Question about Lexus LS 400
I bought a used 93 Lexus ls400 and it works fine except the anti-theft alarm went off (still not sure why) and now the car won't start. To complicate the issue is the passenger door cannot be unlocked from outside (it's stuck, don't know why) and the driver lock is pushed in and very loose. I can unlock the door but it won't stop the alarm. What can I do other than take it to a mechanic? The car runs fine otherwise (when it can be started.) Please help! If anything, how do I access the lock on the driver door so I can push it back out and not leave it so loose? Thank you for any suggestions. I appreciate your time.
Depending what part of the country this car was purchased originally, the alarm system can be different. These are after market systems installed by the distributor or dealership. Different systems are connected differently. Either way the alarm system is connected to the engine controller and or the main electrical circuit. This has to be removed and the circuit reconnected. I would advise taking to a car alarm specialist and have them replace or remove it.
Posted on Feb 12, 2014
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Posted on Jan 02, 2017
jimmy: it sounds like the drivers door unlock tamper switch or the other switch may have failed. One side can affect the other under certain circumstances. Your trunk lock also has a switch which arms and disarms the antitheft system. Try locking all the doors, make sure the hood and trunk lid are closed and then open the trunk. Leave it open open the drivers door and try to start the car.
If it's a no start. Disconnect the ground battery cable then put the ignition key in the run position in you ignition switch. Reconnect the battery and try to start the car. It should start. This usually will override the anti theft system. One issue with this will be, whether the antitheft system will remain disarmed.
Although I have never tried this before, I know that the system will not arm unless all the doors, trunk and the hood are closed.
I could suggest this to try if the car starts as I had told you pertaining to disconnecting the battery cable, I would take the switch and unbolt it from the passenger's side of the engine compartment just forward of the shock tower. Just let it sit somewhere so it doesn't get caught up in anything moving. If there is a light under the hood of your car, remove the bulb.
Let me know how you make out.
Posted on May 03, 2009
Try re-setting the computer...Disconnect the negative terminal of the battery and leave off for 5-10 minutes. This will allow the computer to reset. The charger may have interupted the signal or something.
Posted on Mar 11, 2010
SOURCE: 1996 Nissan Maxima - unlock
If the antitheft system is armed and isn't recognizing the key for starting, the dealer should be the next place it should be towed for reprogramming the key to the computer.
Posted on Oct 12, 2010
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