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 | Reference |
|---|---|---|
| Pre-collision system (all functions) does not operate | Power source circuit | Refer to Power Source Circuit |
| Buckle switch circuit | Refer to DTC B2074, B2075: Driver Side Seat Belt Buckle Switch Circuit Malfunction; Passenger Side Seat Belt Buckle Switch Circuit Malfunction | |
| Seat belt control ECU | Refer to REMOVAL | |
| System operates when the possibility of collision does not exist | Millimeter wave radar sensor detects objects other than obstacles | Refer to SYSTEM DESCRIPTION |
| Millimeter wave radar sensor | Refer to TERMINALS OF ECU | |
| Distance control ECU | Refer to TERMINALS OF ECU | |
| System does not operate when the possibility of collision exists | Millimeter wave radar sensor | Refer to TERMINALS OF ECU |
| Conditions required for system to operate are not met | Refer to SYSTEM DESCRIPTION | |
| Distance control ECU | Refer to TERMINALS OF ECU | |
| Neither normal system code nor DTC is output | Power source circuit | Refer to Power Source Circuit |
| 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 |