Toyota Tacoma 2015-2018 Service Manual: Operation Check

OPERATION CHECK

1. MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)

(a) Open circuit indication

(1) If there is an open circuit between a No. 1 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

HINT:

If a sensor has an open circuit, check for DTCs and troubleshoot according to each inspection procedure (See page ).

(b) Frozen indication

(1) If a sensor is covered with foreign matter, such as mud or snow, the affected sensor is displayed as shown in the illustration.

2. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

NOTICE:

The following measurement and inspection will be performed 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.

(a) Turn the ignition switch to ON.

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

(c) Detection range measurement:

(1) Move the shift lever according to the table below.

Measurement Area	Shift Lever Position
Rear Corner	R
Rear Center

(2) Move a 60 mm (2.36 in.) diameter pole near each sensor to measure its detection range. When measuring the longest-range detection of the front center sonar and the rear center sonar, use a wall or equivalent.

NOTICE:

These detection ranges are applicable when positioning the 60 mm (2.36 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.

NOTICE:

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.

(d) Rear corner sonar display and buzzer operation check

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

Operation Condition

Ignition Switch	Back Sonar or Clearance Sonar Switch Assembly	Shift Lever Position	Vehicle Speed
ON	On	R	-

Text in Illustration

*a	Close-range Detection
*b	Medium-range Detection
*e	Long-range Detection

Standard:

Multi-information Display and Buzzer

Detection Range	During Judgment	Obstacle
Close-range detection Within approximately 400 +/- 40 mm (15.7 +/- 1.57 in.)	Buzzer: Sounds continuously Number of bars displayed: 1 (blinking)	60 mm (2.36 in.) diameter pole
Medium-range detection From approximately 400 +/- 40 to 600 +/- 60 mm (15.7 +/- 1.57 to 23.6 +/- 2.36 in.)	Buzzer: Sounds intermittently (ON: 0.075 seconds / OFF: 0.075 seconds) Number of bars displayed: 2 (illuminated)	60 mm (2.36 in.) diameter pole
Long-range detection From approximately 600 +/- 60 to 850 +/- 90 mm (23.6 +/- 2.36 to 33.5 +/- 3.54 in.)	Buzzer: Sounds intermittently (ON: 0.15 seconds / OFF: 0.15 seconds) Number of bars displayed: 3 (illuminated)	60 mm (2.36 in.) diameter pole

HINT:

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

(e) Rear center sonar display and buzzer operation check

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

Operation Condition

Ignition Switch	Back Sonar or Clearance Sonar Switch Assembly	Shift Lever Position	Vehicle Speed
ON	On	R	-

Text in Illustration

*a	Close-range Detection
*b	Medium-range Detection
*c	Long-range Detection
*d	Longest-range Detection

Standard:

Multi-information Display and Buzzer

Detection Range	During Detection	Obstacle
Close-range detection Within approximately 500 +/- 50 mm (19.7 +/- 1.97 in.)	Buzzer: Sounds continuously Number of bars displayed: 1 (blinking)	60 mm (2.36 in.) diameter pole
Medium-range detection From approximately 500 +/- 50 to 750 +/- 80 mm (19.7 +/- 1.97 to 29.5 +/- 3.15 in.)	Buzzer: Sounds intermittently (ON: 0.1 seconds / OFF: 0.1 seconds) Number of bars displayed: 2 (illuminated)	60 mm (2.36 in.) diameter pole
Long-range detection From approximately 750 +/- 80 to 1000 +/- 100 mm (29.5 +/- 3.15 to 39.4 +/- 3.94 in.)	Buzzer: Sounds intermittently (ON: 0.2 seconds / OFF: 0.2 seconds) Number of bars displayed: 3 (illuminated)	60 mm (2.36 in.) diameter pole
Longest-range detection From approximately 1400 +/- 140 to 1800 +/- 180 mm (39.4 +/- 3.94 to 70.9 +/- 7.09 in.)	Buzzer: Sounds intermittently (ON: 0.2 seconds / OFF: 0.5 seconds) Number of bars displayed: 4 (illuminated)	Wall

HINT:

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