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 dynamic radar cruise control system cannot be turned on using the cruise control main switch (ON-OFF button). | Cruise control main switch circuit | |
| Cruise main indicator circuit | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Cannot change between vehicle-to-vehicle distance control mode and constant speed control mode. | Cruise control main switch circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Set distance cannot be changed. | Distance control switch circuit | |
| Combination meter assembly | ||
| Driving support ECU assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Cannot select vehicle-to-vehicle distance control mode. | Combination meter assembly | |
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed setting cannot be performed. (The cruise control indicator remains illuminated in the combination meter when dynamic radar cruise control system is turned on using the cruise control main switch (ON-OFF button), but turns off when the SET function is operated.) | Cruise control main switch circuit | |
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed setting cannot be performed with constant speed control mode. (The cruise control indicator remains illuminated in the combination meter when dynamic radar cruise control system is turned on using the cruise control main switch (ON-OFF button), and remains on when the SET function is operated.) | Stop light switch circuit | |
| Vehicle speed sensor circuit | ||
| Cruise control main switch circuit | ||
| Transmission control switch circuit (for U660E) | ||
| Transmission control switch circuit (for U760F) | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed setting cannot be performed with vehicle-to-vehicle distance control mode. (The cruise control indicator remains illuminated in the combination meter when dynamic radar cruise control system is turned on using the cruise control main switch (ON-OFF button), and remains on when the SET function is operated.) | Millimeter wave radar sensor assembly | |
| Stop light switch circuit | ||
| Vehicle speed sensor circuit | ||
| Cruise control main switch circuit | ||
| Transmission control switch circuit (for U660E) | ||
| Transmission control switch circuit (for U760E) | ||
| Wiper signal circuit | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| While vehicle is being driven with the dynamic radar cruise control system controlling vehicle speed, the control of vehicle speed is canceled. | Stop light switch circuit | |
| Transmission control switch circuit (for U660E) | ||
| Transmission control switch circuit (for U760F) | ||
| Vehicle stability control system | ||
| Cruise control main switch circuit | ||
| Combination meter assembly | ||
| Vehicle speed sensor circuit | ||
| Wiper signal circuit | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Pulling back on the cruise control main switch does not cancel vehicle speed control by the dynamic radar cruise control system. (The cruise control indicator remains illuminated.) | Cruise control main switch circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Pulling back on the cruise control main switch does not cancel vehicle speed control by the dynamic radar cruise control system. (The vehicle-to-vehicle cruise control indicator goes out.) | ECM (for 2AR-FE) | |
| ECM (for 2GR-FE) | ||
| Vehicle speed control by the dynamic radar cruise control system is not canceled when vehicle speed drops below the low speed limit. (The cruise control indicator remains illuminated.) | Vehicle speed sensor circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed control by the dynamic radar cruise control system is not canceled when vehicle speed drops below the low speed limit. (The vehicle-to-vehicle cruise control indicator goes out.) | ECM (for 2AR-FE) | |
| ECM (for 2GR-FE) | ||
| Depressing the brake pedal does not cancel vehicle speed control by the dynamic radar cruise control system. (The cruise control indicator remains illuminated.) | Stop light switch circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Depressing the brake pedal does not cancel vehicle speed control by the dynamic radar cruise control system. (The vehicle-to-vehicle cruise control indicator goes out.) | ECM (for 2AR-FE) | |
| ECM (for 2GR-FE) | ||
| Vehicle speed control by the dynamic radar cruise control system is not canceled when the wipers operate on HI. (The cruise control indicator remains illuminated.) | Wiper signal circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed control by the dynamic radar cruise control system is not canceled when the wipers operate on HI. (The cruise control indicator (vehicle-to-vehicle distance control mode) goes out.) | ECM (for 2AR-FE) | |
| ECM (for 2GR-FE) | ||
| Moving the shift lever or operating the shift paddle switch* does not cancel vehicle speed control by the dynamic radar cruise control system. (The cruise control indicator remains illuminated.) | Stop light switch circuit | |
| Transmission control switch circuit (for U660E) | ||
| Transmission control switch circuit (for U760F) | ||
| Shift paddle switch circuit (for U660E)* | ||
| Shift paddle switch circuit (for U760E)* | ||
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Moving the shift lever does not cancel vehicle speed control by the dynamic radar cruise control system. (The cruise control indicator (vehicle-to-vehicle distance control mode) goes out.) | ECM (for 2AR-FE) | |
| ECM (for 2GR-FE) | ||
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | |
| SFI system (for 2AR-FE) | ||
| SFI system (for 2GR-FE) | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| Even though the front millimeter wave radar sensor is not dirty, the warning message "CLEAN RADAR SENSOR" is displayed. | Millimeter wave radar sensor assembly is dirty | - |
| Adjust front millimeter wave radar sensor assembly | ||
| Millimeter wave radar sensor assembly | ||
| The beam axis of the millimeter wave radar sensor cannot be adjusted. | Check position, distance and angle of reflector | - |
| Check installation of millimeter wave radar sensor assembly | ||
| Millimeter wave radar sensor assembly | ||
| Driving support ECU assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| The warning buzzer does not sound. | Skid control buzzer circuit | |
| Vehicle stability control system | ||
| Millimeter wave radar sensor assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| No brake control (when decelerating) | Vehicle stability control system | |
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) | ||
| The cruise control SET indicator does not illuminate. (Vehicle speed can be set.) | Cruise control SET indicator circuit | |
| Combination meter assembly | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2GR-FE) |
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*: w/ Shift Paddle Switch