Operation Check [11/2017 - 03/2019]

Self-diagnosis System

If the clearance warning ECU assembly detects that an ultrasonic sensor is malfunctioning, a malfunction indication is displayed on the combination meter assembly and multi-display assembly.

Malfunctioning Item	Detection Condition	Warning Message (Multi-information Display)	Malfunction Indication (Combination Meter Assembly)	Malfunction Indication (Multi-display Assembly)	Buzzer Sounding (Multi-information Display)	Suspected Area
Frozen indication	The No. 1 ultrasonic sensor is covered with foreign matter, such as mud or snow The No. 1 ultrasonic sensor is frozen	Clean Park Sonar	◦	◦	◦	Check if any foreign matter is attached to the ultrasonic sensors and their surrounding areas Refer to PRECAUTION [11/2017 - 01/2023] If there is no foreign matter attached to the ultrasonic sensors and their surrounding areas, check for DTCs Refer to DTC CHECK / CLEAR [09/2014 - ]
Open circuit indication	There is an open circuit between the clearance warning ECU assembly and the No. 1 ultrasonic sensor The No. 1 ultrasonic sensor is malfunctioning	Check Park Sonar System	◦	◦	◦	Check for DTCs Refer to DTC CHECK / CLEAR [09/2014 - ]

Malfunction Indication (Combination Meter Assembly)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Open circuit indication

Frozen indication

Buzzer Sounding (No. 1 Clearance Warning Buzzer)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Buzzer sounding is stopped after approximately 7.5 seconds elapsed.

DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

NOTE:

Perform the following measurement and inspection with the shift lever in a position other than P. Be sure to apply the parking lever and depress the brake pedal firmly to prevent the vehicle from moving.

Turn the engine switch on (IG).
Turn the back sonar or clearance sonar switch assembly on.

Detection range measurement:

Move the shift lever according to the table below.

Measurement Area	Shift Lever Position
Front Corner	In any position other than P
Rear Corner	R
Rear Center	R

Move a 60 mm (2.4 in.) diameter pole near each sensor to measure its detection range. When measuring the longest-range detection of the rear center sonar, use a wall or equivalent.

NOTE:

These detection ranges are applicable when positioning the 60 mm (2.4 in.) diameter pole parallel or perpendicular to the ground. The detection range varies depending on the measuring method and type of obstacle (such as walls).

HINT:

Have an assistant move the pole.

Corner Sonar Detection Range

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

The No. 1 ultrasonic sensor side view detection range (hatched area labeled (B)) represents the cross section of the top view detection range (A). The hatched area (B) does not represent the entire side view detection range.

Rear Center Sonar Detection Range

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front corner sonar display and buzzer operation check

When the No. 1 ultrasonic sensors (front corner sonar) have detected an obstacle, check the displays and check that the buzzer sounds.

OPERATION CONDITION

Engine Switch	Back Sonar or Clearance Sonar Switch Assembly	Shift Lever Position	Vehicle Speed
On (IG)	On	In any position other than P or R	Less than approximately 15 km/h (9 mph) if speed is increasing Less than approximately 10 km/h (6 mph) if speed is decreasing
On (IG)	On	R	-

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Multi-information Display	*b	Multi-display
*c	Example (Front Corner Sonar)	*d	Close-range Detection
*e	Medium-range Detection	*f	Long-range Detection

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard

MULTI-INFORMATION DISPLAY AND BUZZER

Detection Range	During Judgment	Obstacle
Close-range detection Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)	Buzzer: Sounds continuously Number of bars displayed: 1 (blinking)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 300 +/- 30 to 400 +/- 40 mm (11.8 +/- 1.18 to 15.7 +/- 1.57 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Number of bars displayed: 2 (illuminated)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 400 +/- 40 to 500 +/- 50 mm (15.7 +/- 1.57 to 19.7 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.) Number of bars displayed: 3 (illuminated)	60 mm (2.4 in.) diameter pole

MULTI-DISPLAY AND BUZZER

Detection Range	During Judgment	Obstacle
Close-range detection Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)	Buzzer: Sounds continuously Color of bars displayed: Red (illuminated)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 300 +/- 30 to 400 +/- 40 mm (11.8 +/- 1.18 to 15.7 +/- 1.57 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 400 +/- 40 to 500 +/- 50 mm (15.7 +/- 1.57 to 19.7 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole

HINT:

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

Rear corner sonar display and buzzer operation check

When the No. 1 ultrasonic sensors (rear corner sonar) have detected an obstacle, check the display and check that the buzzer sounds.

