Problem Symptoms Table
If a normal system code is displayed during the DTC check but the problem still occurs, check the suspected areas for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting article.
HINT:
Inspect the "Fuse" and "Relay" before confirming the suspected areas as shown in the chart below. Inspect each suspected area for the corresponding symptom in numerical order.
DYNAMIC LASER CRUISE CONTROL SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Main switch cannot be turned ON. (Cruise indicator light in combination meter does not come on.) | 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. ECM | Refer to TERMINALS OF ECU | |
| Vehicle speed setting cannot be done. (Although indicator light in combination meter comes on when the main switch is turned ON, it goes off when vehicle speed is set.) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. ECM | Refer to TERMINALS OF ECU | |
| Setting cannot be done. (Indicator light in combination meter comes on when the main switch is turned ON and it remains ON while setting.) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction | |
| 3. Park/Neutral position switch circuit (DTC P0705) | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) | |
| 4. Transmission control switch circuit | Refer to Transmission Control Switch Circuit | |
| 5. Combination meter system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 6. ECM | Refer to TERMINALS OF ECU | |
| While the vehicle is driven with cruise control, the set control is cancelled. (Indicator light and CRUISE remain ON.) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor Circuit Malfunction | |
| 3. Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction | |
| 4. Cruise main indicator light circuit | Refer to Cruise Main Indicator Light Circuit | |
| 5. Park/Neutral position switch circuit (DTC P0705) | Refer to DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) | |
| 6. ECM | Refer to TERMINALS OF ECU | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor Circuit Malfunction |
| 2. Malfunction in speed meter circuit | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. Laser sensor power source circuit | Refer to Laser Sensor Power Source Circuit | |
| 4. Distance control ECU power source circuit | Refer to Distance Control ECU Power Source Circuit | |
| 5. Distance control ECU | Refer to TERMINALS OF ECU | |
| 6. ECM | Refer to TERMINALS OF ECU | |
| Setting cannot be cancelled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. ECM | Refer to TERMINALS OF ECU | |
| Erroneous detection or lost sight of the vehicle ahead. | 1. Clean laser sensor with soft cloth, etc. | Refer to ADJUSTMENT |
| 2. Improper aiming of sensor beam axis | Refer to ADJUSTMENT | |
| Alarm buzzer does not sound. | 1. Buzzer circuit | Refer to Skid Control Buzzer Circuit |
| 2. VSC system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. Laser sensor power source circuit | Refer to Laser Sensor Power Source Circuit | |
| 4. Distance control ECU power source circuit | Refer to Distance Control ECU Power Source Circuit | |
| 5. Distance control ECU | Refer to TERMINALS OF ECU | |
| 6. ECM | Refer to TERMINALS OF ECU | |
| Set distance cannot be changed. | 1. Combination meter system | 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. ECM | Refer to TERMINALS OF ECU | |
| No display | 1. Combination meter system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. ECM | Refer to TERMINALS OF 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 | Refer to TERMINALS OF ECU | |
| 4. ECM | Refer to TERMINALS OF ECU | |
| Constant speed mode cannot be turned on. | 1. Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| 2. Combination meter system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 3. ECM | Refer to TERMINALS OF ECU | |
| Vehicle speed setting cannot be cancelled with wiper LO/HI. (Including automatic wiper) | 1. Rain sensor circuit | Refer to DTC B1279: Rain Sensor Communication Stop |
| 2. Wiper switch circuit | Refer to Wiper Signal Circuit | |
| 3. Distance control ECU | Refer to TERMINALS OF ECU | |
| 4. ECM | Refer to TERMINALS OF ECU | |
| Unable to adjust (complete) 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 | Refer to ADJUSTMENT | |
| 3. Check installation of laser sensor | Refer to ADJUSTMENT | |
| 4. Laser sensor | Refer to Laser Sensor Power Source Circuit | |
| 5. ECM | Refer to TERMINALS OF ECU |