Tech Tips
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 open circuit indication is displayed during the self-check function, check for DTCs and troubleshoot according to each inspection procedure.
| Symptom | Suspected Area | Link |
|---|---|---|
| System does not operate at all (self-check function does not operate) | Proceed to "Clearance Warning ECU Power Source Circuit" | Click here |
| CAN communication system (for RHD) | ||
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here | |
| System cannot be turned off | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here |
| Symptom | Suspected Area | Link |
|---|---|---|
| Combination meter assembly (shift indicator) operates normally, but detection operates when shift lever is in P, or detection does not operate when shift lever is in any position except P (front ultrasonic sensor) | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here | |
| Combination meter assembly (shift indicator) operates normally, but detection operates when shift lever is in any position except R, or does not operate with the shift lever in R (rear ultrasonic sensor) | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here | |
| Detection operation operates even when vehicle speed exceeds operation condition speed | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here |
| Symptom | Suspected Area | Link |
|---|---|---|
| Sonar detection operation is normal but buzzer operation is intermittent | Check that the temporarily mute function is not in operation | - |
| Proceed to "Clearance Warning Buzzer Circuit" | Click here | |
| Clearance warning ECU assembly | Click here |
| Symptom | Suspected Area | Link |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | Combination meter assembly | Click here |
| Detection operation is normal but no sonar displays appear | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here | |
| Detection operation is normal but sonar displays of multi-information display do not appear | Combination meter assembly | Click here |
| CAN communication system (for RHD) | ||
| CAN communication system (for LHD) | ||
| Clearance warning ECU assembly | Click here | |
| Detection operation is normal but sonar displays of multi-display do not appear | CAN communication system (for RHD) | |
| CAN communication system (for LHD) | ||
| Radio and display receiver assembly | ||
| Clearance warning ECU assembly | Click here |