grantshaw2

Hello
I am new to the IS world. Just bought a 2001 is300 2 days ago. 123 000 kms

The car was starting and working fine the first day. Parked it over night and went to start it in the morning. It would not start. Car had plenty of power and everything worked but it would not catch and start. At first I thought it may have been because I washed the motor the day I had bought it. So i popped the hood and looked around for moisture and water. Everything appeared dry.

I read through the manual and discovered that the security light should go out when the key was inserted into the ignition. My never did this and it continued to blink. So i was assuming that it was not reading the chip in the key.(master key) I shut the hood and locked the car. Walked away for about 30 seconds and tried it again. The light was now out and the car started perfectly. The car worked just fine all day.

The next morning I went to the car and it had the same problem. Security light would not stop flashing with the key inserted. I tried locking it and walking away to see if that would work again. It didn't. (tried this several times)

I then thought I would have the hood open for a bit as that is what I had done the previous morning. After about 5 minutes I closed the hood, locked the car, walked away for about 30 seconds and returned to the car. Inserted the key, security is now off and the car started just fine again. And the car has been starting just fine all day while running errands.

Does anyone know what may be the problem?
Anything I should look for?
I am scared that this is going to happen tomorrow morning again.

Please please help me!
Thanks
Grant

flavs23

sounds like you got a bad key or imobilizer ecu. do you have a spare master key? if so try it with the 2nd key and if it all works fine then it would lead me to think that there is something wrong with the frist key. if they both fail to work then maybe something like an imobilizer ecu or body ecu. best of luck!!!

grantshaw2

So for the third day in a row the car would not start. Inserted the master key and the valet key(these are the only 2 keys I have), the security light would continue to flash.
I opened the hood for about 30 seconds, closed it, locked the car and walked away for about 30 seconds.
inserted the master key, security light was no longer flashing and the car started. wow

Can someone please please help me!!

Thanks

Grant

Justin727

must have accidentally tripped the security system

the.wong.k

iTrader: (2)

there is definitely something wrong with the security and immobilizer, something like this can only be fixed through a lexus dealer unless you have the techstream

grantshaw2

4th day owning the car.
Went to start it this morning and it worked just fine.No blinking when inserting the key and started right up