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.
The pre-crash safety system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.
| Symptom | Suspected Area | See page |
|---|---|---|
| "Pre-Crash Safety Unavailable" is displayed | Perform millimeter wave radar sensor assembly adjustment | |
| Millimeter wave radar sensor assembly temperature malfunction | ||
| Millimeter wave radar sensor assembly low voltage malfunction | ||
| Millimeter wave radar sensor assembly | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| "Pre-crash System Unavailable Clean Sensor" is displayed | Foreign matter attached to millimeter wave radar sensor assembly | - |
| Millimeter wave radar sensor assembly | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| "Forward Camera Systems Unavailable" is displayed | Forward recognition camera | |
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| "Forward Camera Systems Unavailable Clean Windshield" is displayed | The forward recognition camera or windshield glass within the field of view of the forward recognition camera is dirty or fogged up | - |
| Forward recognition camera | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Although there is possibility of collision, pre-crash safety controls (all controls) do not operate ("Pre-crash Safety System Unavailable" is not displayed) | Check if pre-crash safety system is canceled | - |
| Vehicle condition/environment does not match the pre-crash safety system operation conditions (Confirm control operation conditions). | ||
| Check installation condition of millimeter wave radar sensor assembly | ||
| Perform millimeter wave radar sensor assembly adjustment | ||
| Millimeter wave radar sensor assembly | ||
| Check installation condition of forward recognition camera | ||
| Perform forward recognition camera adjustment | ||
| Forward recognition camera | ||
| Driving support ECU assembly | ||
| Although there is no possibility of collision, pre-crash safety controls (all controls) operate | Vehicle condition/environment does not match the pre-crash safety system operation conditions (Confirm control operation conditions). | |
| Check installation condition of millimeter wave radar sensor assembly | ||
| Perform millimeter wave radar sensor assembly adjustment | ||
| Millimeter wave radar sensor assembly | ||
| Check installation condition of forward recognition camera | ||
| Perform forward recognition camera adjustment | ||
| Forward recognition camera | ||
| Driving support ECU assembly | ||
| Pre-crash safety system does not operate | Check if pre-crash safety system is canceled | - |
| ECU power source circuit | ||
| Driving support ECU assembly | ||
| Pre-crash safety system cannot be canceled (PCS warning light does not illuminate) | Combination meter assembly (check if indicator illuminates using Active Test) | |
| Driving support ECU assembly | ||
| Combination meter assembly |