Problem Symptoms Table [11/2023 - ]
WARNING: This page is about a different car, the 2025 Toyota Highlander and 2024 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- 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 [11/2023 - ]
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
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.
- When an open circuit or frozen indication is displayed by the self-check function, check for DTCs and troubleshoot according to each inspection procedure.
GENERAL
| Symptom | Suspected Area | Link |
|---|---|---|
| System does not operate at all | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Check that the Meter / gauge system is operating normally*5 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] | |
| Check that the Meter / gauge system is operating normally*6 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] | |
| Proceed to "Clearance Warning ECU Power Source Circuit" | Refer to Clearance Warning ECU Power Source Circuit [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| System cannot be turned off | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Check that the Meter / gauge system is operating normally*5 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] | |
| Check that the Meter / gauge system is operating normally*6 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] | |
| Steering pad switch assembly | Refer to INSPECTION [12/2019 - ] | |
| Spiral cable sub-assembly | Refer to INSPECTION [12/2019 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] |
SONAR FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Frozen indication is displayed in self-check function | Proceed to "Sensor Frozen Indication (Dirty or Frozen)" | Refer to Sensor Frozen Indication (Dirty or Frozen) [11/2023 - ] |
| "Parking Assist Malfunction Visit Your Dealer" is displayed | Calibration | Refer to CALIBRATION [11/2023 - ] |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Combination meter assembly (shift selection) operates normally, but detection operates when shift lever is in P, or detection does not operate when shift lever is in any position other than P (front sonar) | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Combination meter assembly (shift selection) operates normally, but detection operates when shift lever is not in R, or does not operate with shift lever in R (rear sonar) | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Combination meter assembly (speedometer) operates normally, but detection does not operate when vehicle speed meets operation condition, or detection operates when vehicle speed does not meet operation condition (front sonar) | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] |
BUZZER FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Sonar detection operation 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 [11/2023 - ] | |
| Proceed to "No. 2 Clearance Warning Buzzer Circuit" | Refer to No. 2 Clearance Warning Buzzer Circuit [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] |
DISPLAY FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Combination meter assembly: Perform Active Test (Indicat. Clearance Sonar LCD)*5 | Refer to DATA LIST / ACTIVE TEST [11/2023 - ] | |
| Combination meter assembly: Perform Active Test (Multi Display All (White))*6 | Refer to DATA LIST / ACTIVE TEST [11/2023 - ] | |
| Combination meter assembly | Refer to REMOVAL [12/2019 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Detection operation is normal but all displays do not appear | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Detection operation is normal but sonar displays do not appear on the multi-information display | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Combination meter assembly | Refer to REMOVAL [12/2019 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] | |
| Detection operation is normal but sonar displays do not appear on the radio and display receiver assembly | Check that the CAN communication system is operating normally*1 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] |
| Check that the CAN communication system is operating normally*2 | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] | |
| Radio and display receiver assembly | Refer to REMOVAL [11/2023 - ] | |
| Rear television camera assembly*3 | Refer to REMOVAL [11/2023 - ] | |
| Parking assist ECU*4 | Refer to REMOVAL [11/2023 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [11/2023 - ] |
- *1: for HV Model
- *2: for Gasoline Model
- *3: w/ Parking Assist Monitor System
- *4: w/ Panoramic View Monitor System
- *5: except 12.3 Inch Display
- *6: for 12.3 Inch Display