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.
When an open circuit indication is displayed by the self-check function, check for DTCs and troubleshoot according to each inspection procedure.
| Symptom | Suspected Area | See page |
|---|---|---|
| System does not operate at all. | Proceed to "Clearance Warning ECU Power Source Circuit" | |
| Proceed to "Clearance Sonar Main Switch Circuit" | ||
| Clearance warning ECU assembly | ||
| System cannot be turned off. | Proceed to "Clearance Sonar Main Switch Circuit" | |
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Frozen indication is displayed in self-check function. | Proceed to "PRECAUTION" | |
| Replace No. 1 ultrasonic sensor in part where frozen indication is displayed | - | |
| Clearance warning ECU assembly | ||
| Combination meter assembly (shift selection display) 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 corner sonar). | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Combination meter assembly (shift selection display) operates normally, but detection operates when shift lever is in P or R, or detection does not operate when shift lever is in any position other than P or R (front center sonar). | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Combination meter assembly (shift selection display) operates normally, but detection operates when shift lever is in any position other than R, or detection does not operate when shift lever is in R (rear sonar). | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Detection operates even when vehicle speed exceeds the operation condition speed. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| 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" | ||
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly (LED): Perform Active Test (Indicat. Clearance Sonar LCD) | ||
| Clearance warning ECU assembly | ||
| Combination meter assembly | ||
| Detection operation is normal but all sonar displays do not appear | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but sonar displays of multi-information display do not appear | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but sonar displays of multi-display do not appear | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Multi-display (for 8 Inch) | ||
| Multi-media module receiver assembly | ||
| Clearance warning ECU assembly |