Note
Before replacing the ECM, refer to Service Bulletin.
Tech Tips
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| The cruise control system cannot be turned on using the cruise control main switch (ON/OFF button) (The cruise control indicator does not illuminate) | CAN communication system | |
| Cruise control indicator light circuit | ||
| Cruise control switch circuit | ||
| Combination meter assembly | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| The cruise control SET indicator does not illuminate (Vehicle speed can be set) | CAN communication system | |
| Cruise SET indicator light circuit | ||
| Combination meter assembly | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Vehicle speed cannot be set (The cruise control indicator illuminates when the cruise control system is turned on using the cruise control main switch (ON/OFF button), but the cruise control indicator turns off when the cruise control main switch is pushed to -SET) | Cruise control switch circuit | |
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Vehicle speed cannot be set (The cruise control indicator illuminates when the cruise control system is turned on using the cruise control main switch (ON/OFF button), and it remains illuminated when the cruise control main switch is pushed to -SET) | Inspect the fail-safe control list | |
| CAN communication system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Automatic transaxle system (U661E) | ||
| Automatic transaxle system (U661F) | ||
| Automatic transaxle system (U881E) | ||
| Automatic transaxle system (U881F) | ||
| Vehicle stability control system | ||
| Combination meter assembly | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Vehicle speed control by the cruise control system is automatically canceled after it has started | Inspect the fail-safe control list | |
| CAN communication system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Automatic transaxle system (U661E) | ||
| Automatic transaxle system (U661F) | ||
| Automatic transaxle system (U881E) | ||
| Automatic transaxle system (U881F) | ||
| Vehicle stability control system | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Hunting (Speed is not constant) | Automatic transaxle system (U661E) | |
| Automatic transaxle system (U661F) | ||
| Automatic transaxle system (U881E) | ||
| Automatic transaxle system (U881F) | ||
| SFI system (for 2GR-FKS) | ||
| SFI system (for 8AR-FTS) | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Pulling back on the cruise control main switch does not cancel vehicle speed control by the cruise control system | Cruise control switch circuit | |
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Vehicle speed control by the cruise control system is not canceled when vehicle speed drops below the low speed limit | Vehicle stability control system | |
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Moving the shift lever does not cancel vehicle speed control by the cruise control system | Park/Neutral position switch assembly (U661E) | |
| Park/Neutral position switch assembly (U661F) | ||
| Park/Neutral position switch assembly (U881E) | ||
| Park/Neutral position switch assembly (U881F) | ||
| Transmission floor shift assembly (U661E) | ||
| Transmission floor shift assembly (U661F) | ||
| Transmission floor shift assembly (U881E) | ||
| Transmission floor shift assembly (U881F) | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Vehicle speed control by the cruise control system is not canceled when the paddle shift switch is operated | Transmission shift switch circuit (U661F) | |
| Transmission shift switch circuit (U881F) | ||
| Transmission shift switch circuit (U661E) | ||
| Transmission shift switch circuit (U881E) | ||
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) | ||
| Depressing the brake pedal does not cancel vehicle speed control by the cruise control system | Stop light switch circuit | |
| ECM (for 2GR-FKS) | ||
| ECM (for 8AR-FTS) |