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.
| 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" | |
| Proceed to "Clearance Sonar Main Switch Circuit" | ||
| Clearance warning ECU assembly | ||
| ECU does not operate when clearance sonar main switch is turned on or off | Proceed to "Clearance Sonar Main Switch Circuit" | |
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Combination meter assembly (shift position indicator) 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 (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Combination meter assembly (shift position indicator) 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 (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| 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 (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Sensor detection operation is normal but buzzer operation is intermittent | Check that the temporary mute function is not operating | - |
| Proceed to "Clearance Warning Buzzer Circuit" | ||
| Clearance warning ECU assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Detection operation is normal but clearance sensor indicator does not illuminate. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly (LED): Perform Active Test (Indicat. LEXUS Parking Assist-sensor LCD) | ||
| Combination meter assembly | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but all sensor displays do not appear on multi-information display and multi-display. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but clearance sonar main switch indicator does not illuminate | Proceed to "Clearance Sonar Main Switch Circuit" | |
| Clearance warning ECU assembly | ||
| Detection operation is normal but sensor displays do not appear on multi-information display. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Meter / gauge system | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but open circuit indication displays on accessory meter assembly. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Navigation system (w/ Navigation System) | ||
| Audio and visual system (w/o Navigation System) | ||
| Clearance warning ECU assembly | ||
| Detection operation is normal but open circuit indication displays on mirror meter sub-assembly. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Headup display system | ||
| Clearance warning ECU assembly |