Clearance Sonar System - Operation Check

Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING


CLEARANCE SONAR SYSTEM - OPERATION CHECK

SELF-CHECK FUNCTION INSPECTION
Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

Turn the engine switch on (IG).

When the clearance sonar system is turned ON, check that the following occurs: 1) after 0.1 milliseconds, the buzzer sounds for approximately 0.8 seconds, and 2) the system starts the obstacle detection operation.

  • HINT:
If a sensor has an open circuit or a sensor's detection operation malfunctions because it is wet or frozen, a malfunction display is shown in the multi-information display or multi-display, and the buzzer sounds.
When the sensor condition returns to normal, the system ends normal clearance sonar mode.
If the clearance sonar main switch is ON and the engine switch is turned on (IG), the buzzer does not sound.
MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)

Ultrasonic sensor open circuit

If there is an open circuit between the ultrasonic sensor and the clearance warning ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • HINT:
The example shows an open circuit in the ultrasonic sensor (front left sensor).
If a sensor has an open circuit, refer to "open circuit is displayed during self-check function" on the Problem Symptoms Table to inspect it.

Ultrasonic sensor frozen

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

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • HINT:
The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.
If "CLEAN SONAR" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.
MALFUNCTION DISPLAY (MULTI-DISPLAY)

Ultrasonic sensor open circuit

If there is an open circuit between the ultrasonic sensor and the clearance warning ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • HINT:
This example shows an open circuit in the ultrasonic sensor (rear right sensor).
If a sensor has an open circuit, refer to "open circuit is displayed during self-check function" on the Problem Symptoms Table to inspect it.

Ultrasonic sensor frozen

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

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • HINT:
The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.
If "CLEAN SONAR" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.
DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

Detection range measurement

  • NOTICE:
  • Make sure the vehicle does not move by applying the parking brake firmly.

Turn the engine switch on (IG).

Release the parking brake lever (M/T).

Move the shift lever to reverse position to check the ultrasonic sensors (rear sensors).

Turn the clearance sonar main switch ON.

Move a φ 60 mm (2.36 in.) pole near each sensor to measure its detection range.

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

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

When the ultrasonic sensors (front clearance sonar) have detected an obstacle, check the displays and buzzer sounds.

Operation condition (for A/T models):
Engine SwitchClearance Sonar Main SwitchShift Lever PositionVehicle Speed
ON (IG)ONIn any position except P6 mph (10 km/h) or less
Operation condition (for M/T models):
Engine SwitchClearance Sonar Main SwitchParking Brake LeverVehicle Speed
ON (IG)ONRelease6 mph (10 km/h) or less

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • Standard:
  • Multi-information display (A/T models: shift lever position not in P, M/T models: Release the parking brake)
    Detection RangeDuring Judgment
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (Blinking)
    No steering guide mark
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (illuminated)
    No steering guide mark
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (illuminated)
    No steering guide mark
  • Multi-display (A/T models: shift lever position not in P, M/T models: Release the parking brake)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (red illumination)
    No steering guide mark
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (yellow illumination)
    No steering guide mark
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (yellow illumination)
    No steering guide mark
  • With rear view monitor (shift lever position R)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    *4: Illumination (red)
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms. / OFF: 75 ms)
    *4: Blinking (yellow)
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    *4: Blinking (yellow)
  • HINT:
Ultrasonic waves are used to measure the detection range; however, the detection range may vary depending on the ambient temperature.

When the ultrasonic sensors (back sonar) have detected an obstacle, check the display and buzzer sounds.

Operation condition:
Engine SwitchClearance Sonar Main SwitchShift Lever PositionVehicle Speed
ON (IG)ONReverse Position6 mph (10 km/h) or less

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • Standard:
  • Multi-information display (shift lever position R)
    Detection RangeDuring Detection
    *1
    Close-range detection
    Within approx. 350 +- 50 mm (13.78 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (blinking)
    *2
    Medium-range detection
    From approx. 350 +- 50 to 450 +- 50 mm (13.78 +- 1.97 to 17.72 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (illuminated)
    *3
    Long-range detection
    From approx. 450 +- 50 to 600 +- 60 mm (17.72 +- 1.97 to 23.62 +- 2.36 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (illuminated)
    *4
    Maximum long-range detection
    From approx. 600 +- 60 to 1,500 +-150 mm (23.62 +- 2.36 to 59.06 +- 5.91 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 650 ms)
    Number of bars displayed: 4 (illuminated)
  • Multi-display (shift lever position R)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 350 +- 50 mm (13.78 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (red illumination)
    *2
    Medium-range detection
    From approx. 350 +- 50 to 450 +- 50 mm (13.78 +- 1.97 to 17.72 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (yellow illumination)
    *3
    Long-range detection
    From approx. 450 +- 50 to 600 +- 60 mm (17.72 +- 1.97 to 23.62 +- 2.36 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (yellow illumination)
    *4
    Maximum long-range detection
    From approx. 600 +- 60 to 1,500 +-150 mm (23.62 +- 2.36 to 59.06 +- 5.91 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 650 ms)
    Number of bars displayed: 4 (yellow illumination)
  • With rear view monitor (shift lever position R)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 350 +- 5 mm (13.78 +- 1.97 in.)    		Buzzer: Sounds continuously
    *5: Illumination (red)
    *2
    Medium-range detection
    From approx. 350 +- 50 to 450 +- 50 mm (13.78 +- 1.97 to 17.72 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    *5: Blinking (yellow)
    *3
    Long-range detection
    From approx. 450 +- 50 to 600 +- 50 mm (17.72 +- 1.97 to 23.62 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    *5: Blinking (yellow)
    *4
    Maximum long-range detection
    From approx. 600 +- 50 to 1,500 mm (23.62 +- 1.97 to 59.06in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 650 ms)
    *5: Blinking (yellow)
  • HINT:
  • Ultrasonic waves are used to measure the detection range; however, the detection range may vary depending on the ambient temperature.

When the ultrasonic sensors (rear clearance sonar) have detected an obstacle, check the display and buzzer sounds.

Operation condition:
Engine SwitchClearance Sonar Main SwitchShift Lever PositionVehicle Speed
ON (IG)ONReverse Position6 mph (10 km/h) or less

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

Clearance Sonar System - Operation Check. PARK ASSIST / MONITORING. Lexus IS250 IS220d GSE20 ALE20

  • Standard:
  • Multi-information display (shift lever position R)
    Detection RangeDuring Detection
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (blinking)
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (illuminated)
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 2.36 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (illuminated)
  • Multi-display (shift lever position R)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (red illumination)
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    Number of bars displayed: 2 (yellow illumination)
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 2.36 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    Number of bars displayed: 3 (yellow illumination)
  • With Rear view monitor (shift lever position R)
    Detection RangeDuring Collision Judgment
    *1
    Close-range detection
    Within approx. 250 +- 50 mm (9.84 +- 1.97 in.)    		Buzzer: Sounds continuously
    *4 : Illumination (red)
    *2
    Medium-range detection
    From approx. 250 +- 50 to 375 +- 50 mm (9.84 +- 1.97 to 14.76 +- 1.97 in.)    		Buzzer: Sounds intermittently (ON: 75 ms / OFF: 75 ms)
    *4: Blinking (yellow)
    *3
    Long-range detection
    From approx. 375 +- 50 to 500 +- 50 mm (14.76 +- 1.97 to 19.69 +- 2.36 in.)    		Buzzer: Sounds intermittently (ON: 150 ms / OFF: 150 ms)
    *4: Blinking (yellow)
  • HINT:
  • Ultrasonic waves are used to measure the detection range; however, the detection range may vary depending on the ambient temperature.