Problem Symptoms Table
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 fuse and relay related to this system before inspecting the suspected areas below.
DYNAMIC RADAR CRUISE CONTROL SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Main switch cannot turned ON (CRUISE main indicator light combination meter does not illuminate) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. CRUISE main indicator light circuit | Refer to Cruise Main Indicator Light Circuit | |
| 3. Hybrid vehicle control ECU | - | |
| Vehicle speed setting cannot be done (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, but turns off when operating SET function) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Hybrid vehicle control ECU | - | |
| Vehicle speed setting cannot be done (CRUISE main indicator light combination meter illuminates when main switch is turned ON and remains illuminated when operating SET function) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Stop light switch circuit | Refer to DTC P0571: Brake Switch "A" Circuit | |
| 3. Shift lever position sensor | Refer to COMPONENTS | |
| 4. Transmission control switch circuit | Refer to PARTS LOCATION | |
| 5. Combination meter | - | |
| 6. Hybrid vehicle control ECU | - | |
| While vehicle is driven with cruise control, set control is canceled (CRUISE main indicator light remains illuminated) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction | |
| 3. Stop light switch circuit | Refer to DTC P0571: Brake Switch "A" Circuit | |
| 4. Cruise main indicator light circuit | Refer to Cruise Main Indicator Light Circuit | |
| 5. Shift lever position sensor | Refer to COMPONENTS | |
| 6. Hybrid vehicle control ECU | - | |
| Hunting (Speed is not constant) | 1. Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction |
| 2. SFI system | Refer to Speedometer Malfunction | |
| 3. Hybrid vehicle control ECU | - | |
| Vehicle speed setting cannot be canceled (When Coast, Acceleration, Resume, Set speed change and control switch are operated) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Hybrid vehicle control ECU | - | |
| Erroneous detection or lost sight of vehicle in front | 1. Clean laser sensor with soft cloth, etc. | - |
| 2. Improper aiming of sensor beam axis | - | |
| Warning buzzer does not sound | 1. Buzzer circuit | Refer to Skid Control Buzzer Circuit |
| 2. VSC system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. Millimeter wave radar sensor power source circuit | Refer to Millimeter Wave Radar Sensor Power Source Circuit | |
| 4. Distance control ECU power source circuit | Refer to Distance Control ECU Power Source Circuit | |
| 5. Distance control ECU | - | |
| 6. Hybrid vehicle control ECU | - | |
| Set distance cannot be changed | 1. Combination meter | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Distance control switch circuit | Refer to Distance Control Switch Circuit | |
| 3. Cruise control switch circuit | Refer to Cruise Control Switch Circuit | |
| 4. Hybrid vehicle control ECU | - | |
| No display | 1. Combination meter | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Hybrid vehicle control ECU | - | |
| No brake control (when decelerating) | 1. VSC system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Distance control ECU power source circuit | Refer to Distance Control ECU Power Source Circuit | |
| 3. Distance control ECU | - | |
| 4. Hybrid vehicle control ECU | - | |
| Constant speed control mode cannot be turned on | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Combination meter | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. Hybrid vehicle control ECU | - | |
| Vehicle speed cannot be canceled with wiper HI (Including automatic wiper) | 1. Rain sensor | Refer to COMPONENTS |
| 2. Wiper switch circuit | Refer to Wiper Signal Circuit | |
| 3. Distance control ECU | - | |
| 4. Hybrid vehicle control ECU | - | |
| Setting cannot be canceled in SNOW mode | 1. Hybrid mode select switch | Refer to PARTS LOCATION |
| 2. Automatic transmission system | - | |
| 3. Hybrid vehicle control ECU | - | |
| Unable to adjust beam axis of millimeter wave radar sensor | 1. Check for DTC P1570 | Refer to DTC P1570: Radar Sensor Malfunction |
| 2. Check position, distance and angle of reflector | - | |
| 3. Check installation of millimeter wave radar sensor | - | |
| 4. Millimeter wave radar sensor | Refer to COMPONENTS | |
| 5. Distance control ECU | - | |
| 6. Hybrid vehicle control ECU | - | |
| Cannot change between constant speed control mode and vehicle-to-vehicle distance control mode | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Hybrid vehicle control ECU | - |