Malfunction Threshold
A malfunction is detected if the following conditions are present after the engine has stopped and the vehicle condition has been turned to the OFF (LOCK) mode for at least 6 hours before restarting the engine:
| Temperature difference between each sensor values | Malfunction judgment | |||
|---|---|---|---|---|
| ECT sensor 1 - ECT sensor 2 | IAT sensor 2 - ECT sensor 2 | ECT sensor 1 | IAT sensor 2 | ECT sensor 2 |
| Higher than 57 deg.F (32 deg.C) | Higher than 57 deg.F (32 deg.C) | Normal | Normal | Failure |
| From -43 deg.F (-24 deg.C) to 57 deg.F (32 deg.C) | Failure | Normal | Normal | |
| Lower than -43 deg.F (-24 deg.C) | Failure | Failure | Normal | |
| From -43 deg.F (-24 deg.C) to 57 deg.F (32 deg.C) | Higher than 57 deg.F (32 deg.C) | Normal | Failure | Normal |
| From -43 deg.F (-24 deg.C) to 57 deg.F (32 deg.C) | Normal | Normal | Normal | |
| Lower than -43 deg.F (-24 deg.C) | Normal | Failure | Normal | |
| Lower than -43 deg.F (-24 deg.C) | Higher than 57 deg.F (32 deg.C) | Failure | Failure | Normal |
| From -43 deg.F (-24 deg.C) to 57 deg.F (32 deg.C) | Failure | Normal | Normal | |
| Lower than -43 deg.F (-24 deg.C) | Normal | Normal | Failure | |
- When the IAT sensor 2 is normal 10 seconds after starting the engine, the IAT 2 sensor is used to detect malfunction in the IAT sensor 1.
| Temperature difference between each sensor values | Malfunction judgment |
|---|---|
| IAT sensor 1- IAT sensor 2 | ECT sensor 1 |
| Higher than 57 deg.F (32 deg.C) | Failure |
| From -43 deg.F (-24 deg.C) to 57 deg.F (32 deg.C) | Normal |
| Lower than -43 deg.F (-24 deg.C) | Failure |