DYNAMIC RADAR CRUISE CONTROL SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| The cruise control main switch cannot be turned on. | Cruise control switch circuit | |
| Cruise main indicator light circuit | ||
| ECM (for 2GR-FE) | ||
| Setting cannot be changed between constant speed control mode and vehicle-to-vehicle distance control mode. | Cruise control switch circuit | |
| Meter/gauge system | ||
| ECM (for 2GR-FE) | ||
| Set distance cannot be changed. | Distance control switch circuit | |
| Driving support ECU | ||
| Meter/gauge system | ||
| ECM (for 2GR-FE) | ||
| Setting cannot be canceled in vehicle-to-vehicle distance control mode. | Meter/gauge system | |
| Distance control switch circuit | ||
| LGND terminal circuit | ||
| Millimeter wave radar sensor | ||
| ECM (for 2GR-FE) | ||
| Driving support ECU | ||
| 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 | |
| ECM (for 2GR-FE) | ||
| 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 is operating.) | Stop light switch circuit | |
| Vehicle speed sensor circuit | ||
| Cruise control switch circuit | ||
| Transmission range sensor circuit (for U660F) | ||
| Vehicle stability control system | ||
| Driving support ECU | ||
| ECM (for 2GR-FE) | ||
| While vehicle is driven with cruise control on, the control is canceled. (The cruise main indicator light remains on.) | Stop light switch circuit | |
| Transmission range sensor circuit (for U660F) | ||
| Vehicle stability control system | ||
| Cruise control switch circuit | ||
| Vehicle speed sensor circuit | ||
| Wiper switch circuit | ||
| Driving support ECU | ||
| Park/neutral position switch (for U660F) | ||
| ECM (for 2GR-FE) | ||
| Pulling back on the control main switch does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FE) | |
| 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 | |
| ECM (for 2GR-FE) | ||
| 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-FE) | |
| Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light remains on.) | Stop light switch circuit | |
| ECM (for 2GR-FE) | ||
| Depressing the brake pedal does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FE) | |
| Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light remains on.) | Fuse (WIP-S) | - |
| Wiper switch circuit | ||
| ECM (for 2GR-FE) | ||
| Vehicle speed cannot be canceled with wiper HI. (The cruise main indicator light goes off.) | Transmission range sensor circuit (for U660F) | |
| Park/neutral position switch (for U660F) | ||
| ECM (for 2GR-FE) | ||
| Moving the shift lever does not cancel the cruise control. (The cruise main indicator light goes off.) | ECM (for 2GR-FE) | |
| Operating the transmission shift switch does not cancel the cruise control. (The cruise main indicator light remains on.)* | Transmission range sensor circuit (for U660F) | |
| ECM (for 2GR-FE) | ||
| Operating the transmission shift switch does not cancel the cruise control. (The cruise main indicator light goes off.)* | ECM (for 2GR-FE) | |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | |
| SFI system (for 2GR-FE) | ||
| ECM (for 2GR-FE) | ||
| The cruise main indicator light remains blinking. | TC and CG terminal circuit | |
| ECM (for 2GR-FE) | ||
| 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 | ||
| Millimeter wave radar sensor | ||
| Driving support ECU | ||
| ECM (for 2GR-FE) | ||
| Alarm buzzer does not sound. | Skid control buzzer circuit | |
| Vehicle stability control system | ||
| Millimeter wave radar sensor | ||
| Driving support ECU | ||
| No brake control (when decelerating) | Vehicle stability control system | |
| Driving support ECU | ||
| ECM (for 2GR-FE) | ||
| The "SET" indicator does not come on (SET function operates normally) | Combination meter assembly | |
| ECM (for 2GR-FE) |
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*: w/ Shift Paddle Switch