Operation Check

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INITIAL CHECK FUNCTION

Fig 1: LED And Buzzer Blinking Pattern
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Check the initial check function for the LED and buzzer.
  1. When the clearance sonar main switch is turned ON, check that the following occurs: 1) after 0.4 seconds, the buzzer sounds for approximately 0.7 to 1.3 seconds, and 2) the system starts the obstacle detection operation.
2. 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).
3. 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 2: LED And Buzzer Timing Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. When the ECU judges that the sensor needs to be cleaned:
    
    Fig 3: LED And Buzzer Timing Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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.

DETECTION RANGE MEASUREMENT AND INDICATOR CHECK

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

Turn the ignition switch ON.
Move the shift lever to the R position to check the front corner sensors, rear corner sensors and back sensors.
Move the shift lever to the D, S and N position to check the front corner sensors.
Turn the clearance sonar main switch ON.
Move a pole around the sensor to measure the detection range of the sensor.
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.
1. Front corner sensors detection range
  
  Fig 4: Identifying Front Corner Sensors Detection Range Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Rear corner sensors detection range
  
  Fig 5: Identifying Rear Corner Sensors Detection Range Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Back sensors detection range
  
  Fig 6: Identifying Back Sensors Detection Range Area
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Shift Lever Position	Vehicle Speed	Buzzer Detection, Accessory Meter Detection
Shift Lever Position	Vehicle Speed	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	◦	X	X
R	No Limit	◦	◦	◦

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

Fig 7: Identifying Buzzer Sounds Detection Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front corner detection range

FRONT CORNER DETECTION RANGE REFERENCE

Detection	Distance
1. Close-range detection	Within 250 +/-30 mm (9.84 +/-1.18 in.)
2. Medium-range detection	250 +/-30 to 400 +/-40 mm (9.84 +/-1.18 to 15.7 +/-1.57 in.)
3. Long-range detection	400 +/-40 to 600 +/-60 mm (15.7 +/-1.57 to 23.6 +/-2.36 in.)

Rear corner detection range

REAR CORNER DETECTION RANGE REFERENCE

Detection	Distance
1. Close-range detection	Within 400 +/-40 mm (15.7 +/-1.57 in.)
2. Medium-range detection	400 +/-40 to 520 +/-60 mm (15.7 +/-1.57 to 20.5 +/-2.36 in.)
3. Long-range detection	520 +/-60 to 850 +/-90 mm (20.5 +/-2.36 to 33.5 +/-3.54 in.)

Back detection range

BACK DETECTION RANGE REFERENCE

Detection	Distance
1. Close-range detection	Within 850 +/-85 mm (33.5 +/-3.35 in.)
2. Medium-range detection	850 +/-85 to 1150 +/-115 mm (33.5 +/-3.35 to 45.3 +/-4.53 in.)
3. Long-range detection	1150 +/-115 to 1800 +/-180 mm (45.3 +/-4.53 to 70.9 +/-7.09 in.)

HINT:

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

Check the indicator and buzzer on the accessory meter when the front corner sensors have detected an obstacle.

Operation condition;

OPERATION CONDITION CHART

Ignition Switch	Clearance Sonar Main Switch	Shift Lever Position	Vehicle Speed
ON	ON	D, S, N	10 km/h (6.2 mph) or less

Fig 8: Identifying Indicator And Buzzer On Accessory Meter When Front Corner Sensors Have Detected

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Accessory meter

INDICATOR AND BUZZER ACCESSORY METER REFERENCE

Detection Range	Buzzer	Indicator displayed
1. Close-range detection	Sounds continuously	Corner indicator(s) are illuminated
2. Medium-range detection	Sounds intermittently (ON: 75 msec. / OFF: 75 msec.)	Corner indicator(s) are blinking
3. Long-range detection	Sounds intermittently (ON: 150 msec. / OFF: 150 msec.)	Corner indicator(s) are blinking

HINT:

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

Check the accessory meter and buzzer when the front corner sensors, back sensors and rear corner sensors have detected an obstacle.

Operation condition:

INDICATOR AND BUZZER OPERATION CONDITION CHART

Ignition Switch	Clearance Sonar Main Switch	Shift Lever Position
ON	ON	R position

Fig 9: Identifying Indicator And Buzzer On Accessory Meter When Front Corner Sensors, Back Sensors And Rear Corner Sensors Detected

Accessory meter

INDICATOR AND BUZZER ACCESSORY METER REFERENCE

Detection Range	Buzzer	Indicator displayed
1. Close-range detection	Sounds continuously	Corner indicator(s) are illuminated and/or back indicator is illuminated
2. Medium-range detection	Sounds intermittently (ON: 75 msec. / OFF: 75 msec.)	Corner indicator(s) are blinking and/or back indicator is blinking
3. Long-range detection	Sounds intermittently (ON: 150 msec. / OFF: 150 msec.)	Corner indicator(s) are blinking and/or back indicator is blinking

HINT:

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.