Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 346

PM–8

PARK ASSIST / MONITORING – CLEARANCE SONAR SYSTEM

OPERATION CHECK

DETECTION RANGE MEASUREMENT AND
INDICATOR CHECK
(a) Turn the ignition switch ON.
(b) Move the shift lever to the reverse position (when

the back sonar is checked).
NOTICE:
Apply the parking brake securely so that the
vehicle does not move.

φ 60 mm (2.36 in.) pole around the sensor to

measure the detection ranges of the sensor.
NOTICE:
The measured detection ranges are for a

φ 60

mm (2.36in.) pole. The detection ranges for walls
and other obstacles are different.

(e) Check the buzzer sounding condition when the

ultrasonic sensor detects an obstacle.

Operation condition

HINT:
Since sound waves are used for the detection range
measurement, the detection range may vary a little
due to the outside air temperature.

Ultrasonic Sensor Detection Range:

Approximately 200 mm (7.87 in.)

Approximately 1,100 mm (43.31 in.)

Approximately 400 mm (15.75 in.)

Approximately 500 mm (19.69 in.)

Approximately 1,600 mm (62,99 in.)

I102680E01

Ignition switch

Clearance sonar main switch

Shift position

Reverse Position

PARK ASSIST / MONITORING – CLEARANCE SONAR SYSTEM

PM–9

CHECK INITIAL CHECK FUNCTION
(a) Check the initial check function for the buzzer. Turn

the ignition switch ON and turn the back sonar
switch ON. Regardless of shift lever position, the
buzzer will sound after approximately 0.4 seconds.
The buzzer sound will continue for approximately
1.0 +- 0.3 seconds. If the buzzer's initial check
pattern does not sound, there may be a malfunction
in the ignition switch, back sonar switch, clearance
warning buzzer and/or clearance warning ECU.

Detection within
500 +-50 mm (19.69 +-1.97 in.)

Detection within
500 +-50 mm (19.69 +-1.97 in.) to
1,000 +-100 mm (39.37 +-3.94 in.)

Detection within
1,000 +-100 mm (39.37 +-3.94 in.) to
1,500 +-150 mm (59.06 +-5.91 in.)

OFF

T1: 0.0075 seconds
T2: 0.255 seconds

Clearance Warning Buzzer

I102371E02

Detection
Mode

Back Sonar Switch ON

OFF

Approximately
0.4 seconds

1.0 +-0.3 seconds

Initial Check Pattern

I102372E02

PM–10

PARK ASSIST / MONITORING – CLEARANCE SONAR SYSTEM

(b) After checking the initial check function, check that

the buzzer fault pattern does not sound. If the
buzzer fault pattern sounds, there may be a problem
with the sensor and/or sensor wire harness. The
fault pattern will continue sounding until the problem
is fixed.

ADJUST BUZZER VOLUME
(a) Turn the knob on the clearance warning ECU to

adjust the volume.

Fault Pattern

OFF

Buzzer

+-0.025 seconds

1.5 +-0.5 seconds (1 cycle)

0.75 +-0.075 seconds

Normal Return

I102373E02

VOLUMU

ABS

I102663

PARK ASSIST / MONITORING – CLEARANCE SONAR SYSTEM

PM–11

PROBLEM SYMPTOMS TABLE

HINT:
•

Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Replace parts
as necessary.

•

Inspect the fuses and relays related to this system before
inspecting the suspected areas below.

Clearance sonar system

Symptom

Suspected area

See page

Initial check does not function

1. Clearance sonar main switch circuit

PM-19

2. Clearance sonar buzzer circuit

PM-21

3. Clearance warning buzzer