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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Parking Assist Monitor System - Diagnostics - Introduction >> Parking Assist Monitor System >> Problem Symptoms Table [12/2019 - 10/2022] >> Problem Symptoms Table [12/2019 - 10/2022]

Problem Symptoms Table [12/2019 - 10/2022]

NOTE:
  • The following inspection procedures for the parking assist monitor system are based on the assumption that the navigation system is normal. If the audio and visual system*1 or navigation system*2 has any malfunction, first proceed with troubleshooting of the audio and visual system*1 or navigation system*2.

    *1: w/ Audio and Visual System

    *2: w/ Navigation System

  • Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed.

    Refer to CALIBRATION [12/2019 - 10/2022] 

  • The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

    Refer to PRECAUTION [12/2019 - 11/2023]

HINT: 

GENERAL

Symptom Suspected Area Link
When the shift position is R, an image of the area behind the vehicle is not displayed (screen is not black) Proceed to "Reverse Signal Circuit" Refer to Reverse Signal Circuit [12/2019 - 10/2022]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
When the shift position is R, an image of the area behind the vehicle is not displayed (screen is black) Proceed to "Image from Camera for Parking Assist Monitor is Abnormal" Refer to Image from Camera for Parking Assist Monitor is Abnormal [12/2019 - 10/2022]
When the shift position is not R, an image of the area behind the vehicle is displayed Proceed to "Reverse Signal Circuit" Refer to Reverse Signal Circuit [12/2019 - 10/2022]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
When the shift position is R, an image of the area behind the vehicle is displayed and then switches to another image Proceed to "Reverse Signal Circuit" Refer to Reverse Signal Circuit [12/2019 - 10/2022]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
DISPLAY MALFUNCTION

Symptom Suspected Area Link
Parking assist monitor display malfunction (distortion of the color/screen) occurs continuously Proceed to "Image from Camera for Parking Assist Monitor is Abnormal" Refer to Image from Camera for Parking Assist Monitor is Abnormal [12/2019 - 10/2022]
Parking assist monitor display malfunction (distortion of the color/screen) occurs temporarily Check the usage conditions (explain to the customer that the display may be temporarily distorted when the vehicle is close to an object that transmits radio waves, such as a telecommunication tower, an airport or a truck equipped with a transceiver) -
PARKING ASSIST MONITOR SYSTEM MALFUNCTION

Symptom Suspected Area Link
Estimated course lines are not displayed Parking assist monitor screen display mode settings (check that estimated course line display mode is selected) -
Correct the steering angle neutral point (initialization) Refer to INITIALIZATION [12/2019 - 10/2022] 
Steering angle setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Steering sensor Refer to REMOVAL [12/2019 - 10/2022]
The estimated course lines stop moving before the steering wheel is fully turned to the right or left Steering angle setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
The vehicle width guide lines and estimated course lines do not match when the steering wheel is turned to the center position Check the installation of steering wheel Refer to INSTALLATION [12/2019 - ]
Correct the steering angle neutral point (initialization) Refer to INITIALIZATION [12/2019 - 10/2022] 
Steering angle setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
Check that the rear television camera assembly is correctly installed Refer to INSTALLATION [12/2019 - ]
Back camera position setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Steering sensor Refer to REMOVAL [12/2019 - 10/2022]
The guide lines are not displayed even though the back door is closed Check that the No. 1 room light assembly illuminates normally (if not, refer to Lighting System [INT] - Problem Symptoms Table) Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 11/2023]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
The guide lines remain displayed even though the back door is open Check that the No. 1 room light assembly illuminates normally (if not, refer to Lighting System [INT] - Problem Symptoms Table) Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 11/2023]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
"!" is displayed. Correct the steering angle neutral point (Initialization) Refer to INITIALIZATION [12/2019 - 10/2022] 
"!" mark remains displayed after the steering neutral point is corrected. Steering angle setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
Spiral cable sub-assembly Refer to REMOVAL [12/2019 - 10/2022]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Guide lines and buttons are not displayed for all parking assist monitor screen display modes. CAN communication system*1 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022]
CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022]
Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT) Refer to Back Door Courtesy Switch Circuit [12/2019 - 11/2023]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
The guide lines and buttons remain displayed even though the back door is open. CAN communication system*1 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022]
CAN communication system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022]
Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT) Refer to Back Door Courtesy Switch Circuit [12/2019 - 11/2023]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
When adjusting the camera optical axis, "You can not calibrate the camera when the door is open. Please close the door." is displayed even after the back door has been closed Check that the No. 1 room light assembly illuminates normally (if not, refer to Lighting System [INT] - Problem Symptoms Table) Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 11/2023]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
"CHK" message(s) are displayed on the signal check screen Signal check (diagnosis system) Refer to DIAGNOSIS SYSTEM [12/2019 - 10/2022] 
When an image of the area behind the vehicle is displayed, the lines are misaligned (the image from the camera is tilted) Back camera position setting (calibration) Refer to CALIBRATION [12/2019 - 10/2022] 
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]

*1: for Gasoline Model

*2: for HV Model

OTHERS

Symptom Suspected Area Link
A switch displayed on the parking assist monitor screen does not respond when pushed, or a switch other than the pushed switch responds. Proceed to "CHECK TOUCH SWITCH" in Navigation System*1 Refer to OPERATION CHECK [12/2019 - 10/2022]
Proceed to "CHECK TOUCH SWITCH" in Audio and Visual System*2 Refer to OPERATION CHECK [12/2019 - 10/2022]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
A beep sound is not emitted when a switch displayed on the parking assist monitor screen is pushed. Check the setting on the audio screen (general setting) -
Proceed to "CHECK TOUCH SWITCH" in Navigation System*1 Refer to OPERATION CHECK [12/2019 - 10/2022]
Proceed to "CHECK TOUCH SWITCH" in Audio and Visual System*2 Refer to OPERATION CHECK [12/2019 - 10/2022]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
The language of the messages displayed on the parking assist monitor screen cannot be changed. Check the setting on the audio screen (general setting) -
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
The switches displayed on the parking assist monitor screen are grayed out. Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]
The color of the switches displayed on the parking assist monitor screen are abnormal, or the switches are not dimmed when the headlights are turned on. Check the setting on the audio screen (screen adjustment) -
Proceed to "CHECK TOUCH SWITCH" in Navigation System*1 Refer to OPERATION CHECK [12/2019 - 10/2022]
Proceed to "CHECK TOUCH SWITCH" in Audio and Visual System*2 Refer to OPERATION CHECK [12/2019 - 10/2022]
Rear television camera assembly Refer to REMOVAL [12/2019 - 11/2023]
Radio and display receiver assembly Refer to REMOVAL [12/2019 - 10/2022]

*1: w/ Navigation System

*2: w/ Audio and Visual System