2007 Lexus LS 460 Owners Manual - Page 540

4-3. Do-it-yourself maintenance Registering ID codes The tire pressure warning valve and transmitter is equipped with a unique ID code. When replacing a tire pressure warning valve and transmitter, it is necessary to register the ID code of tire pressure warning valve and transmitter. Have the ID code registered by your Lexus dealer. If the ID code is not registered, the system will not work properly. After more than 20 minutes, the tire pressure warning light blinks to indicate a system malfunction. n When to replace your vehicle's tires Tires should be replaced if: l You have tire damage such as cuts, splits, cracks deep enough to expose the fabric or bulges indicating internal damage l A tire goes flat repeatedly or cannot be properly repaired due to the size or location of a cut or other damage If you are not sure, consult with your Lexus dealer. n Tire life Any tire over 6 years old must be checked by a qualified technician even if they have seldom or never been used or damage is not obvious. n If the tread wears down below 0.16 in. (4 mm) on snow tires The effectiveness of snow tires is lost. n If the tire pressure warning reset switch is pressed while the vehicle is moving Initialization will not be performed. Before performing initialization, stop the vehicle in a safe place and turn off the engine. (→P. 512) n If you push the tire pressure reset switch accidentally If initialization is performed, adjust the tire inflation pressure to the specified level and initialize the system again. n When the initialization of the tire pressure warning system has failed Initialization can be completed in a few minutes. However, in the following cases, the settings has not been recorded and the system will not operate properly. If repeated attempts to record tire inflation pressure settings are unsuccessful, have the vehicle inspected by your Lexus dealer. 514