2005 Lexus GX 470 Owners Manual - Page 480

STARTING AND DRIVING Selector switch 2 sets of ID codes can be registered. The code of the tires originally installed on the vehicle is registered on the switch at "MAIN". Have a new tires set with new air pressure sensors registered at "2nd" by Lexus dealer. ID codes should be registered by Lexus dealer. Once registered, change the setting position each time you purchase tires and wheels. Re-registration is not required. When purchasing new tires, consult your Lexus dealer. CAUTION " 1 Main position 2 2nd position The selector switch is located in the lower part of the driver's side instrument panel. The ID code is given in the sensor. To activate the air pressure warning system, it is necessary to register the ID code of the sensor on the selector switch in the vehicle. When the tires whose ID code is registered at "MAIN" are used, the system does not work properly with the selector switch set at "2nd". If the tires whose ID code is registered at "2nd" are stored nearby, the system will detect their tire pressure (and vice versa). 455