| DTC Strategy |
|
- Poor connection or damaged harness
- Faulty IAT sensor
|
| Enable Conditions |
Case 1 |
- Engine running
- Battery voltage
- Failure not detected for DTC
- Engine Coolant Temperature
- Coolant temperature at engine start - coolant temperature at engine at pervious driving cycle
- Cumulative time for IAT signal increase check (low load driving condition: air flow <20kg/h and vehicle speed <12.4 mile/hour)
- Cumulative time for IAT signal decrease check (high load driving condition: air flow 40kg/h and vehicle speed > 24.8 mile/hour
|
| Case 2 |
- Ignition "ON"
- Battery voltage ≥ 6V
- No Intake Air Temp. (IAT) sensor electrical error
|
| Threshold Value |
Case 1 |
- Intake air temperature signal vatiation since Engine start <Threshold versus Air temperature at start (35.6F... 104F)
- Low start intake air temperature: failure if IAT variation <34.7F
- Middle start intake air temperature: failure if IAT variation <34.7F
- High start intake air temperature: failure if IAT variation <68F
|
| Case 2 |
- IAT - IAT moving mean value > 46.4F
|
| Diagnostic Time |
Case 1 |
|
| Case 2 |
|
| MIL On Condition |
|