2008 Toyota Tundra Owners Manual - Page 437

07 11.20 In the following cases, the buzzer will sound several times and the indicator will stay on to indicate that the system is not working properly. Rear sensors XS10062a D When the temperature is extremely low. D When any of the sensors are malfunction. If the indicator is continuously on, have your Toyota dealer check the system. If the indicator remains blinking but you do not hear the buzzer sound, clean the sensors with soft cloth. Rear corner sensors To turn on: Push the switch. The indicator comes on and the buzzer will sound. To turn off: Push the switch again. XS10064a Front corner sensors 407 2008 TUNDRA from Apr. '08 Prod. (OM34477U)