Problem Symptoms Table
HINT
- 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.
Cruise control system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | Refer to |
|---|---|---|
| Main switch cannot be turned ON (CRUISE main indicator on combination meter does not illuminate) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Cruise main indicator circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| Hybrid vehicle control ECU | REMOVAL | |
| SET not occurring or CANCEL occurring (DTC is not output) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Combination meter | REMOVAL | |
| Hybrid vehicle control ECU | REMOVAL | |
| Actual vehicle speed deviates above or below the set speed | Skid control ECU | REMOVAL |
| Hybrid vehicle control ECU | REMOVAL | |
| Gear shifting occurs frequently between 7th and O/D when driving with cruise control on | Skid control ECU | REMOVAL |
| Hybrid vehicle control ECU | REMOVAL | |
| Cruise control not canceled, even when brake pedal is depressed | Stop light switch circuit | DTC P0571 STOP LIGHT SWITCH CIRCUIT MALFUNCTION |
| Hybrid vehicle control ECU | REMOVAL | |
| Cruise control not canceled, even when transmission is shifted to N | Shift lever position sensor | INSPECTION |
| Hybrid vehicle control ECU | REMOVAL | |
| Control switch does not operate (-/SET, +/RES, CANCEL not possible) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Hybrid vehicle control ECU | REMOVAL | |
| Speed setting cannot be canceled (CANCEL function fails) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Hybrid vehicle control ECU | REMOVAL | |
| SET possible at 40 km/h (25 mph) or less, or CANCEL does not operate | Skid control ECU | REMOVAL |
| Hybrid vehicle control ECU | REMOVAL | |
| Poor response in ACCEL and RESUME modes | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Hybrid vehicle control ECU | REMOVAL | |
| O/D does not resume, even though road is not uphill | Skid control ECU | REMOVAL |
| Hybrid vehicle control ECU | REMOVAL | |
| DTC memory is erased | Hybrid vehicle control ECU | REMOVAL |
| DTC is not output, or is output when it should not be | TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| Hybrid vehicle control ECU | REMOVAL | |
| Cruise main indicator light does not illuminate | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Cruise main indicator circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| Combination meter | REMOVAL | |
| Hybrid vehicle control ECU | REMOVAL |