PRE-COLLISION SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| "Check Pre-Collision System" is displayed | Combination meter assembly | |
| Driving support ECU assembly | ||
| "Pre-Collision System Temporarily not Available" is displayed | System determines the millimeter wave radar sensor assembly cannot detect obstacles due to dirt on the millimeter wave radar sensor assembly or radiator grille. If dirt is removed, normal control returns. (Millimeter wave radar sensor assembly dirt history can be checked using Data List) | |
| 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 | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Although there is possibility of collision, pre-collision control (all front collision controls) does not operate ("Pre-Collision System Temporarily not Available" is not displayed) | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | |
| Pre-collision 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-collision controls (all front crash controls) operate | Vehicle condition/environment does not match pre-collision control operation conditions (Confirm control operation conditions) | |
| Pre-collision 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 | ||
| Pre-collision system cannot be canceled (PCS warning light does not illuminate) | Combination meter assembly (Check if indicator illuminates using Active Test) | |
| Pre-collision system cancel switch circuit | ||
| Driving support ECU assembly | ||
| Pre-collision brake assist and pre-collision brake control cannot be canceled (PCS warning indicator does not illuminate) | Combination meter assembly (Check if indicator illuminates using Active Test) | |
| VSC OFF switch circuit | ||
| Driving support ECU assembly | ||
| Pre-collision sensitivity switching function cannot be operated (Pre-collision system sensitivity indicator is not displayed) | Pre-collision system cancel switch circuit | |
| Pre-collision System Circuit | ||
| Combination meter assembly | ||
| Driving support ECU assembly |