REAR ULTRASONIC SENSOR INSPECTION

• When inspecting the rear ultrasonic sensor, always use two or more persons to perform the work and be careful not to damage or scratch the vehicle. Otherwise, the vehicle can be damaged by use of prepared obstructions^*1 or noise absorption material^*2.

Step	Inspection	Action
1	VERIFY SURROUNDING ENVIRONMENT • Visually inspect if there is an obstruction within a 2 m radius around the vehicle. Caution • If there are obstructions within a 2 m radius around the vehicle, the rear ultrasonic sensor inspection cannot be performed correctly. • Are there obstructions within a 2 m radius around the vehicle?	Yes	Remove any obstruction which is within a 2 m radius around the vehicle, then go to the next step.
No	Go to the next step.
2	PERFORM PARKING SENSOR BUZZER OPERATION VERIFICATION • Switch the ignition ON (engine off). • Turn the parking sensor switch on. • Does the parking sensor buzzer activate?	Yes	Go to the next step.
No	Perform the inspection according to the symptom troubleshooting. (See SYMPTOM TROUBLESHOOTING [PARKING SENSOR SYSTEM].)
3	VERIFY IF PREPARED OBSTRUCTION^1 REFLECTS ULTRASONIC WAVES Note • Use the prepared obstruction in Step 5. • Shift the selector lever to the R position. • Move the prepared obstruction^1 closer to an area 1 m away from the vehicle rear. • Is the parking sensor buzzer activated at the warning sound interval according to the distance from the obstruction? (Paring Sensor Buzzer Warning Sound Interval (Reference))	Yes	Go to the next step.
No	Change the prepared obstruction^*1 to a different one, then perform Step 3 again. • If the parking sensor buzzer is not activated even though the obstruction has been changed to a different one, go to Step 6.
4	VERIFY IF PREPARED NOISE ABSORPTION MATERIAL^2 ABSORBS ULTRASONIC WAVES Note • Use the prepared noise absorption material in Step 5. • Cover the rear ultrasonic sensor with the noise absorption material^2. (Using masking tape) • Does the parking sensor buzzer remain activated?	Yes	Change the noise absorption material^*2 to a different material, then perform Step 4 again.
No	Remove the noise absorption material, then go to the next step.
5	INSPECT REAR ULTRASONIC SENSOR • Cover the rear ultrasonic sensors other than the rear ultrasonic sensor used for the inspection with the noise absorption material^2 used in Step 4 (using masking tape). • Switch the ignition ON (engine off). • Shift the selector lever to the R position. • Place the obstruction^1 used in Step 3 in front of the rear ultrasonic sensor for the inspection. • Is the parking sensor buzzer activated at the warning sound interval according to the distance from the obstruction^*1? (Paring Sensor Buzzer Warning Sound Interval (Reference))	Yes	The inspection is completed. (Rear ultrasonic sensor is normal)
No	Go to the next step.
6	VERIFY REAR BUMPER INSTALLATION CONDITION • Is the rear bumper installation condition normal?	Yes	Go to the next step.
No	Replace the rear bumper. (See REAR BUMPER REMOVAL/INSTALLATION.)
7	VERIFY EXTERNAL APPEARANCE OF REAR ULTRASONIC SENSORS AND INSTALLATION CONDITION • Are the external appearance of the rear ultrasonic sensors and the installation condition normal?	Yes	Replace the rear ultrasonic sensor. (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION.)
No	If there is an abnormality in external appearance: • Replace the rear ultrasonic sensor. If there is an abnormality in installation condition: • Install the rear ultrasonic sensor correctly, then repeat the diagnosis from Step 5.

Step

Inspection

Action

VERIFY SURROUNDING ENVIRONMENT

• Visually inspect if there is an obstruction within a 2 m radius around the vehicle.

Caution

• If there are obstructions within a 2 m radius around the vehicle, the rear ultrasonic sensor inspection cannot be performed correctly.

• Are there obstructions within a 2 m radius around the vehicle?

Yes

Remove any obstruction which is within a 2 m radius around the vehicle, then go to the next step.

Go to the next step.

PERFORM PARKING SENSOR BUZZER OPERATION VERIFICATION

• Switch the ignition ON (engine off).

• Turn the parking sensor switch on.

• Does the parking sensor buzzer activate?

Yes

Go to the next step.

Perform the inspection according to the symptom troubleshooting.

(See SYMPTOM TROUBLESHOOTING [PARKING SENSOR SYSTEM].)

VERIFY IF PREPARED OBSTRUCTION^*1 REFLECTS ULTRASONIC WAVES

Note

• Use the prepared obstruction in Step 5.

• Shift the selector lever to the R position.

• Move the prepared obstruction^*1 closer to an area 1 m away from the vehicle rear.

• Is the parking sensor buzzer activated at the warning sound interval according to the distance from the obstruction? (Paring Sensor Buzzer Warning Sound Interval (Reference))

Yes

Go to the next step.

Change the prepared obstruction^*1 to a different one, then perform Step 3 again.

• If the parking sensor buzzer is not activated even though the obstruction has been changed to a different one, go to Step 6.

VERIFY IF PREPARED NOISE ABSORPTION MATERIAL^*2 ABSORBS ULTRASONIC WAVES

Note

• Use the prepared noise absorption material in Step 5.

• Cover the rear ultrasonic sensor with the noise absorption material^*2. (Using masking tape)

• Does the parking sensor buzzer remain activated?

Yes

Change the noise absorption material^*2 to a different material, then perform Step 4 again.

Remove the noise absorption material, then go to the next step.

INSPECT REAR ULTRASONIC SENSOR

• Cover the rear ultrasonic sensors other than the rear ultrasonic sensor used for the inspection with the noise absorption material^*2 used in Step 4 (using masking tape).

• Switch the ignition ON (engine off).

• Shift the selector lever to the R position.

• Place the obstruction^*1 used in Step 3 in front of the rear ultrasonic sensor for the inspection.

• Is the parking sensor buzzer activated at the warning sound interval according to the distance from the obstruction^*1? (Paring Sensor Buzzer Warning Sound Interval (Reference))

Yes

The inspection is completed. (Rear ultrasonic sensor is normal)

Go to the next step.

VERIFY REAR BUMPER INSTALLATION CONDITION

• Is the rear bumper installation condition normal?

Yes

Go to the next step.

Replace the rear bumper. (See REAR BUMPER REMOVAL/INSTALLATION.)

VERIFY EXTERNAL APPEARANCE OF REAR ULTRASONIC SENSORS AND INSTALLATION CONDITION

• Are the external appearance of the rear ultrasonic sensors and the installation condition normal?

Yes

Replace the rear ultrasonic sensor. (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION.)

If there is an abnormality in external appearance:

• Replace the rear ultrasonic sensor.

If there is an abnormality in installation condition:

• Install the rear ultrasonic sensor correctly, then repeat the diagnosis from Step 5.

Ultrasonic sensor	Zone	Distance from obstruction	Parking sensor buzzer sound pattern
Rear corner sensor	Short distance	Approx. 0—25 cm {9.8 in}
	Intermediate distance	Approx. 25—38 cm {9.9—14.0 in}
	Long distance	Approx. 38—55 cm {15—21 in}
Rear sensor	Short distance	Approx. 0—35 cm {13 in}
	Intermediate distance	Approx. 35—45 cm {14—17 in}
	Long distance	Approx. 45—60 cm {18—23 in}
	Maximum long distance	Approx. 60—150 cm {24.0—59.0 in}