Problem Symptoms Table [09/2014 - 10/2015]
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 switch (ON/OFF button) | Driving support ECU power source circuit | Refer to ECU Power Source Circuit [09/2014 - 11/2017] |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] | |
| Cruise main indicator light circuit | Refer to Cruise Main Indicator Light Circuit [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Cannot change between vehicle-to-vehicle distance control mode and constant speed control mode | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Set distance cannot be changed | Distance control switch circuit | Refer to Distance Control Switch Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Cannot select vehicle-to-vehicle distance control mode | Combination meter assembly | Refer to REMOVAL [09/2014 - ] |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Vehicle speed setting cannot be performed (The cruise control indicator remains illuminated in the combination meter assembly when the cruise control system is turned on using the cruise control switch (ON/OFF button), but turns off when the SET function is operated) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Vehicle speed setting cannot be performed with constant speed control mode (The cruise control indicator remains illuminated in the combination meter assembly when the cruise control system is turned on using the cruise control switch (ON/OFF button), and remains on when the SET function is operated) | Stop light switch assembly circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2014 - 11/2017] |
| Vehicle speed sensor circuit | Refer to Speed Signal Circuit [09/2014 - 10/2015] | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] | |
| Transmission control switch circuit (for A760H) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Transmission control switch circuit (for AA81E) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for A760H) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for AA81E) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Vehicle speed setting cannot be performed with vehicle-to-vehicle distance control mode (The cruise control indicator remains illuminated in the combination meter assembly when the cruise control system is turned on using the cruise control switch (ON/OFF button), and remains on when the SET function is operated) | Millimeter wave radar sensor assembly | Refer to REMOVAL [09/2014 - 11/2017] |
| Stop light switch assembly circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2014 - 11/2017] | |
| Vehicle speed sensor circuit | Refer to Speed Signal Circuit [09/2014 - 10/2015] | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] | |
| Transmission control switch circuit (for A760H) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Transmission control switch circuit (for AA81E) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for A760H) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for AA81E) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Wiper signal circuit | Refer to Wiper Signal Circuit [09/2014 - 11/2017] | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| While vehicle is driven with the dynamic radar cruise control system controlling vehicle speed, the control of vehicle speed is canceled | Stop light switch assembly circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2014 - 11/2017] |
| Transmission control switch circuit (for A760H) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Transmission control switch circuit (for AA81E) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for A760H) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for AA81E) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] | |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Vehicle speed sensor circuit | Refer to Speed Signal Circuit [09/2014 - 10/2015] | |
| Wiper signal circuit | Refer to Wiper Signal Circuit [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Pulling back on the cruise control switch does not cancel vehicle speed control by the dynamic radar cruise control system (The cruise control indicator remains illuminated) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Pulling back on the cruise control switch does not cancel vehicle speed control by the dynamic radar cruise control system (The cruise control indicator (Vehicle-to-vehicle distance control mode) goes off) | Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |
| 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 | Refer to Speed Signal Circuit [09/2014 - 10/2015] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| 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 (Vehicle-to-vehicle distance control mode) goes off) | Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |
| 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 assembly circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Depressing the brake pedal does not cancel vehicle speed control by the dynamic radar cruise control system (The cruise control indicator (Vehicle-to-vehicle distance control mode) goes off) | Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |
| Vehicle speed control by the dynamic radar cruise control system is not canceled when the wipers operate on HI (The cruise control indicator light remains illuminated) | Wiper signal circuit | Refer to Wiper Signal Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| 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) light goes off) | Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |
| Moving the shift lever does not cancel vehicle speed control by the dynamic radar cruise control system (The cruise control indicator remains illuminated) | Transmission control switch circuit (for A760H) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] |
| Transmission control switch circuit (for AA81E) | Refer to Transmission Control Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for A760H) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Shift paddle switch circuit (for AA81E) | Refer to Shift Paddle Switch Circuit [09/2014 - 11/2017] | |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| 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 off) | Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |
| Hunting (Speed is not constant) | Vehicle speed sensor circuit | Refer to Speed Signal Circuit [09/2014 - 10/2015] |
| SFI system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| Even though the front millimeter wave radar sensor assembly 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 | Refer to ADJUSTMENT [09/2014 - 11/2017] | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [09/2014 - 11/2017] | |
| The beam axis of the millimeter wave radar sensor cannot be adjusted | Check position, distance and angle of reflector | Refer to ADJUSTMENT [09/2014 - 11/2017] |
| Check installation of millimeter wave radar sensor assembly | Refer to INSTALLATION [09/2014 - 11/2017] | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| The warning buzzer does not sound | Skid control buzzer circuit | Refer to DTC C1A4A: Skid Control Buzzer Circuit [09/2014 - 11/2017] |
| Millimeter wave radar sensor assembly | Refer to REMOVAL [09/2014 - 11/2017] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| No brake control (when decelerating) | Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] | |
| The cruise control SET indicator does not illuminate (Vehicle speed can be set) | Cruise control SET indicator light circuit | Refer to Cruise SET Indicator Light Circuit [09/2014 - 11/2017] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Driving support ECU assembly | Refer to REMOVAL [09/2014 - 10/2022] |