Toyota Tundra Service Manual: System Description

SYSTEM DESCRIPTION

1. GENERAL

(a) When the vehicle is driven at 10 km/h (6.2 mph) or less, the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle. The system then informs the driver of the distance between the sensors and the obstacles as well as their positions by indicating them and by sounding a buzzer on the combination meter assembly.

2. FUNCTION OF COMPONENTS

3. OPERATION EXPLANATION

(a) The clearance warning ECU assembly determines whether the intuitive parking assist system should be operated based on the back sonar or clearance sonar switch ON/OFF status, the shift position and the vehicle speed.

(b) When the system operates, the clearance warning ECU assembly transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within one or more of the sensors' ranges, the waves are reflected back to the sensors, which transmit them as a signal to the clearance warning ECU assembly. Based on this information, the clearance warning ECU assembly sends signals to the indicator and the clearance warning buzzer. The approximate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds.

HINT:

Refer to "OPERATION CHECK" for the detailed operation (See page ).