Tolyk

Hi!
Lexus Es300 (2000) Starts and stalls after replacing the battery. Most likely it is an immobilizer/ Help please who faced similar. Thank you!

LeX2K

Try locking then unlocking the doors using the remote do this several times. Do the same with the key in the drivers door.

Tolyk

Tried. This method did not work. Thanks

LeX2K

Does the security light go out when you insert the key?

Tolyk

When i insert the key into the ignition the security light is off. The car has a valet switch to return to factory settings?

LeX2K

I disconnect my battery all the time something else is going on with your car.

Tolyk

I disconnected the negative terminal for 10 minutes, tried to start, start up and stall. I tried to remove both terminals, does not help. I have one such problem?
Do all owners gave a car after the battery replacement the first time?

wmj259

Why did you change the battery?

Tolyk

The old battery has outlived

Tolyk

Replacing the battery resets the immobilizer stopped to recognize native the key. What actions can be used to restore the settings or re-register it?

wmj259

You would have to hope that if you have a spare master key, that it works. If not the ECM has to come out and the eeprom replaced/recoded

Tolyk

I only have one master key. Will it need to be recoded?

Tolyk

How to recoded it? Thank you

wmj259

1.) You would either have to remove the ECM and have it sent to be cleared.
2.) Or you can do it yourself to unsolder, recode and solder back a chip into the ECM.

The first route tends to be the easiest with less risk. Will cost about $80+.

You could call a locksmith and ask if they can reset the immobilizer with their equipment.

ilkinandr

You guys are making this too complicated for the poor soul. Here is a link.