Problem Symptoms Table [09/2015 - ]
HINT:
- Use the table below to help determine the cause of the problem symptom. 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.
- Problem symptoms may occur if the electric power control system's functions malfunction. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.
DYNAMIC RADAR CRUISE CONTROL SYSTEM
| Symptom | Suspected Area | See page |
|---|---|---|
| Main switch cannot be turned ON (Cruise control indicator light combination meter does not illuminate) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| CRUISE main indicator light circuit | Refer to Cruise Main Indicator Light Circuit [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Vehicle speed setting cannot be performed (Cruise control indicator light on combination meter illuminates when main switch is turned ON, but turns off when operating SET function) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Vehicle speed setting cannot be performed (Cruise control indicator light on combination meter illuminates when main switch is turned ON and remains illuminated when operating SET function) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Stop light switch circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2015 - ] | |
| Park/neutral position switch (AA80E) | Refer to INSPECTION [09/2015 - ] | |
| Park/neutral position switch (AA80F) | Refer to REMOVAL [09/2015 - ] | |
| Transmission control switch circuit (AA80E) | Refer to Transmission Control Switch Circuit [09/2015 - ] | |
| Transmission control switch circuit (AA80F) | Refer to Transmission Control Switch Circuit [09/2015 - ] | |
| Shift paddle switch circuit (w/ Shift Paddle Switch) | Refer to Shift Paddle Switch Circuit [09/2015 - ] | |
| No. 1 meter ECU sub-assembly | Refer to COMPONENTS [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| While vehicle is driven with cruise control, set control is canceled (Cruise control indicator light remains illuminated) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Skid control ECU | Refer to REMOVAL [09/2015 - ] | |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Stop light switch circuit | Refer to DTC C1A05: Stop Light Switch Circuit [09/2015 - ] | |
| CRUISE main indicator light circuit | Refer to Cruise Main Indicator Light Circuit [09/2015 - ] | |
| Park/neutral position switch (AA80E) | Refer to INSPECTION [09/2015 - ] | |
| Park/neutral position switch (AA80F) | Refer to REMOVAL [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Hunting (Speed is not constant) | Skid control ECU | Refer to REMOVAL [09/2015 - ] |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Speedometer malfunction | Refer to Speedometer Malfunction [09/2015 - ] | |
| Front millimeter wave radar sensor power source circuit | Refer to Millimeter Wave Radar Sensor Power Source Circuit [09/2015 - ] | |
| Driving support ECU power source circuit | Refer to ECU Power Source Circuit [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Vehicle speed setting cannot be canceled (When Coast, Acceleration, Resume, Set speed change and control switch are operated) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Erroneous detection or lost sight of vehicle in front | Clean radar sensor with soft cloth, etc. | - |
| Improper aiming of sensor beam axis | - | |
| Warning buzzer does not sound | Warning buzzer | Refer to DTC C1A4A: Skid Control Buzzer Circuit [09/2015 - ] |
| Electronically control brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] | |
| Front millimeter wave radar sensor power source circuit | Refer to Millimeter Wave Radar Sensor Power Source Circuit [09/2015 - ] | |
| Driving support ECU power source circuit | Refer to ECU Power Source Circuit [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Set distance cannot be changed | Distance control switch circuit | Refer to Distance Control Switch Circuit [09/2015 - ] |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| No display | Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| No brake control (when decelerating) | Electronically control brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Driving support ECU power source circuit | Refer to ECU Power Source Circuit [09/2015 - ] | |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| Constant speed control mode cannot be turned on | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Constant speed control mode cannot be turned on | Front millimeter wave radar sensor | Refer to REMOVAL [09/2015 - ] |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] | |
| Skid control ECU | Refer to REMOVAL [09/2015 - ] | |
| Park/neutral position switch (AA80E) | Refer to INSPECTION [09/2015 - ] | |
| Park/neutral position switch (AA80F) | Refer to REMOVAL [09/2015 - ] | |
| ECM | Refer to REMOVAL [09/2015 - ] | |
| Transmission control switch circuit (AA80E) | Refer to Transmission Control Switch Circuit [09/2015 - ] | |
| Transmission control switch circuit (AA80F) | Refer to Transmission Control Switch Circuit [09/2015 - ] | |
| Shift paddle switch circuit (w/ Shift Paddle Switch) | Refer to Shift Paddle Switch Circuit [09/2015 - ] | |
| Stop light switch | Refer to ON-VEHICLE INSPECTION [09/2015 - ] | |
| CAN communication system | Refer to PRECAUTION [09/2015 - ] | |
| Driving support ECU | Refer to REMOVAL [09/2015 - ] | |
| Vehicle speed cannot be canceled with wiper HI (Including automatic wiper) | Windshield wiper switch | Refer to COMPONENTS [09/2015 - ] |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| Unable to adjust beam axis of front millimeter wave radar sensor | Check for DTC C1A10 | Refer to DTC C1A10: Front Radar Sensor [09/2015 - ] |
| Check position, distance and angle of reflector | - | |
| Check installation of front millimeter wave radar sensor | - | |
| Front millimeter wave radar sensor | Refer to COMPONENTS [09/2015 - ] | |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| System cannot change between constant speed control mode and vehicle-to-vehicle distance control mode | Cruise control switch circuit | Refer to Cruise Control Switch Circuit [09/2015 - ] |
| Driving support ECU | Refer to COMPONENTS [09/2015 - ] | |
| Dynamic radar cruise control cannot be canceled | Inspect VSC OFF switch | - |
| Both VSC and TRC are turned off | - | |
| The TRC is operated for a certain amount of time | - | |
| Operating the VSC system | - | |
| When the wiper is in the HI mode | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |