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 |
|---|---|---|
| "CHECK PCS SYSTEM" is displayed | Combination meter | Refer to PROBLEM SYMPTOMS TABLE |
| Seat belt control ECU | Refer to REMOVAL | |
| Driving support ECU | Refer to REMOVAL | |
| "PCS TEMPORARILY NOT AVAILABLE" is displayed | System determines 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.) | Refer to SYSTEM DESCRIPTION |
| Overheating protection fail-safe of seat belt control ECU operates. If ECU temperature drops, normal control returns. | - | |
| Millimeter wave radar sensor | Refer to REMOVAL | |
| Seat belt control ECU | Refer to REMOVAL | |
| Driving support ECU | Refer to REMOVAL | |
| Although there is possibility of collision, pre-collision control (all front collision controls) do not operate ("PCS TEMPORARILY NOT AVAILABLE" is not displayed) | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | Refer to SYSTEM DESCRIPTION |
| Check installation condition of millimeter wave radar sensor | Refer to INSTALLATION | |
| Perform millimeter wave radar sensor adjustment | Refer to ADJUSTMENT | |
| Millimeter wave radar sensor | Refer to REMOVAL | |
| Driving support ECU | Refer to REMOVAL | |
| Although there is no possibility of collision, pre-collision control (all front collision controls) operates | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | Refer to SYSTEM DESCRIPTION |
| Check installation condition of millimeter wave radar sensor | Refer to INSTALLATION | |
| Perform millimeter wave radar sensor adjustment | Refer to ADJUSTMENT | |
| Millimeter wave radar sensor | Refer to REMOVAL | |
| Driving support ECU | Refer to REMOVAL | |
| Neither normal system code nor DTC is output | Power source circuit | Refer to Power Source Circuit |
| Seat belt control ECU | Refer to REMOVAL | |
| System does not operate normally even when normal system code is output and DTCs are not output | Power source circuit | Refer to Power Source Circuit |
| Seat belt control ECU | Refer to REMOVAL | |
| Only pre-collision seat belt does not operate | Buckle switch error (malfunction in which DTC is not output) | - |
| Seat belt control ECU | Refer to REMOVAL | |
| Only pre-collision brake does not operate | Pre-collision brake cancel switch | Refer to INSPECTION |
| Pre-collision brake cancel switch circuit | Refer to Pre-Collision Brake Cancel Switch Circuit | |
| Driving support ECU | Refer to REMOVAL |