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 switch (ON-OFF button). | Cruise control switch circuit | Click here |
| Cruise main indicator light circuit | Click here | |
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | Click here | |
| Vehicle speed cannot be set (the cruise control indicator illuminates when the cruise control system is turned on using the cruise control switch (ON-OFF button), but the cruise control indicator goes out when the cruise control switch is pushed to -/SET). | Cruise control switch circuit | Click here |
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Vehicle speed cannot be set (the cruise control indicator illuminates when the cruise control system is turned on using the cruise control switch (ON-OFF button), and it remains illuminated when the cruise control switch is pushed to -/SET). | Stop light switch circuit | Click here |
| Vehicle speed sensor circuit | ||
| Cruise control switch circuit | Click here | |
| Hybrid control system | ||
| Electronically controlled brake system | ||
| CAN communication system | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Vehicle speed control by the cruise control system is automatically canceled after it has started. | Stop light switch circuit | Click here |
| Hybrid control system | ||
| Electronically controlled brake system | ||
| CAN communication system | ||
| Cruise control switch circuit | Click here | |
| Vehicle speed sensor circuit | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Pulling back on the cruise control switch does not cancel vehicle speed control by the cruise control system. (The cruise control indicator remains illuminated.) | Cruise control switch circuit | Click here |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Pulling back on the cruise control switch does not cancel vehicle speed control by the cruise control system. (The cruise control indicator goes out.) | Hybrid vehicle control ECU assembly (for RHD) | |
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Vehicle speed control by the cruise control system is not canceled when vehicle speed drops below the low speed limit. (The cruise control indicator remains illuminated.) | Vehicle speed sensor circuit | |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Vehicle speed control by the cruise control system is not canceled when vehicle speed drops below the low speed limit. (The cruise control indicator goes out.) | Hybrid vehicle control ECU assembly (for RHD) | |
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Depressing the brake pedal does not cancel vehicle speed control by the cruise control system. (The cruise control indicator remains illuminated.) | Stop light switch circuit | Click here |
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Depressing the brake pedal does not cancel vehicle speed control by the cruise control system. (The cruise control indicator goes out.) | Hybrid vehicle control ECU assembly (for RHD) | |
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Moving the shift lever does not cancel vehicle speed control by the cruise control system. (The cruise control indicator remains illuminated.) | Hybrid control system | |
| Shift lever position sensor | ||
| Combination meter assembly | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Moving the shift lever does not cancel vehicle speed control by the cruise control system. (The cruise control indicator goes out.) | Hybrid vehicle control ECU assembly (for RHD) | |
| Hybrid vehicle control ECU assembly (for LHD) | ||
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | |
| SFI system | ||
| Hybrid control system | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) | ||
| The cruise control SET indicator does not illuminate. (Vehicle speed can be set) | Cruise SET indicator light circuit | Click here |
| Combination meter assembly | ||
| CAN communication system | ||
| Hybrid vehicle control ECU assembly (for RHD) | ||
| Hybrid vehicle control ECU assembly (for LHD) |