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 | See |
|---|---|---|
| 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 | 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 | |
| ECM | Refer to REMOVAL | |
| Set distance cannot be changed. | Distance control switch circuit | Refer to Distance Control Switch Circuit |
| Driving support ECU | Refer to REMOVAL | |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | Refer to REMOVAL | |
| Setting cannot be canceled in vehicle-to-vehicle distance control mode. | Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| ECU power source circuit | Refer to ECU Power Source Circuit | |
| LGND terminal circuit | Refer to TERMINALS OF ECU | |
| Millimeter wave radar sensor | Refer to ADJUSTMENT | |
| ECM | Refer to REMOVAL | |
| Driving support ECU | Refer to REMOVAL | |
| Vehicle speed setting cannot be performed. (The 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 | Refer to Cruise Control Switch Circuit |
| ECM | Refer to REMOVAL | |
| Vehicle speed setting cannot be performed with the constant speed mode. (The cruise main indicator light on combination meter 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 |
| Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor Circuit Malfunction | |
| Cruise control switch circuit | Refer to Cruise Control Switch Circuit | |
| Transmission control switch circuit | Refer to Transmission Control Switch Circuit | |
| ECM | Refer to REMOVAL | |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Driving support ECU | Refer to REMOVAL | |
| While vehicle is driven with cruise control on, the control is canceled. (The cruise main indicator light remains on.) | Stop light switch circuit | Refer to DTC P0571: Stop Light Switch Circuit Malfunction |
| Transmission control switch circuit | Refer to Transmission Control Switch Circuit | |
| 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; DTC P0503: Vehicle Speed Sensor Circuit Malfunction | |
| Wiper switch circuit (w/ rain sensor) | Refer to PROBLEM SYMPTOMS TABLE | |
| Wiper switch circuit (w/o rain sensor) | Refer to PROBLEM SYMPTOMS TABLE | |
| Driving support ECU | Refer to REMOVAL | |
| Park/neutral position switch | Refer to INSPECTION | |
| ECM | Refer to REMOVAL | |
| Pulling back on the control main switch does not cancel the cruise control. (The cruise main indicator light turns off.) | ECM | 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; DTC P0503: Vehicle Speed Sensor Circuit Malfunction |
| ECM | Refer to REMOVAL | |
| The cruise control is not canceled when vehicle speed drops below the low speed limit. (The cruise main indicator light turns off.) | ECM | 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 |
| ECM | Refer to REMOVAL | |
| Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light turns off.) | ECM | Refer to REMOVAL |
| Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light remains on.) | Wiper switch circuit (w/ rain sensor) | Refer to PROBLEM SYMPTOMS TABLE |
| Wiper switch circuit (w/o rain sensor) | Refer to PROBLEM SYMPTOMS TABLE | |
| ECM | Refer to REMOVAL | |
| Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light turns off.) | ECM | Refer to REMOVAL |
| Transmission control switch circuit | Refer to Transmission Control Switch Circuit | |
| Park/neutral position switch | Refer to INSPECTION | |
| ECM | Refer to REMOVAL | |
| Moving the shift lever does not cancel the cruise control. (The cruise main indicator light turns off.) | ECM | Refer to REMOVAL |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | Refer to DTC P0500: Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor Circuit Malfunction |
| SFI system | - | |
| ECM | Refer to REMOVAL | |
| The cruise main indicator light remains blinking. | TC and CG terminal circuit | Refer to TC and CG Terminal Circuit |
| ECM | Refer to REMOVAL | |
| Beam axis of millimeter wave radar sensor cannot be adjusted (completed). | Check position, distance and angle of reflector | - |
| Check installation of millimeter wave radar sensor | Refer to INSTALLATION | |
| Millimeter wave radar sensor | Refer to ADJUSTMENT | |
| Driving support ECU | Refer to REMOVAL | |
| ECM | Refer to REMOVAL | |
| Alarm buzzer does not sound. | Skid control buzzer circuit | Refer to Skid Control Buzzer Circuit |
| Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Millimeter wave radar sensor | Refer to ADJUSTMENT | |
| Driving support ECU | Refer to REMOVAL | |
| No brake control (when decelerating) | Vehicle stability control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Driving support ECU | Refer to REMOVAL | |
| ECM | Refer to REMOVAL | |
| The READY indicator light does not come on | Cruise READY Indicator Light Circuit | Refer to Cruise READY Indicator Light Circuit |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| The Main indicator light does not come on | Cruise Main Indicator Light Circuit | Refer to Cruise Main Indicator Light Circuit |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |