DYNAMIC RADAR CRUISE CONTROL 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 |
|---|---|---|
| The cruise control main switch cannot be turned on. | Driving support ECU power source circuit | |
| Cruise control switch circuit | ||
| CRUISE main indicator light circuit | ||
| Driving support ECU | ||
| "Setting cannot be changed between constant speed control mode and vehicle-to-vehicle distance control mode." | Cruise control switch circuit | |
| Combination meter assembly | ||
| Driving support ECU | ||
| Set distance cannot be changed. | Distance control switch circuit | |
| Combination meter assembly | ||
| Driving support ECU | ||
| "Setting cannot be canceled in vehicle-to-vehicle distance control mode." | Combination meter assembly | |
| Millimeter wave radar sensor assembly | ||
| Driving support ECU | ||
| "Vehicle speed setting cannot be performed. (The cruise main indicator light on combination meter illuminates when main switch is turned on, but turns off when operating SET function.)" | Cruise control switch circuit | |
| Driving support ECU | ||
| "Vehicle speed setting cannot be performed with the constant speed mode. (The cruise main indicator light on combination meter illuminates when main switch is turned on, and remains on when operating SET function is operating.)" | Stop light switch circuit | |
| Vehicle speed sensor circuit | ||
| Cruise control switch circuit | ||
| Hybrid control system | ||
| Driving support ECU | ||
| "Vehicle speed setting cannot be performed with the vehicle-to-vehicle distance control mode. (The cruise main indicator light on combination meter illuminates when main switch is turned on, and remains on when SET function is operating.) | Stop light switch circuit | |
| Vehicle speed sensor circuit | ||
| Cruise control switch circuit | ||
| Hybrid control system | ||
| Wiper signal circuit | ||
| Electronically controlled brake system | ||
| "While vehicle is driven with cruise control on, the control is canceled." | Stop light switch circuit | |
| Hybrid control system | ||
| Electronically controlled brake system | ||
| Cruise control switch circuit | ||
| Vehicle speed sensor circuit | ||
| Wiper signal circuit | ||
| Driving support ECU | ||
| "Pulling back on the control main switch does not cancel the cruise control. (The cruise main indicator light remains on.)" | Cruise control switch circuit | |
| Driving support ECU | ||
| "Pulling back on the control main switch does not cancel the cruise control. (The cruise main indicator light goes off.)" | Driving support ECU | |
| "The cruise control is not canceled when vehicle speed drops below the low speed limit. (The cruise main indicator light remains on.)" | Vehicle speed sensor circuit | |
| Driving support ECU | ||
| "The cruise control is not canceled when vehicle speed drops below the low speed limit. (The cruise main indicator light goes off.)" | Driving support ECU | |
| "Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light remains on.)" | Stop light switch circuit | |
| Driving support ECU | ||
| "Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light goes off.)" | Driving support ECU | |
| "Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light remains on.)" | Wiper signal circuit | |
| Driving support ECU | ||
| "Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light goes off.)" | Driving support ECU | |
| "Moving the shift lever does not cancel the cruise control. (The cruise main indicator light remains on.)" | Hybrid control system | |
| Driving support ECU | ||
| "Moving the shift lever does not cancel the cruise control. (The cruise main indicator light goes off.)" | Driving support ECU | |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | |
| SFI system (for 2GR-FXE) | ||
| Hybrid control system | ||
| Driving support ECU | ||
| "Even though front millimeter wave radar sensor assembly is not dirty, ""CLEAN RADAR SENSOR"" is displayed" | Millimeter wave radar sensor assembly is dirty | - |
| Adjust front millimeter wave radar sensor assembly | ||
| Millimeter wave radar sensor assembly | ||
| No information on the multi-information display | Combination meter assembly | |
| "Beam axis of millimeter wave radar sensor assembly cannot be adjusted (completed)." | Check position, distance and angle of reflector | |
| Check installation of millimeter wave radar sensor assembly | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU | ||
| Alarm buzzer does not sound. | Skid control buzzer circuit | |
| Electronically controlled brake system | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU | ||
| No brake control (when decelerating) | Electronically controlled brake system | |
| Driving support ECU | ||
| The cruise main indicator light remains blinking. | TC and CG terminal circuit | |
| Driving support ECU |