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 | See page |
|---|---|---|
| Main switch cannot be turned on (CRUISE main indicator on combination meter does not illuminate) | Cruise control switch circuit | |
| Cruise main indicator circuit | ||
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| SET not occurring or CANCEL occurring (DTC is not output) | Cruise control switch circuit | |
| Combination meter | ||
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Actual vehicle speed deviates above or below set speed | Vehicle stability control system | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Cruise control not canceled when brake pedal is depressed | Stop light switch circuit | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Cruise control not canceled when clutch pedal is depressed | Check for DTC C13B1/63 (Electric parking brake system) | |
| CAN communication system | ||
| Electric parking brake ECU | ||
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Control switch does not operate (-SET, +RES, CANCEL not possible) | Cruise control switch circuit | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Speed setting cannot be canceled (CANCEL function fails) | Cruise control switch circuit | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| SET possible at 40 km/h (25 mph) or less, or CANCEL does not operate | Vehicle stability control system | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Poor response in ACCEL and RESUME modes | Cruise control switch circuit | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| DTC memory is cleared | ECM (for 1WW) | |
| ECM (for 2WW) | ||
| DTC is not output, or is output when it should not be | TC and CG terminal circuit | |
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| CRUISE main indicator light does not illuminate | Cruise main indicator circuit | |
| Combination meter | ||
| CAN communication system | ||
| ECM (for 1WW) | ||
| ECM (for 2WW) | ||
| Cruise control SET indicator light does not illuminate (SET function operates normally) | Cruise SET indicator light circuit | |
| Combination meter assembly | ||
| CAN communication system | ||
| ECM (for 1WW) | ||
| ECM (for 2WW) |