Note
When replacing the combination meter assembly, make sure to replace it with a new one.
When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Inspect the fuses for circuits related to this system before performing the following procedure.
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| "Pre-crash Safety Malfunction Visit Your Dealer" is displayed | Driving support ECU assembly(for LHD) | |
| Driving support ECU assembly(for RHD) | ||
| Combination meter assembly | ||
| "Pre-crash Safety Unavailable" is displayed | System determines that obstacles cannot be detected due to millimeter wave radar sensor assembly or radiator grille being dirty. If dirt is removed, normal control returns (dirt history can be checked using Data List). | - |
| System determines that 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(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Although there is possibility of collision, pre-crash safety control (all front collision controls) does not operate ("Pre-crash Safety Unavailable" 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(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Although there is no possibility of collision, pre-crash safety controls (all front crash controls) operate | Vehicle condition/environment 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 | ||
| Driving support ECU assembly(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Perform millimeter wave radar sensor assembly adjustment | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Pre-crash safety system cannot be canceled (PCS warning indicator does not illuminate) | Check condition of No. 2 combination switch assembly (pre-crash system cancel switch assembly) | |
| Combination meter assembly (Check if indicator illuminates using Active Test) | ||
| pre-crash system cancel switch assembly circuit | ||
| Driving support ECU assembly(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Pre-crash brake assist and pre-crash brake control cannot be canceled (PCS warning indicator does not illuminate) | Check condition of integration control and panel assembly (VSC OFF switch) | |
| Combination meter assembly (Check if indicator illuminates using Active Test) | ||
| Electronically controlled brake system | ||
| Driving support ECU assembly(for LHD) | ||
| Driving support ECU assembly(for RHD) | ||
| Pre-crash safety system sensitivity cannot be changed (multi-information display sensitivity setting screen does not display) | Check condition of No. 2 combination switch assembly (pre-crash system cancel switch assembly) | |
| Pre-crash system cancel switch assembly circuit | ||
| Combination meter assembly | ||
| Driving support ECU assembly(for LHD) | ||
| Driving support ECU assembly(for RHD) |