Problem Symptoms Table [06/2018 - 08/2020]
WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
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 | Proceed to "Clearance Warning ECU Power Source Circuit" | Refer to Clearance Warning ECU Power Source Circuit [06/2018 - 09/2022] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] | |
| Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| System cannot be turned off | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] |
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) [06/2018 - 09/2022] |
| 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) | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| 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) | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| 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) | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] |
BUZZER FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Sonar detection operation is normal but buzzer does not sound | 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 [06/2018 - 09/2022] | |
| Proceed to "No. 2 Clearance Warning Buzzer Circuit" | Refer to No. 2 Clearance Warning Buzzer Circuit [06/2018 - 09/2022] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] |
DISPLAY FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Combination meter assembly (LED): Perform Active Test (Indicat. Clearance Sonar LCD) | Refer to DATA LIST / ACTIVE TEST [06/2018 - 08/2021] | |
| Combination meter assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but all sonar displays do not appear on multi-information display and multi-display | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but sonar displays do not appear on multi-information display | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Combination meter assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but sonar displays do not appear on the full screen display (on the multi-display)*2 | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Rear Television Camera Assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| Mluti-display assembly | Refer to REMOVAL [06/2018 - 08/2020] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the multi-display)*1 | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Mluti-display assembly | Refer to REMOVAL [06/2018 - 08/2020] | |
| Parking assist ECU | Refer to REMOVAL [06/2018 - 09/2022] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the multi-display)*2 | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Proceed to "The Display of the Multi-display does not Switched" | Refer to The Display of the Multi-display does not Switched [06/2018 - 09/2022] | |
| Rear Television Camera Assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| Mluti-display assembly | Refer to REMOVAL [06/2018 - 08/2020] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the headup display)*3 | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Meter mirror sub-assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Clearance warning ECU assembly | Refer to REMOVAL [06/2018 - 08/2021] |
- *1: w/ Panoramic View Monitor System
- *2: w/o Panoramic View Monitor System
- *3: w/ Headup Display System
RCTA FUNCTION (W/ BLIND SPOT MONITOR SYSTEM)
| Symptom | Suspected Area | Link |
|---|---|---|
| Function does not operate at all (Blind spot monitor function operates normally) |
Data list / active test (Reverse) | Refer to DATA LIST / ACTIVE TEST [06/2018 - ] |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] | |
| Blind spot monitor sensor LH | Refer to REMOVAL [06/2018 - 08/2021] | |
| "CHECK RCTA SYSTEM" or "RCTA NOT AVAILABLE" is displayed on the multi-information display | Check abnormality history | Refer to DIAGNOSIS SYSTEM [06/2018 - ] |
| Blind spot monitor sensor LH | Refer to REMOVAL [06/2018 - 08/2021] | |
| Blind spot monitor sensor RH | Refer to REMOVAL [06/2018 - 08/2021] | |
| Combination meter assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| While RCTA function is active, outer rear view mirror indicator flashes but RCTA buzzer does not sound | Proceed to "Buzzer does not Sound" | Refer to Buzzer does not Sound [06/2018 - 09/2022] |
| When shift lever is in R, detection operation is normal but RCTA indicator does not appear on multi-display | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] |
| Blind spot monitor sensor RH | Refer to REMOVAL [06/2018 - 08/2021] | |
| Blind spot monitor sensor LH | Refer to REMOVAL [06/2018 - 08/2021] | |
| Mluti-display assembly | Refer to REMOVAL [06/2018 - 08/2021] | |
| Parking assist ECU *1 | Refer to REMOVAL [06/2018 - 09/2022] | |
| Rear television camera assembly*2 | Refer to REMOVAL [06/2018 - 09/2022] |
- *1: w/ Panoramic View Monitor System
- *2: w/o Panoramic View Monitor System
REAR CAMERA DETECTION FUNCTION (W/ PANORAMIC VIEW MONITOR SYSTEM)
| Symptom | Suspected Area | Link |
|---|---|---|
| When the multi-display screen is displayed, "RCD unavailable" is displayed | Correct the steering angle neutral point (Initialization) | Refer to CALIBRATION [06/2018 - 09/2022] |
| Blind spot monitor system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] | |
| Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| When the multi-display screen is displayed, "RCD malfunction. Visit your dealer" is displayed | Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] |
| When there is a pedestrian in the detection area, no pedestrian is detected | "Situations in which pedestrians cannot be detected normally." in precaution | Refer to PRECAUTION [06/2018 - 08/2021] |
| Perform calibration | Refer to CALIBRATION [06/2018 - 08/2021] | |
| Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| When there is no pedestrian in the detection area, a pedestrian is detected | "Situations in which pedestrians cannot be detected normally." in precaution | Refer to PRECAUTION [06/2018 - 08/2021] |
| Perform calibration | Refer to CALIBRATION [06/2018 - 08/2021] | |
| Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| A pedestrian who is in the absolute no detection area*3 is detected | Perform calibration | Refer to CALIBRATION [06/2018 - 08/2021] |
| Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] | |
| A pedestrian is only detected when they are in the absolute detection area*3 | Perform calibration | Refer to CALIBRATION [06/2018 - 08/2021] |
| Rear television camera assembly | Refer to REMOVAL [06/2018 - 09/2022] |
- *1: w/o Navigation System
- *2: w/ Navigation System
- *3: Refer to "Operation Explanation" in system description