling the starter circuit until the system is disarmed.
---------------------------------------------------------------------------------------------
Remote Anti-Theft Personality Module
  • The remote anti-theft personality module is located behind the instrument panel (04320).
  • It contains a radio receiver that receives the RF signal from the keyless entry remote transmitter (15K601) through the alarm and lock system antenna (15603) and sends the appropriate command to the power door locks, the horn relay, or the generic electronic module.
  • The remote anti-theft personality module is equipped with an internal backup power supply which holds the programmed code in memory in the event the vehicle battery is disconnected.
-------------------------------------------------------------------------------
Remote Anti-Theft Personality Module Removal
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Remove radio. Refer to Section 15-01 .
  1. Remove lower instrument panel center finish panel. Refer to Section 01-12 .
  1. Lower glove box.
  1. Remove two remote anti-theft personality module bracket retaining screws.
  1. Disconnect electrical connectors and alarm and lock system antenna (15603).
  1. Remove remote anti-theft personality module and bracket.
  1. Remove remote anti-theft personality module from mounting bracket.
Installation
  1. To install, follow removal procedure in reverse order.
  1. Tighten remote anti-theft personality module bracket retaining screws to 6-8 Nm (54-70 lb-in).

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Components The system is composed of the following components:
  • remote anti-theft personality (RAP) module with integral antenna
  • alarm indicator LED
  • door lock cylinder switch RH, door lock cylinder switch LH
  • liftgate door lock cylinder switch (220A40)
  • hood switch (part of windshield wiper motor wiring (17A477))
  • ignition lock anti-theft switch (19A438)
The following vehicle components are also used by the anti-theft alarm system:
  • generic electronic module
  • power door lock switch (14028)
  • door open warning lamp switch (14018)
  • autolamp relay (14N089)
  • horn relay and bracket (13853) and horn (13832)
  • low beam headlamps
  • rear lamps (13404) and parking lamps (13200)
  • starter relay
  • door lock relays
  • keyless entry remote transmitter (15K601)
--------------------------------
Disarming an Untriggered System NOTE: A perimeter alarm will "shut off" after 165 seconds, but the system is still triggered and is not disarmed.

An armed but untriggered perimeter anti-theft system can be disarmed by one of the following four events:
  1. Unlock the doors by pressing the keyless entry remote transmitter (15K601) UNLOCK button once.
  2. Unlock any door with a key.
  3. Turn ignition switch to RUN or ACC.
  4. The remote entry PANIC button will disarm the anti-theft system only when the perimeter alarm is triggered and sounding.
------------------------------------------------
System Triggering NOTE: Although the remote entry PANIC alarm is not associated with the monitoring of the vehicle, the user will frequently say that the theft system was triggered when actually the keyless entry remote transmitter PANIC button was inadvertently pressed. A panic alarm will not flash the THEFT indicator.

The alarm can be triggered by the following events if the system has been armed and has not been disarmed first:
  • Open any door or liftgate.
  • Open the hood (16612) (if the hood was open when the system was armed, it must be closed before it can trigger the alarm).
  • Dislodge the ignition key lock cylinder.
  • The anti-theft system may be triggered inadvertently when the module is disconnected and then reconnected. To avoid inadvertent alarm triggering, disconnect the smaller 22-way connector first.
When the system is triggered the perimeter alarm will operate as follows: The remote anti-theft personality module will pulse the following outputs at approximately 1.3 Hz, 50 percent duty cycle for two minutes 45 seconds for North America. NOTE: Other perimeter alarms can be programmed for the system.

  • low beam headlamps
  • parking lamps
  • horn
  • THEFT indicator
The perimeter alarm can be retriggered, after a perimeter alarm has sounded for 165 seconds. After a perimeter alarm has timed out, if any trigger input is first seen as normal and is then seen in its trigger state, the perimeter alarm will be retriggered. The perimeter alarm can be triggered a total of three times between an arming sequence and a disarm event. An active panic alarm will be deactivated when a perimeter alarm is triggered (a perimeter alarm overrides a panic alarm).

Mar 02, 2009 | 1998 Ford Windstar

2 Answers

Trying to program remote key for 01 lexus rx300


Hi Are these instructions applicable to a 2006 RX300? I would be grateful for any help. Many thanks, Ben

Jan 25, 2009 | 2001 Lexus RX 300

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