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.
| Symptom | Suspected Area | Link |
|---|---|---|
| System does not operate at all | TOYOTA parking assist-sensor system | |
| CAN communication system | ||
| Clearance warning ECU assembly | ||
| System cannot be turned off | CAN communication system | |
| Clearance warning ECU assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| Detection function operates when the operating conditions are not met | Hybrid control system | |
| Clearance warning ECU assembly | ||
| Detection function operates when vehicle is not within the required speed range (speedometer not malfunctioning) | Clearance warning ECU assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| Intelligent clearance sonar system 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 | ||
| Meter circuit plate |
| Symptom | Suspected Area | Link |
|---|---|---|
| While the ICS system is operating, no ICS notifications are displayed on the multi-information display. | Clearance warning ECU assembly | |
| Meter circuit plate | ||
| While the ICS system is operating, no ICS notifications are displayed on the headup display.* | Clearance warning ECU assembly | |
| Combination meter mirror ECU | ||
| "ICS Malfunction Visit Your Dealer" is displayed | Meter circuit plate | |
| Clearance warning ECU assembly | ||
| "ICS Unavailable" is displayed | Check that no foreign matter is attached to the ultrasonic sensors. | - |
| Steering angle neutral point (Intelligent clearance soner system registration) | ||
| CAN communication system | ||
| Meter circuit plate | ||
| Clearance warning ECU assembly | ||
| ICS does not operate when there is a possibility of a collision (Warning message "ICS Unavailable" not displayed) | Check the installation of the ultrasonic sensors (front) | |
| Check the installation of the ultrasonic sensors (rear) | ||
| Adjust the installation of the ultrasonic sensors as necessary. | ||
| Ultrasonic sensors (front) | ||
| Ultrasonic sensors (rear) | ||
| Clearance warning ECU assembly | ||
| ICS control operates when there is no possibility of a collision | Check the installation of the ultrasonic sensors (front) | |
| Check the installation of the ultrasonic sensors (rear) | ||
| Adjust the installation of the ultrasonic sensors as necessary. | ||
| Ultrasonic sensors (front) | ||
| Ultrasonic sensors (rear) | ||
| Clearance warning ECU assembly | ||
| ICS control cannot be turned off (ICS OFF indicator does not illuminate) | Meter circuit plate (LED): Perform Active Test (Indicat. ICS OFF LCD) | |
| Steering pad switch assembly | ||
| Clearance warning ECU assembly | ||
| ICS OFF indicator blinks | Check that no foreign matter is attached to the ultrasonic sensors. | - |
| Steering angle neutral point (Intelligent clearance soner system registration) |
*: w/ Headup Display System