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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Monitor System - Service Information >> ULTRASONIC SENSOR (for Rear) >> Removal [11/2023 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during ultrasonic sensor removal/installation are shown below.

NECESSARY PROCEDURE AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function When Necessary Procedures are not Performed Link
Ultrasonic sensor w/o Parking Support Brake System: 
  1. Initialization of ultrasonic sensor
 Intuitive Parking Assist System Refer to CALIBRATION [11/2023 - ]
w/ Parking Support Brake System: 
  • Measurement of ultrasonic sensor height and angle
  • Ultrasonic sensor detection angle registration
  • Intuitive Parking Assist System
  • Parking Support Brake System
 Refer to CALIBRATION [11/2023 - ]

*1: Learning can also be performed using the GTS.

NOTE:
  • After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 2 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
  • When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal.

HINT: 

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

LEARNING COMPLETES WHEN VEHICLE IS DRIVEN

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Stop and Start System Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted Refer to PRECAUTION [11/2023 - ]
Lane Control System
Pre-collision System Perform steering sensor zero point calibration Refer to INITIALIZATION [12/2019 - ]
Lighting System (EXT) (w/ AFS)
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Power Door Lock Control System Initialize back door lock Refer to INITIALIZATION [11/2023 - ]
Power Back Door System Reset back door close position Refer to INITIALIZATION [11/2023 - ]
Air Conditioning System After the ignition switch is turned to ON, the servo motor standard position is recognized. -
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