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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Parking Support Brake System - Diagnostics - Introduction >> Parking Support Brake System >> Problem Symptoms Table [10/2022 - 11/2023] >> Problem Symptoms Table [10/2022 - 11/2023]

Problem Symptoms Table [10/2022 - 11/2023]

HINT: 

GENERAL

Symptom Suspected Area Link
System does not operate at all Intuitive parking assist system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Steering pad switch assembly Refer to REMOVAL [10/2022 - 11/2023]
Blind spot monitor system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
SONAR FUNCTION

Symptom Suspected Area Link
Detection function operates when the operating conditions are not met SFI System*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]
SFI System*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]
Hybrid control system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]
No. 2 skid control ECU (brake actuator assembly)*2 Refer to REMOVAL [10/2022 - 11/2023]
Skid control ECU (brake actuator assembly)*3 Refer to REMOVAL [10/2022 - 11/2023]
Blind spot monitor system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Detection function operates when vehicle is not within the required speed range (speedometer not malfunctioning) CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
BUZZER FUNCTION

Symptom Suspected Area Link
Parking support brake system is normal but buzzer operation is intermittent Check that the temporary mute function is not operating -
Proceed to "No. 1 Clearance Warning Buzzer Circuit" Refer to No. 1 Clearance Warning Buzzer Circuit [12/2019 - 11/2023]
Proceed to "No. 2 Clearance Warning Buzzer Circuit" Refer to No. 2 Clearance Warning Buzzer Circuit [12/2019 - 11/2023]
Proceed to "Buzzer does not Sound" Refer to Buzzer does not Sound [12/2019 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Blind spot monitor system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
DISPLAY FUNCTION

Symptom Suspected Area Link
While the parking support brake system is operating, no parking support brake notifications are displayed on the multi-information display. CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
While the parking support brake system is operating, no parking support brake notifications are displayed on the radio and display receiver assembly CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [10/2022 - 11/2023]
Rear television camera assembly*5 Refer to REMOVAL [12/2019 - 11/2023]
Parking assist ECU *4 Refer to REMOVAL [10/2022 - 11/2023]
While the parking support brake system is operating, no parking support brake notifications are displayed on the headup display.*1 CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Meter mirror sub-assembly Refer to REMOVAL [10/2022 - 11/2023]
"PKSB Malfunction Visit Your Dealer" is displayed CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
"PKSB Unavailable" is displayed Check that no foreign matter is attached to the ultrasonic sensors. -
Steering angle neutral point (Parking support brake system registration) Refer to CALIBRATION [12/2019 - 11/2023] 
CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
CAN communication system*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Intuitive parking assist system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Blind spot monitor system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]
Parking support brake system does not operate when there is a possibility of a collision (Warning message "PKSB Unavailable" not displayed) Check the installation of the ultrasonic sensors (front) Refer to INSTALLATION [12/2019 - 11/2023]
Check the installation of the ultrasonic sensors (rear) Refer to INSTALLATION [12/2019 - 11/2023]
Adjust the installation of the ultrasonic sensors as necessary. Refer to CALIBRATION [12/2019 - 11/2023] 
Ultrasonic sensors (front) Refer to REMOVAL [12/2019 - 11/2023]
Ultrasonic sensors (rear) Refer to REMOVAL [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Parking support brake system control operates when there is no possibility of a collision Check the installation of the ultrasonic sensors (front) Refer to INSTALLATION [12/2019 - 11/2023]
Check the installation of the ultrasonic sensors (rear) Refer to INSTALLATION [12/2019 - 11/2023]
Adjust the installation of the ultrasonic sensors as necessary. Refer to CALIBRATION [12/2019 - 11/2023] 
Ultrasonic sensors (front) Refer to REMOVAL [12/2019 - 11/2023]
Ultrasonic sensors (rear) Refer to REMOVAL [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
Parking support brake system control cannot be turned off (PKSB OFF indicator does not illuminate) Combination meter assembly (LED): Perform Active Test (Indicat. PKSB OFF LCD) Refer to DATA LIST / ACTIVE TEST [10/2022 - 11/2023]
Steering pad switch assembly Refer to REMOVAL [10/2022 - 11/2023]
Spiral cable sub-assembly Refer to REMOVAL [10/2022 - 11/2023]
Clearance warning ECU assembly Refer to REMOVAL [12/2019 - 11/2023]
PKSB OFF indicator blinks Check that no foreign matter is attached to the ultrasonic sensors. -
Steering angle neutral point (Parking support brake system registration) Refer to CALIBRATION [12/2019 - 11/2023] 
  1. *1: w/ Headup Display System
  2. *2: for HV Model
  3. *3: for Gasoline Model
  4. *4: w/ Panoramic View Monitor System
  5. *5: w/ Parking Assist Monitor System