Diagnostic Method
Judge as NG when Diagnosis 1 or Diagnosis 2 is established.
Diagnosis 1
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value |
|---|---|
| |Intake air temperature (air flow sensor) 21 sec. after engine start - Engine coolant temperature at engine start| | More than value of Map1 |
| |Intake air temperature (air flow sensor) 21 sec. after engine start - Ambient air temperature 21 sec. after engine start| | More than value of Map2 |
Map1
TEMPERATURE SPECIFICATION
| Ambient temperature (°C (°F)) | -30 (-22) | 30 (86) | 45 (113) | 60 (140) |
|---|---|---|---|---|
| |Intake air temperature (air flow sensor) 21 sec. after engine start - Engine coolant temperature at engine start| (°C (°F)) | 12 (21.6) | 12 (21.6) | 22 (39.6) | 22 (39.6) |
Map2
TEMPERATURE SPECIFICATION
| Ambient temperature (°C (°F)) | -30 (-22) | 30 (86) | 45 (113) | 60 (140) |
|---|---|---|---|---|
| |Intake air temperature (air flow sensor) 21 sec. after engine start - Ambient air temperature 21 sec. after engine start| (°C (°F)) | 20 (36) | 20 (36) | 32 (57.6) | 32 (57.6) |
Diagnosis 2
Judge as NG when the following conditions are established.
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage difference between Max. and Min. | Less than 0.015 V (Equivalent to approximately 0.4°C (0.72°F) near 25°C (77°F)) |
Time needed for diagnosis: Less than 1 s
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.