DTC P0111: Intake Air Temperature Circuit Range/Performance
- OUTLINE OF DIAGNOSIS
Detect the malfunction of intake air temperature sensor output property.
Judge NG when the intake air temperature is not varied whereas it seemed to be varied from the viewpoint of engine condition.
- COMPONENT DESCRIPTION
- ENABLE CONDITION ENABLE CONDITION CHART
Secondary Parameters Enable Conditions Coolant temp, before engine start < 30°C (86°F) Coolant temperature > 75°C (167°F) Battery voltage "GREATER THAN EQUAL TO" 0.9 V Continuous time when the vehicle speed is less than 50 km/h (31 MPH) 600 seconds or more - GENERAL DRIVING CYCLE
Perform the diagnosis when the vehicle speed condition is completed after idling from starting the cooled engine.
- DIAGNOSTIC METHOD
- Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 second.
Judgment Value
JUDGMENT VALUE CHARTMalfunction Criteria Threshold Value Output voltage difference between Max. and Min. < 20 mV (It is equal to approx. 0.5°C (33°F) around 25°.) Exhaust temperature above 500°C (932°F) 60 seconds or more Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge OK and clear the NG when the malfunction criteria below are completed.
Judgment Value
JUDGMENT VALUE CHARTMalfunction Criteria Threshold Value Output voltage difference between Max. and Min. "GREATER THAN EQUAL TO" 0 mV
- Abnormality Judgment
- DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed
- MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed
- FAIL SAFE
Intake air temperature sensor process: Intake air temperature is fixed at 20°C (68°F).
- ECM OPERATING AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)