Problem Symptoms Table [08/2021 - ]
WARNING: This page is about a different car, the 2024 Toyota 4Runner, 2023 Toyota 4Runner, and 2022 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The following inspection procedure of the multi-terrain monitor system is described on the assumption that the navigation system*1 or audio and visual system*2 is normal. If navigation system*1 or audio and visual system*2 has any malfunction, first proceed with troubleshooting of the navigation system*1 or audio and visual system*2.
- *1: w/ Navigation System
- *2: w/o Navigation System
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 the 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.
GENERAL
| Symptom | Suspected Area | See |
|---|---|---|
| Screen does not switch when the pattern select switch (panoramic view monitor switch) is pressed. | Proceed to "ECU Power Source Circuit" | Refer to ECU Power Source Circuit [08/2021 - ] |
| Diagnostic mode - Signal connection check (CAMERA SW check) | Refer to DIAGNOSIS SYSTEM [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Does not switch to the panoramic view and rear view screen, wide rear view screen, or narrow rear view screen when the shift lever is in R. | Diagnostic mode - Signal connection check (SHIFT check) | Refer to DIAGNOSIS SYSTEM [08/2021 - ] |
| Proceed to "Reverse Signal Circuit" | Refer to Reverse Signal Circuit [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Radio and display receiver assembly | Refer to REMOVAL [08/2019 - ] | |
| Image not displayed on the panoramic view and rear view screen, wide rear view screen or narrow rear view screen when the shift lever is in R. | Proceed to "Image from Camera for Multi-terrain Monitor is Abnormal" | Refer to Image from Camera for Panoramic View Monitor is Abnormal [08/2021 - ] |
| Display does not switch to the panoramic view and wide front view screen or the two-side view screen when the multi-terrain monitor main switch is pressed. | Refer to "Multi-terrain Monitor Screen Description" in system description | Refer to SYSTEM DESCRIPTION [08/2021 - ] |
| Diagnostic mode - Signal connection check (CAN check) | Refer to DIAGNOSIS SYSTEM [08/2021 - ] | |
| Diagnostic mode - Signal connection check (CAMERA SW check) | Refer to DIAGNOSIS SYSTEM [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Image not displayed on the panoramic view and wide front view screen or the two-side view screen when the multi-terrain monitor main switch is pressed. | Proceed to "Image from Camera for Multi-terrain Monitor is Abnormal" | Refer to Image from Camera for Panoramic View Monitor is Abnormal [08/2021 - ] |
DISPLAY MALFUNCTION
| Symptom | Suspected Area | See |
|---|---|---|
| Objects not displayed correctly on the multi-terrain monitor screen (color, distorted image). | Proceed to "Image from Camera for Multi-terrain Monitor is Abnormal" | Refer to Image from Camera for Panoramic View Monitor is Abnormal [08/2021 - ] |
| Distorted display on multi-terrain monitor screen. | Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Parking lines do not match at front and rear on multi-terrain monitor screen. | Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Partial black screen on multi-terrain monitor screen. | Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] |
| Proceed to "Image from Camera for Multi-terrain Monitor is Abnormal" | Refer to Image from Camera for Panoramic View Monitor is Abnormal [08/2021 - ] | |
| Area displayed differs from the actual area. | Ensure no door is opened | - |
| Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] |
SWITCH FUNCTION
| Symptom | Suspected Area | See |
|---|---|---|
| Pattern select switch (panoramic view monitor switch) night illumination does not illuminate. | Pattern select switch (panoramic view monitor switch) | Refer to INSPECTION [08/2021 - ] |
| Harness or connector | - | |
| Touch panel switch does not function. | Diagnostic mode - "Check Touch Switch"*1 | Refer to OPERATION CHECK [08/2019 - ] |
| Diagnostic mode - "Check Touch Switch"*2 | Refer to OPERATION CHECK [08/2019 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Radio and display receiver assembly | Refer to REMOVAL [08/2019 - ] |
- *1: w/ Navigation System
- *2: w/o Navigation System
PANORAMIC VIEW MONITOR SYSTEM FUNCTION
| Symptom | Suspected Area | See |
|---|---|---|
| When the vehicle speed increases in the automatic display mode, the panoramic view and wide front view screen or the two-side view screen remains displayed, without switching to the navigation screen or audio screen. | Parking assist ECU | Refer to REMOVAL [08/2021 - ] |
| The screen display timer function does not operate if the manual display mode is selected. | Refer to "Multi-terrain Monitor Screen Description" in system description | Refer to SYSTEM DESCRIPTION [08/2021 - ] |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| The estimated course lines do not match the vehicle width extension lines when the steering wheel points straight ahead. | Check the steering wheel installation angle | Refer to INSTALLATION [08/2015 - 08/2022] , or refer to INSTALLATION [08/2022 - ] |
| Adjust steering angle | Refer to CALIBRATION [08/2021 - ] | |
| Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Estimated course lines stop moving before the steering wheel is turned fully left. | Steering angle setting (calibrate stored maximum steering angle) | Refer to CALIBRATION [08/2021 - ] |
| Estimated course lines are not displayed. | Check the multi-terrain monitor screen display mode settings (Check if the estimated course lines display is set to off) | Refer to SYSTEM DESCRIPTION [08/2021 - ] |
| Adjust steering angle | Refer to CALIBRATION [08/2021 - ] | |
| Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] | |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| Guide lines and buttons are not displayed on the panoramic view and rear view screen or wide rear view screen display screen. | Check if the luggage compartment light turns on and off normally (If not, refer to Lighting System (EXT) - Problem Symptoms Table) | Refer to PROBLEM SYMPTOMS TABLE [08/2020 - 08/2022] , or refer to PROBLEM SYMPTOMS TABLE [08/2022 - ] |
| Parking assist ECU | Refer to REMOVAL [08/2021 - ] | |
| "CHK" is displayed for an item on the Vehicle Signal Check screen. | Diagnostic mode - Signal connection check | Refer to DIAGNOSIS SYSTEM [08/2021 - ] |
| Blind spots in image. | Ensure no door is opened | - |
| Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] | |
| Camera boundary lines are poorly connected. | Check the vehicle height normal status | - |
| Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] | |
| Estimated course lines are displaced. | Camera view adjustment (calibration) | Refer to CALIBRATION [08/2021 - ] |
| Adjust steering angle | Refer to CALIBRATION [08/2021 - ] |