Enabling Conditions
| Overlap prohibited DTC | |
| Soak time | 21600 seconds or more |
| Engine Speed | 500 r/min or more |
| Block heater judgment | Complete |
| Block heater operation | Not operating |
| Block heater judgment Duration while rear oxygen sensor output voltage is less than 0.55 V |
500 r/min or more |
| When conditions are met, the state is judged as "Block heater is not operating". Σ (engine coolant temp. - engine coolant temp. at engine startup) |
-10°C (-18°F) or more |