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Posted on May 17, 2010
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1990 lexus ls 400 security system went off now vehicle will not start. Keys open door turn alarm off but starter will not engage. What can I do?

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  • Posted on May 17, 2010
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Your alarm is keep your system from starting. When the alarm system fails, you have 1 of two choices, if it is a after market alarm then just disconnect the alarm, if it is a manufacture alarm then you will need to take it to a company to have then replace the alarm or disconnect it. Doing so yourself you can hurt your vehicle more then help it

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Related Questions:

0helpful
1answer

My door lock is broken on lexus ls 400 and now i can get the alarm to turn off
for right now you must disconnect the positive from the battery. After you must call to the locksmith for a new key. see the diagram attached.
6_21_2012_4_31_57_pm.gif6_21_2012_4_32_59_pm.jpg
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Jun 21, 2012 • 1990 Lexus LS 400
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1answer

My lexus battery went flat removed charged up put back on alarm went off, turned on ignition alarm stopped. went to start car engine turns over wont start been told imobaliser is on, how do i turn of...
Call the Dealer you purchased the car from, and have them walk you through it. Act as if you are stuck in the middle of nowhere.
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Mar 09, 2011 • 1991 Lexus LS 400
0helpful
1answer

Starter wont engage what can i do is bypassing security system possible
its possible with a remote start system
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Jun 09, 2010 • 1990 Lexus LS 400
3helpful
1answer

Car alarm went off while unlocking the door, now
you need to reset alarm/immobiliser.lock car with remote, hold button down for 30 secs,then press/hold down unlock button,should reset.another way is with key in ignition/turned on, press alarm button down and hold for 30 secs.this resets immobiliser.toyota
systems vary..depending on market.
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Mar 30, 2010 • 1991 Lexus LS 400
0helpful
1answer

1990 lexus ls 400 security system went off now vehicle will not start. keys open door, turn alarm off but starter will not engage. had problem 2 months ago changed car battery. vehicle started, but the...
Okay you may want to check to see if the sensor on door lock cylinder hasn't fallen off from the lock itself. Pull of the door panels and check the wires at the door lock cylinder. Hope this helps.
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Mar 25, 2010 • 1990 Lexus LS 400
1helpful
1answer

I have a 1990 Lexus LS 400 and I was told the alternator is the problem....The lights, radio, and tail-lights do not work (Nothing electrical even with a new battery). Could this be the only problem??...
I would inspect your wires at the starter. If you live up north then corrosion is bad, clean all wires going to starter. then clean wires to back of alternator. I seriously doubt that alternator is the problem, but if you remove it you can have it tested for free at most parts stores.
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Feb 13, 2010 • 1990 Lexus LS 400
2helpful
1answer

For my 1998 lexus ls 400. i attempted to jump
make sure all doors, hood and trunk are completely closed. put the key in the driver door lock and lock and onlock the door three times.
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Oct 21, 2009 • 1996 Lexus GS 300
0helpful
1answer

My alarm went off when I popped the hood with the keys in the ignition of my 93 Lexus ES 300, now the car doesn't start. Do I need to reset something?
put the key in the drivers door lock and lock and unlock it three times. make sure all door, hood and trunk are completely closed before doing this.
do you have a key fob?
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Oct 20, 2009 • 1991 Lexus LS 400
0helpful
1answer

Car
Your keys are prob. worn. My car did the same thing until i got very expensive new keys made.
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May 14, 2009 • 1990 Lexus LS 400
0helpful
1answer

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.
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Jan 06, 2009 • Lexus LS 400 Cars & Trucks
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My door lock is broken on lexus ls 400 and now i can get the alarm to turn off

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