Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

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

    w/ Navigation System*1:

    Click here

    w/ Audio and Visual System (for 8 Inch Display)*2:

    Click here

    w/ Audio and Visual System (for 12.3 Inch Display)*2:

    Click here

    *1: w/ Navigation System

    *2: w/ Audio and Visual 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.

    Click here

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
General

Symptom

Suspected Area

Link

When the shift lever is in R, the parking assist monitor image is not displayed (screen is not black).

Proceed to "Reverse Signal Circuit"

Multi-display assembly

When the shift lever is in R, the parking assist monitor image is not displayed (screen is black).

Proceed to "Image from Camera for Parking Assist Monitor is Abnormal"

Multi-display assembly

When the shift lever is not in R, an image of the area behind the vehicle is displayed

Proceed to "Reverse Signal Circuit"

Multi-display assembly

When the shift position is in R, an image of the area behind the vehicle is displayed and then switches to another image

Proceed to "Reverse Signal Circuit"

Multi-display assembly

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"

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)

Steering angle setting (calibration)

Rear television camera assembly

Steering sensor

The estimated course lines stop moving before the steering wheel is fully turned to the right or left

Steering angle setting (calibration)

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

Correct the steering angle neutral point (initialization)

Steering angle setting (calibration)

Check that the rear television camera assembly is correctly installed

Back camera position setting (calibration)

Rear television camera assembly

Steering sensor

The guide lines are not displayed even though the back door is closed

Check that the No. 1 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table)

Rear television camera assembly

The guide lines remain displayed even though the back door is open

Check that the No. 1 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table)

Rear television camera assembly

"!" is displayed.

Correct the steering angle neutral point (initialization)

"!" mark remains displayed after the steering neutral point is corrected.

Steering angle setting (calibration)

Steering sensor

Rear television camera assembly

Guide lines and buttons are not displayed for all parking assist monitor screen display modes.

CAN communication system

Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT)

Rear television camera assembly

The guide lines and buttons remain displayed even though the back door is open.

CAN communication system

Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT)

Rear television camera assembly

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 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table)

Rear television camera assembly

"CHK" message(s) are displayed on the Signal Check screen.

Signal check (diagnosis system)

When the parking assist monitor screen is displayed, the lines are misaligned. (The image from the camera is tilted.)

Back camera position setting (calibration)

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 "Remote Touch Function" in Navigation System*1

Proceed to "Remote Touch Function" in Audio and Visual System (for 8 Inch Display)*2

Proceed to "Remote Touch Function" in Audio and Visual System (for 12.3 Inch Display)*3

Rear television camera assembly

Multi-display assembly

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 "Remote Touch Function" in Navigation System*1

Proceed to "Remote Touch Function" in Audio and Visual System (for 8 Inch Display)*2

Proceed to "Remote Touch Function" in Audio and Visual System (for 12.3 Inch Display)*3

Rear television camera assembly

Multi-display assembly

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

Multi-display assembly

The switches displayed on the parking assist monitor screen are grayed out.

Rear television camera assembly

Multi-display assembly

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 "Remote Touch Function" in Navigation System*1

Proceed to "Remote Touch Function" in Audio and Visual System (for 8 Inch Display)*2

Proceed to "Remote Touch Function" in Audio and Visual System (for 12.3 Inch Display)*3

Rear television camera assembly

Multi-display assembly

  • *1: w/ Navigation System
  • *2: w/ Audio and Visual System (for 8 Inch Display)
  • *3: w/ Audio and Visual System (for 12.3 Inch Display)
    Calibration
    CALIBRATION ADJUST PARKING ASSIST MONITOR SYSTEM (a) The parking assist monitor system can be adjusted using diagnostic mode. (b) If the following operations are performed, it is necessary to perform ...

    Terminals Of Ecu
    TERMINALS OF ECU REAR TELEVISION CAMERA ASSEMBLY (a) Disconnect the Z11 rear television camera assembly connector. (b) Measure the voltage on the wire harness side connector according to the value(s) ...

    Other materials:

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    Lexus RX (RX 350L, RX450h) 2016-2022 Owners Manual > Using the driving support systems: Lexus parking assist monitor
    The parking assist monitor assists the driver by displaying an image of the view behind the vehicle while backing up, for example while parking. The screen illustrations used in this text are intended as examples, and may differ from the image that is actually displayed on the screen. The re ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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