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
| Symptom | Suspected Area | Reference |
|---|---|---|
| The cruise control main switch cannot be turned on. | Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| Cruise main indicator light circuit | Refer to Cruise Main Indicator Light Circuit | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Setting cannot be changed between constant speed control mode and vehicle-to-vehicle distance control mode. | Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL | |
| Distance control ECU | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Set distance cannot be changed. | Distance control switch circuit | Refer to Distance Control Switch Circuit |
| Distance control ECU | Refer to REMOVAL | |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Setting cannot be canceled in vehicle-to-vehicle distance control mode. | Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Distance control ECU power source circuit | Refer to Distance Control ECU Power Source Circuit | |
| LGND terminal circuit | Refer to TERMINALS OF ECU | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Distance control ECU | Refer to REMOVAL | |
| Vehicle speed setting cannot be performed. (The cruise main indicator light on the combination meter assembly illuminates when main switch is turned on, but turns off when operating SET function.) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Vehicle speed setting cannot be performed with the constant speed mode. (The cruise main indicator light on the combination meter assembly illuminates when main switch is turned on, and remains on when operating SET function.) | Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction; DTC P0571: Brake Switch "A" Circuit |
| Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit | |
| Automatic transaxle system (for A760E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Automatic transaxle system (for A960E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Vehicle speed setting cannot be performed with the vehicle-to-vehicle distance control mode. (The cruise main indicator light illuminates when main switch is turned on, and remains on when SET function is operating.) | Millimeter wave radar sensor assembly | Refer to REMOVAL |
| Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction; DTC P0571: Brake Switch "A" Circuit | |
| Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit | |
| Automatic transaxle system (for A760E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Automatic transaxle system (for A960E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Wiper signal circuit | Refer to Wiper Signal Circuit | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Distance control ECU | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| While driving vehicle with the cruise control on, the dynamic radar cruise control is canceled. | Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction; DTC P0571: Brake Switch "A" Circuit |
| Automatic transaxle system (for A760E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Automatic transaxle system (for A960E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit | |
| Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction | |
| Wiper signal circuit | Refer to Wiper Signal Circuit | |
| Distance control ECU | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Pulling back on the cruise control main switch does not cancel the cruise control. (The cruise main indicator light remains on.) | Cruise control switch circuit | Refer to Cruise Control Switch Circuit |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Pulling back on the cruise control main switch does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| The cruise control is not canceled when vehicle speed drops below the low speed limit. (The cruise main indicator light remains on.) | Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| The cruise control is not canceled when vehicle speed drops below the low speed limit. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light remains on.) | Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction; DTC P0571: Brake Switch "A" Circuit |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Cruise control operation is not canceled when wipers on HI. (The cruise main indicator light remains on.) | Wiper signal circuit | Refer to Wiper Signal Circuit |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Cruise control operation is not canceled when wipers on HI. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Moving the shift lever does not cancel the cruise control. (The cruise main indicator light remains on.) | Automatic transaxle system (for A760E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Automatic transaxle system (for A960E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Moving the shift lever does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Shifting the paddle shift switch does not cancel the cruise control. (The cruise main indicator light remains on.) | Automatic transaxle system (for A760E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Automatic transaxle system (for A960E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Shifting the paddle shift switch does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FSE) | Refer to REMOVAL |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction |
| SFI system (for 2GR-FSE) | Refer to PROBLEM SYMPTOMS TABLE | |
| SFI system (for 4GR-FSE) | Refer to PROBLEM SYMPTOMS TABLE | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Even though the front millimeter wave radar sensor assembly is not dirty, "CLEAN RADAR SENSOR" is displayed. | Millimeter wave radar sensor assembly is dirty | - |
| Adjust millimeter wave radar sensor assembly | Refer to ADJUSTMENT | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL | |
| No information on the multi-information display. | Combination meter assembly | Refer to REMOVAL |
| Beam axis of millimeter wave radar sensor cannot be adjusted (completed). | Check position, distance and angle of reflector | Refer to ADJUSTMENT |
| Check installation of millimeter wave radar sensor | Refer to COMPONENTS | |
| Millimeter wave radar sensor assembly | Refer to REMOVAL | |
| Distance control ECU | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| Alarm buzzer does not sound. | Skid control buzzer circuit | Refer to Skid Control Buzzer Circuit |
| No brake control (when decelerating). | Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Distance control ECU | Refer to REMOVAL | |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL | |
| The cruise main indicator light remains blinking. | TC and CG terminal circuit | Refer to TC and CG Terminal Circuit |
| ECM (for 2GR-FSE) | Refer to REMOVAL | |
| ECM (for 4GR-FSE) | Refer to REMOVAL |