My 2005 ES300 has the original head unit with sat nav. One of the screen menu options is for security but I don't have the code to change it. The car has all the OEM security provided through the keys with engine immobilizer system. A previous owner has added two small microphone/ultrasonic sensors and an after market siren under the bonnet.
Does this model Lexus have an OEM security alarm system hidden under the dash to which the ultrasonic sonic alarm unit signal would be input to activate the alarm siren.
I haven't searched the under dash wiring and am not keen to do so.
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