Note
Before replacing the hybrid vehicle control ECU, 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 (Meter circuit plate) | ||
| Hybrid vehicle control ECU | ||
| The cruise control SET indicator does not illuminate (Vehicle speed can be set) | CAN communication system | |
| Cruise SET indicator light circuit | ||
| Combination meter assembly (Meter circuit plate) | ||
| Hybrid vehicle control ECU | ||
| 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 | |
| Hybrid vehicle control ECU | ||
| 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 | ||
| Electronically controlled brake system | ||
| Hybrid control system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Combination meter assembly (Meter circuit plate) | ||
| Hybrid vehicle control ECU | ||
| Vehicle speed control by the cruise control system is automatically canceled after it has started | Inspect the fail-safe control list | |
| CAN communication system | ||
| Electronically controlled brake system | ||
| Hybrid control system | ||
| Cruise control switch circuit | ||
| Stop light switch circuit | ||
| Hybrid vehicle control ECU | ||
| Hunting (Speed is not constant) | Hybrid control system | |
| SFI system (w/o Canister pump module) | ||
| SFI system (w/ Canister pump module) | ||
| Hybrid vehicle control ECU | ||
| Pulling back on the cruise control main switch does not cancel vehicle speed control by the cruise control system | Cruise control switch circuit | |
| Hybrid vehicle control ECU | ||
| Vehicle speed control by the cruise control system is not canceled when vehicle speed drops below the low speed limit | Electronically controlled brake system | |
| Hybrid vehicle control ECU | ||
| Moving the shift lever does not cancel vehicle speed control by the cruise control system | Shift Lock Control Unit Assembly (Shift sensor) | |
| Hybrid vehicle control ECU | ||
| Depressing the brake pedal does not cancel vehicle speed control by the cruise control system | Stop light switch circuit | |
| Hybrid vehicle control ECU |