Toyota Parking Assist-Sensor System (W/O Multi-Display) Operation Check

Check the initial check function for the buzzer.

1. When the back sonar or clearance sonar 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.
   

Check the initial check function for the sensor.

1. Approximately 0.4 seconds after the ignition switch is turned to ON and the back sonar or clearance sonar switch is turned on, all the sensors are checked by the system.
   
2. When the shift lever is operated, the system starts the obstacle detection operation.
   

If a sensor is found to have an anomaly due to an open circuit, the buzzer sounds after the initial check function is completed to inform the driver and indicate which sensor is abnormal.

1. When the ECU determines that the sensor needs to be repaired or cleaned:
   

   
   
   
   




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

   
   
   
   

   HINT:

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

Turn the ignition switch to ON.

Turn the back sonar or clearance sonar switch on.

Move the shift lever to R to check the rear corner sensors and rear center sensors.

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

NOTICE:

1. These detection ranges are applicable when positioning a pole with a diameter of 60 mm (2.36 in.) parallel or perpendicular to the ground.
   
2. The ranges vary depending on the measuring method and type of obstacle (such as walls).
   
3. 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 walls.
   
4. The No. 1 ultrasonic sensor side view detection range hatched area*1 represents the cross section of the top view of the detection range along the lines labeled A. The hatched area*1 does not represent the entire side view detection range.
   

1. Rear corner sensor detection range
   

   
   
   
   




2. Rear center sensor detection range
   

   
   
   
   

When the ultrasonic sensors have detected an obstacle, check that the buzzer sounds with the back sonar or clearance sonar switch on.

1. Check that the buzzer sounds with the back sonar or clearance sonar switch on.
   

   
   
   
   
   

   Rear Corner Detection Range

   Detection	Distance
   1. Close-range detection	Within 250 +/-30 mm (9.84 +/-1.18 in.)
   2. Medium-range detection	250 +/-30 to 375 +/-40 mm (9.84 +/-1.18 to 14.8 +/-1.57 in.)
   3. Long-range detection	375 +/-40 to 550 +/-60 mm (14.8 +/-1.57 to 21.7 +/-2.36 in.)

   
   

   Rear Center Detection Range

   Detection	Distance
   1. Close-range detection	Within 400 +/-40 mm (15.7 +/-1.57 in.)
   2. Medium-range detection	400 +/-40 to 500 +/-50 mm (15.7 +/-1.57 to 19.7 +/-1.97 in.)
   3. Long-range detection	500 +/-50 to 650 +/-70 mm (19.7 +/-1.97 to 25.6 +/-2.76 in.)
   4. Maximum long-range detection	650 +/-70 to 1500 +/-150 mm (25.6 +/-2.76 to 59.1+/-5.91 in.)

   HINT:

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





2. Check the indicator and buzzer when the rear center sensors and rear corner sensors have detected an obstacle.
   
   

   Operation Condition

   Ignition Switch	Back Sonar or Clearance Sonar Switch	Shift Lever Position
   ON	On	R

   
   

   Buzzer

   Detection Range	Buzzer
   1. Close-range detection	Sounds continuously
   2. Medium-range detection	Sounds intermittently (On: 75 msec./Off: 75 msec.)
   3. Long-range detection	Sounds intermittently (On: 150 msec./Off: 150 msec.)
   4. Maximum long-range detection	Sounds intermittently (On: 150 msec./Off: 650 msec.)

   
   

   Clearance Warning Indicator

   Detection Range	Indicator Displayed
   1. Close-range detection	Corner indicator(s) are illuminated and/or back indicator is illuminated
   2. Medium-range detection	Corner indicator(s) are blinking and/or back indicator is blinking
   3. Long-range detection	Corner indicator(s) are blinking and/or back indicator is blinking
   4. Maximum long-range detection	Back indicator is blinking

   
   
   
   
   

   Text in Illustration

   *1	Clearance warning indicator	-	-
   *a	Corner indicator	*b	Back indicator

   HINT:

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