Problem Symptoms Table
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
PROBLEM SYMPTOMS - DYNAMIC RADAR CRUISE CONTROL SYSTEM
| Symptom | Suspected Area | See Procedure |
|---|---|---|
| Main switch cannot be turned on (CRUISE main indicator light on combination meter does not illuminate) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| Meter/gauge system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Vehicle speed setting cannot be performed (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 | CRUISE CONTROL SWITCH CIRCUIT |
| ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be performed (CRUISE main indicator light on combination meter illuminates when main switch is turned on, and remains illuminated when operating SET function) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Vehicle speed sensor circuit | DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| Meter/gauge system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| While the vehicle is driving with cruise control, the SET control is canceled (CRUISE main indicator light remains illuminated) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Vehicle speed sensor circuit | DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| Stop light switch circuit | DTC P0571 STOP LIGHT SWITCH CIRCUIT MALFUNCTION | |
| CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| Park/neutral position switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| Hunting (speed is not constant) | Vehicle speed sensor circuit | DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH |
| Speedometer malfunction | SPEEDOMETER MALFUNCTION | |
| Millimeter wave radar sensor power source circuit | MILLIMETER WAVE RADAR SENSOR POWER SOURCE CIRCUIT | |
| Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| Distance control ECU | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be canceled (CANCEL function failure) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| ECM | TERMINALS OF ECU | |
| DTC is not output, or is output when it should not be | TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| ECM | TERMINALS OF ECU | |
| Erroneous detection or lost sight of vehicle in front | Clean radar sensor with soft cloth, etc. | - |
| Improper aiming of sensor beam axis | MILLIMETER WAVE RADAR SENSOR | |
| Warning buzzer does not sound | Warning buzzer circuit | DTC P1575 WARNING BUZZER MALFUNCTION |
| Vehicle stability control system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Millimeter wave radar sensor power source circuit | MILLIMETER WAVE RADAR SENSOR POWER SOURCE CIRCUIT | |
| Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| Distance control ECU | TERMINALS OF ECU | |
| ECM | TERMINALS OF ECU | |
| Set distance cannot be changed | Meter/gauge system | HOW TO PROCEED WITH TROUBLESHOOTING |
| Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT | |
| Distance control switch circuit | DISTANCE CONTROL SWITCH CIRCUIT | |
| ECM | TERMINALS OF ECU | |
| No display | Meter/gauge system | HOW TO PROCEED WITH TROUBLESHOOTING |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| No brake control (when decelerating) | Vehicle stability control system | HOW TO PROCEED WITH TROUBLESHOOTING |
| Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| Distance control ECU | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| Constant speed control mode cannot be turned on | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Meter/gauge system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| Vehicle speed cannot be canceled with wiper HI (including automatic wiper) | Wiper switch (HI speed) circuit | WIPER SWITCH (HI SPEED) CIRCUIT |
| Distance control ECU | TERMINALS OF ECU | |
| ECM | TERMINALS OF ECU | |
| Unable to adjust beam axis of front millimeter wave radar sensor | Check for DTC P1570 | DTC P1570 RADAR SENSOR MALFUNCTION |
| Check position, distance and angle of reflector | MILLIMETER WAVE RADAR SENSOR | |
| Check installation of millimeter wave radar sensor | MILLIMETER WAVE RADAR SENSOR | |
| Millimeter wave radar sensor | MILLIMETER WAVE RADAR SENSOR | |
| Distance control ECU | TERMINALS OF ECU | |
| ECM | TERMINALS OF ECU | |
| System cannot change between constant speed control mode and vehicle-to-vehicle distance control mode | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| ECM | TERMINALS OF ECU |