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 | See page |
|---|---|---|
| System does not operate at all (self-check function does not operate) | Proceed to "Clearance Warning ECU Power Source Circuit" | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) | ||
| System cannot be turned off | Replace clearance warning ECU (for LHD) | |
| Replace clearance warning ECU (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Frozen indication is displayed in self-check function | Refer to Precaution | |
| Replace ultrasonic sensor in part where frozen indication is displayed | - | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) | ||
| 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 corner ultrasonic sensor) (for 8 Sensor Type) | Replace clearance warning ECU (for LHD) | |
| Replace clearance warning ECU (for RHD) | ||
| Combination meter assembly (shift indicator) 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 except P and R (front center ultrasonic sensor) (for 8 Sensor Type) | Replace clearance warning ECU (for LHD) | |
| Replace clearance warning ECU (for RHD) | ||
| 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) | Proceed to "Reverse Signal Circuit" | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) | ||
| Detection operation operates even when vehicle speed exceeds operation condition speed | Replace clearance warning ECU (for LHD) | |
| Replace clearance warning ECU (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Sonar detection operation is normal but buzzer operation is intermittent | Proceed to "Clearance Warning Buzzer Circuit" | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | Combination meter assembly (Active Test) | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) | ||
| Detection operation is normal but no sonar displays appear | Replace clearance warning ECU (for LHD) | |
| Replace clearance warning ECU (for RHD) | ||
| Detection operation is normal but sonar displays of multi-information display do not appear | Replace combination meter assembly | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) | ||
| Detection operation is normal but sonar displays of multi-display do not appear | Replace navigation receiver assembly (for Navigation Receiver Type) | |
| Replace radio and display receiver assembly (for Radio and Display Type) | ||
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Clearance sonar main switch does not operate | Proceed to "Main Switch Circuit" | |
| Replace clearance warning ECU (for LHD) | ||
| Replace clearance warning ECU (for RHD) |