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.
Note
When replacing parts, make sure to check the replacement precautions Click here.
| Symptom | Suspected Area | See page |
|---|---|---|
| The dynamic radar cruise control system cannot be turned on using the cruise control main switch (ON/OFF) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Cruise control switch circuit | ||
| Cruise main indicator light circuit | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| The cruise control mode cannot be changed between vehicle-to-vehicle distance control mode and constant speed control mode | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| The vehicle-to-vehicle distance cannot be changed | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Distance control switch circuit | ||
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| Vehicle speed setting cannot be performed (in constant speed control mode) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| for 1UR-FE: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV: Automatic transmission system (for AB60F ) | ||
| for 1VD-FTV with DPF: Automatic transmission system (for AB60F) | ||
| Automatic transmission system (for AE80F) | ||
| Vehicle stability control system | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| VSC OFF switch (integration control and panel assembly) | ||
| Driving support ECU assembly | ||
| Vehicle speed setting cannot be performed (in vehicle-to-vehicle distance control mode) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Millimeter wave radar sensor is dirty | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | ||
| Cruise control switch circuit | ||
| for 1UR-FE: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV: automatic transmission system (for AB60F) | ||
| for 1VD-FTV with DPF: Automatic transmission system (for AB60F) | ||
| Automatic transmission system (for AE80F) | ||
| Millimeter wave radar sensor assembly | ||
| Forward recognition camera | ||
| Vehicle stability control system | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| VSC OFF switch (integration control and panel assembly) | ||
| Driving support ECU assembly | ||
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in constant speed control mode) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| for 1UR-FE: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV with DPF: Automatic transmission system (for AB60F) | ||
| Automatic transmission system (for AE80F) | ||
| Vehicle stability control system | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| VSC OFF switch (integration control and panel assembly) | ||
| Driving support ECU assembly | ||
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in vehicle-to-vehicle distance control mode) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Millimeter wave radar sensor is dirty | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | ||
| Cruise control switch circuit | ||
| for 1UR-FE: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV with DPF: Automatic transmission system (for AB60F) | ||
| Automatic transmission system (for AE80F) | ||
| Millimeter wave radar sensor assembly | ||
| Forward recognition camera | ||
| Vehicle stability control system | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| VSC OFF switch (integration control and panel assembly) | ||
| Driving support ECU assembly | ||
| Hunting/vehicle speed is not constant (in constant speed control mode) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Vehicle stability control system | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| 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 (for LHD) | ||
| CAN communication system (for RHD) | ||
| Vehicle stability control system | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Driving support ECU assembly | ||
| Pulling the cruise control main switch to CANCEL does not cancel control of vehicle speed by the dynamic radar cruise control system | Cruise control switch circuit | |
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Moving the shift lever does not cancel control of vehicle speed by the dynamic radar cruise control system | Park/neutral position switch assembly (for AB60F) | |
| Park/neutral position switch assembly (for AE80F) | ||
| Shift lock control unit assembly (for AB60F) | ||
| Shift lock control unit assembly (for AE80F) | ||
| for 1UR-FE: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV: Automatic transmission system (for AB60F) | ||
| for 1VD-FTV with DPF: Automatic transmission system (for AB60F) | ||
| Automatic transmission system (for AE80F) | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Depressing the brake pedal does not cancel control of vehicle speed by the dynamic radar cruise control system | Stop light switch circuit | |
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| 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 | Pre-collision city 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 | ||
| Even though the vehicle approach warning buzzer is sounding, brake control is not performed when decelerating | Vehicle stability control system | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Driving support ECU assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Even though the SET function is operating, the cruise control SET indicator does not illuminate | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Cruise control SET indicator light circuit | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| The cruise control indicator remains illuminated | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Indicators are not illuminated on the multi-information display in the combination meter assembly | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| The buzzer does not sound when control of vehicle speed by the dynamic radar cruise control is canceled | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) |