OPERATION CONDITION

Engine Switch	Back Sonar or Clearance Sonar Switch Assembly	Shift Lever Position	Vehicle Speed
On (IG)	On	R	-

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Multi-information Display	*b	Multi-display
*c	Example (Rear Corner Sonar)	*d	Close-range Detection
*e	Medium-range Detection	*f	Long-range Detection

Standard

MULTI-INFORMATION DISPLAY AND BUZZER

Detection Range	During Judgment	Obstacle
Close-range detection Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)	Buzzer: Sounds continuously Number of bars displayed: 1 (blinking)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 300 +/- 30 to 450 +/- 40 mm (11.8 +/- 1.18 to 17.7 +/- 1.57 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Number of bars displayed: 2 (illuminated)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 450 +/- 40 to 600 +/- 50 mm (17.7 +/- 1.57 to 23.6 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.) Number of bars displayed: 3 (illuminated)	60 mm (2.4 in.) diameter pole

MULTI-DISPLAY AND BUZZER

Detection Range	During Detection	Obstacle
Close-range detection Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)	Buzzer: Sounds continuously Color of bars displayed: Red (illuminated)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 300 +/- 30 to 450 +/- 40 mm (11.8 +/- 1.18 to 17.7 +/- 1.57 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 450 +/- 40 to 600 +/- 50 mm (17.7 +/- 1.57 to 23.6 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole

HINT:

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

Rear center sonar display and buzzer operation check

When the No. 1 ultrasonic sensors (rear center sonar) have detected an obstacle, check the display and check that the buzzer sounds.

OPERATION CONDITION

Engine Switch	Back Sonar or Clearance Sonar Switch Assembly	Shift Lever Position	Vehicle Speed
On (IG)	On	R	-

*a	Multi-information Display	*b	Multi-display
*c	Example (Rear Center Sonar)	*d	Close-range Detection
*e	Medium-range Detection	*f	Long-range Detection
*g	Longest-range Detection	-	-

Standard

MULTI-INFORMATION DISPLAY AND BUZZER

Detection Range	During Detection	Obstacle
Close-range detection Within approx. 350 +/- 40 mm (13.8 +/- 1.57 in.)	Buzzer: Sounds continuously Number of bars displayed: 1 (blinking)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 350 +/- 40 to 450 +/- 50 mm (13.8 +/- 1.57 to 17.7 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Number of bars displayed: 2 (illuminated)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 450 +/- 50 to 600 +/- 60 mm (17.7 +/- 1.97 to 23.6 +/- 2.36 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.) Number of bars displayed: 3 (illuminated)	60 mm (2.4 in.) diameter pole
Longest-range detection From approx. 600 +/- 60 to 1500 +/- 150 mm (23.6 +/- 2.36 to 59.1 +/- 5.91 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.) Number of bars displayed: 4 (illuminated)	Wall

MULTI-DISPLAY AND BUZZER

Detection Range	During Detection	Obstacle
Close-range detection Within approx. 350 +/- 40 mm (13.8 +/- 1.57 in.)	Buzzer: Sounds continuously Color of bars displayed: Red (illuminated)	60 mm (2.4 in.) diameter pole
Medium-range detection From approx. 350 +/- 40 to 450 +/- 50 mm (13.8 +/- 1.57 to 17.7 +/- 1.97 in.)	Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole
Long-range detection From approx. 450 +/- 50 to 600 +/- 60 mm (17.7 +/- 1.97 to 23.6 +/- 2.36 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec./ OFF: 0.15 sec.) Color of bars displayed: Yellow (blinking)	60 mm (2.4 in.) diameter pole
Longest-range detection From approx. 600 +/- 60 to 1500 +/- 150 mm (23.6 +/- 2.36 to 59.1 +/- 5.91 in.)	Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.) Color of bars displayed: Yellow (blinking)	Wall

HINT:

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