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 | See page |
|---|---|---|
| The dynamic radar cruise control system cannot be turned on using the cruise control switch (ON/OFF button) | CAN communication system | |
| Cruise control switch circuit | ||
| Cruise main indicator light circuit | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| The cruise control mode cannot be changed between vehicle-to-vehicle distance control mode and constant speed control mode | CAN communication system | |
| Cruise control switch circuit | ||
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly | ||
| The vehicle-to-vehicle distance cannot be changed | CAN communication system | |
| Distance control switch circuit | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Vehicle speed setting cannot be performed (in constant speed control mode) | VSC is turned off | - |
| CAN communication system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Hybrid control system | ||
| Electronically controlled brake system | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Vehicle speed setting cannot be performed (in vehicle-to-vehicle distance control mode) | VSC is turned off | - |
| The forward recognition camera is temporarily unavailable | - | |
| Millimeter wave radar sensor is dirty | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | ||
| CAN communication system | ||
| Cruise control switch circuit | ||
| Hybrid control system | ||
| Millimeter wave radar sensor assembly | ||
| Forward recognition camera | ||
| Electronically controlled brake system | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in constant speed control mode) | VSC is turned off | - |
| CAN communication system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Hybrid control system | ||
| Electronically controlled brake system | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in vehicle-to-vehicle distance control mode) | VSC is turned off | - |
| Millimeter wave radar sensor is dirty | - | |
| The forward recognition camera is temporarily unavailable | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | ||
| CAN communication system | ||
| Cruise control switch circuit | ||
| Hybrid control system | ||
| Millimeter wave radar sensor assembly | ||
| Forward recognition camera | ||
| Electronically controlled brake system | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Hunting/vehicle speed is not constant (in constant speed control mode) | CAN communication system | |
| Electronically controlled brake system | ||
| Hybrid vehicle control ECU assembly | ||
| Hunting/vehicle speed is not constant (in vehicle-to-vehicle distance control mode) | Millimeter wave radar sensor is dirty | - |
| Millimeter wave radar sensor assembly beam axis not adjusted | ||
| CAN communication system | ||
| Electronically controlled brake system | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Pulling the cruise control switch to CANCEL does not cancel control of vehicle speed by the dynamic radar cruise control system | Cruise control switch circuit | |
| Hybrid vehicle control ECU assembly | ||
| Moving the shift lever does not cancel control of vehicle speed by the dynamic radar cruise control system | Shift lever position sensor | |
| Lower shift lever assembly | ||
| Hybrid control system | ||
| Hybrid vehicle control ECU assembly | ||
| Depressing the brake pedal does not cancel control of vehicle speed by the dynamic radar cruise control system | Stop light switch circuit | |
| Hybrid vehicle control ECU assembly | ||
| Even though the millimeter wave radar sensor is not dirty, the warning message "Clean Sensor" is displayed | Millimeter wave radar sensor assembly | |
| The vehicle approach warning buzzer does not sound | Skid control buzzer circuit | |
| Check installation of millimeter wave radar sensor | ||
| Check installation of forward recognition camera | ||
| Forward recognition camera | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Even though the vehicle approach warning buzzer is sounding, brake control is not performed when decelerating | Electronically controlled brake system | |
| CAN communication system | ||
| Driving support ECU assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Even though the SET function is operating, the cruise control SET indicator does not illuminate | CAN communication system | |
| Cruise control SET indicator light circuit | ||
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly | ||
| The cruise control indicator remains illuminated | CAN communication system | |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly | ||
| Indicators are not illuminated on the multi-information display in the combination meter assembly | CAN communication system | |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly | ||
| The buzzer does not sound when control of vehicle speed by the dynamic radar cruise control is canceled | CAN communication system | |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly |