Tech Tips
Use the table below to help determine the cause of the problem symptom. 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 | See page |
|---|---|---|
| The cruise control main switch cannot be turned on. | Cruise control switch circuit | |
| Cruise main indicator light circuit | ||
| Inspect VSC OFF switch | - | |
| No. 1 meter ECU sub-assembly | ||
| Meter display panel | ||
| Hybrid vehicle control ECU | ||
| Vehicle speed cannot be set (the cruise main indicator light on the combination meter illuminates when the main switch is turned on, but turns off when SET function is operating). | Cruise control switch circuit | |
| Hybrid vehicle control ECU | ||
| Vehicle speed cannot be set (the cruise main indicator light on the combination meter illuminates when the main switch is turned on, and remains illuminated when SET function is operating). | Cruise control switch circuit | |
| Stop light switch circuit | ||
| Electronically controlled brake system | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Inspect VSC OFF switch | - | |
| No. 1 meter ECU sub-assembly | ||
| Meter display panel | ||
| Hybrid vehicle control ECU | ||
| The cruise control is canceled while it is operating. | Cruise control switch circuit | |
| Stop light switch circuit | ||
| Electronically controlled brake system | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Transmission control switch circuit | ||
| Skid control ECU (for LHD) | ||
| Skid control ECU (for RHD) | ||
| Shift lever position sensor | ||
| No. 1 meter ECU sub-assembly | ||
| Meter display panel | ||
| Hybrid vehicle control ECU | ||
| Pulling back on the control main switch does not cancel the cruise control. | Cruise control switch circuit | |
| Hybrid vehicle control ECU | ||
| The cruise control is not canceled when vehicle speed drops below the low speed limit. | Electronically controlled brake system | |
| Skid control ECU (for LHD) | ||
| Skid control ECU (for RHD) | ||
| Hybrid vehicle control ECU | ||
| Depressing the brake pedal does not cancel the cruise control. | Stop light switch circuit | |
| Hybrid vehicle control ECU | ||
| Moving the shift lever does not cancel the cruise control. (The cruise main indicator light remains on.) | Hybrid vehicle control system | |
| Shift lever position sensor | ||
| Transmission floor shift assembly | ||
| Hybrid vehicle control ECU | ||
| Operating the transmission shift switch does not cancel the cruise control. (w/ Shift Paddle Switch) | Hybrid vehicle control system | |
| Shift paddle switch circuit | ||
| Hybrid vehicle control ECU | ||
| Hunting (Speed is not constant.) | Hybrid vehicle control system | |
| SFI system | ||
| Electronically controlled brake system | ||
| Hybrid vehicle control ECU | ||
| Cruise set indicator light does not illuminate | Cruise SET indicator light circuit | |
| Cruise control switch circuit | ||
| No. 1 meter ECU sub-assembly | ||
| Meter display panel | ||
| Hybrid vehicle control ECU | ||
| Cruise control cannot be canceled | Inspect VSC OFF switch | - |
| Both VSC and TRC are turned off | - |