Problem Symptoms Table
HINT:
- 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.
PRE-COLLISION SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| All functions of pre-collision system do not operate | Power source circuit | Refer to Power Source Circuit |
| Seat belt control ECU | Refer to TERMINALS OF ECU | |
| Front seat inner belt LH assembly | - | |
| Front seat inner belt RH assembly | - | |
| Buckle switch error (malfunction in which DTC is not output) | - | |
| "Check PCS System" is displayed | Seat belt control ECU | Refer to TERMINALS OF ECU |
| Distance control ECU | Refer to TERMINALS OF ECU | |
| "PCS Not available now" is displayed | System determines obstacles cannot be detected due to the millimeter wave radar sensor or the radiator grille being dirty. If the dirt is removed, normal control returns (dirt history can be checked using Data List). | - |
| System determines the millimeter wave radar sensor cannot detect obstacles due to bad weather. If weather recovers, normal control returns (bad weather history can be checked using Data List). | - | |
| Overheating protection fail-safe of the seat belt control ECU operates. If the ECU temperature drops, normal control returns. | - | |
| Millimeter wave radar sensor | Refer to TERMINALS OF ECU | |
| Seat belt control ECU | Refer to TERMINALS OF ECU | |
| Distance control ECU | Refer to TERMINALS OF ECU | |
| Although there is a possibility of collision, pre-collision control (all front collision controls) does not operate ("PCS Not available now" is not displayed) | Vehicle condition/environment does not match the pre-collision control operation conditions (confirm control operation conditions). | - |
| Check the installation condition of the millimeter wave radar sensor. | Refer to INSTALLATION | |
| Perform the millimeter wave radar sensor adjustment. | Refer to ADJUSTMENT | |
| Millimeter wave radar sensor | Refer to TERMINALS OF ECU | |
| Distance control ECU | Refer to TERMINALS OF ECU | |
| Only pre-collision seat belt does not operate | Buckle switch error (malfunction in which DTC is not output) | - |
| Seat belt control ECU | Refer to TERMINALS OF ECU | |
| Pre-collision brake cannot be canceled (pre-collision warning indicator does not blink) | Combination meter (check if the indicator blinks using Active Test) | - |
| Distance control ECU | Refer to TERMINALS OF ECU |