Lexus Troubleshooting Questions? Ask a Lexus Expert
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When unlocking the truck with the remote you should see the light flash and the beep. This is normal operation. If there is a problem with it not flashing the light and beeping when you lock it then in order to determine what is causing this problem you are going to need to start with having the system scanned and see if there are any fault codes setting int he system. With out doing so there really is no way to know what is causing this if in fact you do have a problem with the system.