Diagnostic Method
Judge as NG when Diagnosis 1 or Diagnosis 2 becomes NG.
Diagnosis 1
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgment Value
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value |
|---|---|
| Intake air temperature (air flow sensor) 30 sec. after engine start - Engine coolant temperature at engine start | > Value of Map 1 |
| Intake air temperature (air flow sensor) 30 sec. after engine start - Ambient air temperature 30 sec. after engine start | > Value of Map 2 |
Map 1
TEMPERATURE SPECIFICATION - MAP 1
| Ambient air temperature °C (°F) | -30 (-22) | 30 (86) | 45 (113) | 60 (140) |
| Intake air temperature (air flow sensor) 30 sec. after engine start - Engine coolant temperature at engine start °C (°F) | 12 (21.6) | 12 (21.6) | 22 (39.6) | 22 (39.6) |
Map 2
TEMPERATURE SPECIFICATION - MAP 2
| Ambient air temperature °C (°F) | -30 (-22) | 30 (86) | 45 (113) | 60 (140) |
| Intake air temperature (air flow sensor) 30 sec. after engine start - Ambient air temperature 30 sec. after engine start °C (°F) | 20 (36) | 20 (36) | 32 (57.6) | 32 (57.6) |
Time Needed for Diagnosis: Less than 1 second
Diagnosis 2
Judge as NG when the following conditions are established.
Judgment Value
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage difference between Max. and Min. | < 0.02 V (Equivalent to approximately 0.5°C (0.9°F) near 25°C (77°F)) |
Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.