Problem Symptoms Table [01/2017 - 05/2023]
NOTE:
- 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.
Refer to ADJUSTMENT [01/2017 - 05/2023]
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
- If the forward recognition camera has been replaced with a new one, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.
HINT:
- 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.
DYNAMIC RADAR CRUISE CONTROL SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| The dynamic radar cruise control system cannot be turned on using the cruise control main switch | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Cruise main indicator light circuit | Refer to Cruise Main Indicator Light Circuit [01/2017 - 05/2023] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| The dynamic radar cruise control mode cannot be changed between vehicle-to-vehicle distance control mode and constant speed control mode | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| The vehicle-to-vehicle distance cannot be changed | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Distance control switch circuit | Refer to Distance Control Switch Circuit [01/2017 - 05/2023] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Vehicle speed setting cannot be performed (in constant speed control mode) | Fail-safe chart | Refer to FAIL-SAFE CHART [01/2017 - 05/2023] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Stop light switch circuit | Refer to DTC P0571-62: Brake Switch "A" Signal Compare Failure [01/2017 - 05/2023] | |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Vehicle speed setting cannot be performed (in vehicle-to-vehicle distance control mode) | Millimeter wave radar sensor assembly front radar incorrect axis gap (vertical) history* | Refer to DATA LIST / ACTIVE TEST [01/2017 - 05/2023] |
| Fail-safe chart | Refer to FAIL-SAFE CHART [01/2017 - 05/2023] | |
| Forward recognition camera is temporarily unavailable | Refer to FAIL-SAFE CHART [01/2017 - 05/2023] | |
| Millimeter wave radar sensor is dirty | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | Refer to ADJUSTMENT [01/2017 - 05/2023] | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Forward recognition camera | Refer to REMOVAL [01/2017 - 05/2023] | |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in constant speed control mode) | Fail-safe chart | Refer to FAIL-SAFE CHART [01/2017 - 05/2023] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Stop light switch circuit | Refer to DTC P0571-62: Brake Switch "A" Signal Compare Failure [01/2017 - 05/2023] | |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Control of vehicle speed by the dynamic radar cruise control system is canceled (in vehicle-to-vehicle distance control mode) | Fail-safe chart | Refer to FAIL-SAFE CHART [01/2017 - 05/2023] |
| Forward recognition camera is temporarily unavailable | - | |
| Millimeter wave radar sensor is dirty | - | |
| Millimeter wave radar sensor assembly beam axis not adjusted | Refer to ADJUSTMENT [01/2017 - 05/2023] | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] | |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Forward recognition camera | Refer to REMOVAL [01/2017 - 05/2023] | |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hunting/vehicle speed is not constant (in constant speed control mode) | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hunting/vehicle speed is not constant (in vehicle-to-vehicle distance control mode) | Millimeter wave radar sensor assembly is dirty | - |
| Millimeter wave radar sensor assembly beam axis not adjusted | Refer to ADJUSTMENT [01/2017 - 05/2023] | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Vehicle speed control by the dynamic radar cruise control system is not canceled when CANCEL switch is pushed | Steering pad switch circuit | Refer to Steering Pad Switch Circuit [01/2017 - 05/2023] |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Moving the shift lever does not cancel control of vehicle speed by the dynamic radar cruise control system | Electronic shift lever system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] |
| Transmission floor shift assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Depressing the brake pedal does not cancel control of vehicle speed by the dynamic radar cruise control system | Stop light switch circuit | Refer to DTC P0571-62: Brake Switch "A" Signal Compare Failure [01/2017 - 05/2023] |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Control cannot be canceled while the vehicle is stopped. | Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Door courtesy switch circuit | Refer to Door Courtesy Switch Circuit [01/2017 - ] | |
| Luggage compartment door courtesy switch circuit | Refer to Luggage Compartment Door Courtesy Switch Circuit [01/2017 - 05/2023] | |
| Seat belt warning system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Theft deterrent system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Parking brake ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Even though the electric parking brake is operating, control cannot be canceled | Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] | |
| Parking brake ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Even though the millimeter wave radar sensor is not dirty, the warning message "Clean Sensor" is displayed | Millimeter wave radar sensor assembly | Refer to REMOVAL [01/2017 - 05/2023] |
| The vehicle approach warning buzzer does not sound | Pre-collision city buzzer circuit | Refer to DTC C1A4A: Skid Control Buzzer Circuit [01/2017 - 05/2023] |
| Check millimeter wave radar sensor assembly installation position | Refer to INSTALLATION [01/2017 - 05/2023] | |
| Check installation of forward recognition camera | Refer to INSTALLATION [01/2017 - 05/2023] | |
| Forward recognition camera | Refer to REMOVAL [01/2017 - 05/2023] | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Even though the vehicle approach warning buzzer is sounding, brake control is not performed when decelerating | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Electronically controlled brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Even though the SET function is operating, the cruise SET indicator does not illuminate | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Cruise SET indicator light circuit | Refer to Cruise SET Indicator Light Circuit [01/2017 - 05/2023] | |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| The cruise control indicator remains illuminated | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| Indicators are not illuminated on the multi-information display in the combination meter assembly | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] | |
| The buzzer does not sound when control of vehicle speed by the dynamic radar cruise control is canceled | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023] |
| Combination meter assembly | Refer to REMOVAL [01/2017 - ] | |
| Hybrid vehicle control ECU assembly | Refer to REMOVAL [01/2017 - 05/2023] |
- *: When the "Radar Cruise Control Unavailable" message is displayed and "Front Radar Incorrect Axis Gap (Vertical) History: ON" is output, the millimeter wave radar sensor may be automatically performing beam axis calibration. In this case, the display is turned off due to beam axis adjustment being performed. Automatic calibration is complete when the "Radar Cruise Control Unavailable" messages turns off.