Toyota Tundra. Manual — part 590

0.4 seconds, the buzzer sounds for approximately 0.7 to 1.3 seconds, and 2) the system starts
the obstacle detection operation.

b. Check the initial check function for the sensor.



Approximately 0.4 seconds after the ignition switch has been turned to the ON position and
the clearance sonar main switch has been turned ON, all sensors will be checked by the
system.



After 1 +/-0.3 seconds have elapsed, the check operation for all of the sensors will stop when
a vehicle speed of over 10 km/h (6 mph) is detected.



When the vehicle has been shifted from the P position, the system will change to the obstacle
detection operation according to the shift position.



If there are no changes in the conditions, such as those listed above (speed or shift position),
the sensor check operation will be halted after 5 +/-1 second have elapsed. If one or more
sensors are anomalous, check operation for all of the sensors will continue (sensors will
continue transmitting).

c. If the sensor is found to have an anomaly due to an open circuit or freezing for approximately 5

seconds or more, indications as shown in the following illustration appear.

1. When the ECU judges that the sensor needs to be repaired:

Fig. 5: LED And Buzzer Timing Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. When the ECU judges that the sensor needs to be cleaned:

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

Fig. 6: LED And Buzzer Timing Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:



When the sensor condition returns to normal, the system ends normal clearance sonar
mode and returns to steering sensing mode.



If the clearance sonar main switch is ON and the ignition switch is turned ON, the
buzzer does not sound.

2. DETECTION RANGE MEASUREMENT AND INDICATOR CHECK

a. Turn the ignition switch ON.

b. Move the shift lever to the R position to check the front corner sensors, rear corner sensors and

back sensors.

c. Move the shift lever to the D, S and N position to check the front corner sensors.

d. Turn the clearance sonar main switch ON.

e. Move a pole around the sensor to measure the detection range of the sensor.

1. Front corner sensors detection range

NOTE:

Apply the parking brake securely so that the vehicle does not move.

NOTE:



These detection ranges are applicable when positioning the
pole parallel or perpendicular to the ground.



The ranges vary depending on the measuring method and type
of obstacle (such as walls).



For close-range and medium-range detection, the values shown
are for when using a pole with a diameter of 60 mm (2.36 in.).
For long-range detection, the values shown are for when using
a pole with a diameter of 400 mm (15.7 in.).



The detection range of the resin bumper and steel bumper are
not the same, as their installation positions are slightly
different.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

Fig. 7: Identifying Front Corner Sensors Detection Range Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. Rear corner sensors detection range

Fig. 8: Identifying Rear Corner Sensors Detection Range Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Back sensors detection range

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

Fig. 9: Identifying Back Sensors Detection Range Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

f. When the ultrasonic sensors have detected an obstacle, check the accessory meter and buzzer

sounds with the clearance sonar main switch ON.

Operation condition:

BACK SENSORS DETECTION RANGE OPERATION CONDITION CHART

1. Check the buzzer sounds with the clearance sonar main switch ON.

Shift Lever

Position

Vehicle Speed

Buzzer Detection, Accessory Meter Detection

Front Corner LH

Front Corner RH

Back LH

Back RH

Rear Corner LH Rear

Corner RH

P

-

X

X

X

D, S, (N)

10 km/h (6.2mph)

or less

o

X

X

R

No Limit

o

o

o

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra