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 |
|---|---|---|
| "Check PCS system" is displayed | Combination meter assembly | |
| Driving support ECU assembly | ||
| "PCS temporarily not available" is displayed | System determines millimeter wave radar sensor assembly cannot detect obstacles due to bad weather. If weather recovers, normal control returns. (Bad weather history can be checked using Data List.) | |
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| Although there is possibility of collision, pre-crash safety control (all front collision controls) does not operate ("PCS temporarily not available" is not displayed) | Vehicle condition/environment does not match pre-crash safety control operation conditions (Confirm control operation conditions) | |
| Pre-crash Safety System Circuit | ||
| Check installation condition of millimeter wave radar sensor assembly | ||
| Perform millimeter wave radar sensor assembly adjustment | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| Although there is no possibility of collision, pre-crash safety controls (all front crash controls) operate | Vehicle condition/environment does not match pre-crash safety control operation conditions (Confirm control operation conditions) | |
| Pre-crash Safety System Circuit | ||
| Check installation condition of millimeter wave radar sensor assembly | ||
| Perform millimeter wave radar sensor assembly adjustment | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| Neither normal system code nor DTCs are output | Power source circuit | |
| Driving support ECU assembly | ||
| System does not operate normally even when normal system code is output or DTCs are not output | Power source circuit | |
| Driving support ECU assembly | ||
| Pre-crash safety system does not operate | Pre-crash safety system cancel switch assembly | |
| Pre-crash safety system cancel switch circuit | ||
| Driving support ECU assembly | ||
| Pre-crash safety system cannot be canceled (PCS warning indicator does not illuminate) | Combination meter assembly (Check if indicator illuminates using Active Test) | |
| Pre-crash safety system cancel switch circuit | ||
| Driving support ECU assembly | ||
| Combination meter assembly | ||
| Pre-crash safety brake assist and pre-crash safety brake control cannot be canceled (PCS warning indicator does not illuminate) | Combination meter assembly (Check if indicator illuminates using Active Test) | |
| Combination switch assembly (VSC OFF switch) circuit | ||
| Driving support ECU assembly | ||
| Combination meter assembly |