Problem Symptoms Table
DYNAMIC LASER CRUISE CONTROL SYSTEM
PROBLEM SYMPTOMS TABLE (DYNAMIC LASER CRUISE CONTROL SYSTEM)
| Symptom | Suspected area |
|---|---|
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. Hybrid vehicle control ECU. See 2 | |
| 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 |
| 2. Hybrid vehicle control ECU. See 2 | |
| Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, and remains illuminated when operating SET function.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. Stop light switch circuit. See DTC P0571 STOP LIGHT SWITCH CIRCUIT MALFUNCTION | |
| 3. Park/Neutral position switch circuit (DTC P0705) | |
| 4. COMBINATION METER | |
| 5. Hybrid vehicle control ECU. See 2 | |
| While the vehicle is driven with cruise control, the set control is canceled. (CRUISE main indicator light remains illuminated.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. VEHICLE SPEED SENSOR CIRCUIT | |
| 3. Stop light switch circuit. See DTC P0571 STOP LIGHT SWITCH CIRCUIT MALFUNCTION | |
| 4. CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park/Neutral position switch circuit (DTC P0705) | |
| 6. Hybrid vehicle control ECU. See 2 | |
| Hunting (Speed is not constant.) | 1. VEHICLE SPEED SENSOR CIRCUIT |
| 2. Malfunction in speed meter circuit | |
| 3. LASER SENSOR POWER SOURCE CIRCUIT | |
| 4. DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 5. DISTANCE CONTROL ECU | |
| 6. Hybrid vehicle control ECU. See 2 | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. Hybrid vehicle control ECU. See 2 | |
| Erroneous detection or lost sight of the vehicle ahead. | 1. Clean laser sensor with soft cloth, etc. |
| 2. Improper aiming of sensor beam axis. See REMOVAL | |
| Alarm buzzer does not sound. | 1. SKID CONTROL BUZZER CIRCUIT |
| 2. VSC system. See HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. LASER SENSOR POWER SOURCE CIRCUIT | |
| 4. DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 5. DISTANCE CONTROL ECU | |
| 6. Hybrid vehicle control ECU. See 2 | |
| Set distance cannot be changed. | 1. COMBINATION METER |
| 2. DISTANCE CONTROL SWITCH CIRCUIT | |
| 3. CRUISE CONTROL SWITCH CIRCUIT | |
| 4. Hybrid vehicle control ECU. See 2 | |
| No display | 1. COMBINATION METER |
| 2. Hybrid vehicle control ECU. See 2 | |
| No brake control (when decelerating) | 1. VSC system. See HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 3. DISTANCE CONTROL ECU | |
| 4. Hybrid vehicle control ECU. See 2 | |
| Constant speed mode cannot be turned on. | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. COMBINATION METER | |
| 3. Hybrid vehicle control ECU. See 2 | |
| Vehicle speed cannot be canceled with wiper HI. (Including automatic wiper) | 1. RAIN SENSOR CIRCUIT |
| 2. WIPER AND WASHER SWITCH CIRCUIT | |
| 3. DISTANCE CONTROL ECU | |
| 4. Hybrid vehicle control ECU. See 2 | |
| Setting cannot be canceled in SNOW mode. | 1. Hybrid vehicle control ECU. See 2 |
| Unable to adjust (complete) beam axis of millimeter wave radar sensor. | 1. CHECK FOR DTC P1570 |
| 2. Check position, distance and angle of reflector. See REMOVAL | |
| 3. Check installation of laser sensor. See REMOVAL | |
| 4. LASER SENSOR | |
| 5. DISTANCE CONTROL ECU | |
| 6. Hybrid vehicle control ECU. See 2 | |
| Cannot change between constant speed control mode and vehicle-to-vehicle distance control mode | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. Hybrid vehicle control ECU. See 2 |