| DTC Strategy |
Case1 |
- Rationality check, high side
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- Poor connector connection
- Short to ground in harness
- IATS
- ECM
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| Case2 |
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| Case3 |
- Check ECT, IAT, AAT Correlation
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| Case4 |
- Monitor at cold condition
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| Enable Conditions |
Case1, 2 |
- (A) Vehicle speed is greater than 50 km/h (31 mph)
- (B) Air mass flow is at between 24 kg/h and 300 kg/h
- Time after (A) + (B) is greater than 8s
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| Case3 |
When ECT at start is less than 40°C and condition for high intake air temperature
- Vehicle speed is greater than 4.8 km/h (3 mph)
- ECT is higher than 70°C (158°F)
- Air mass flow is less than 16 kg/h
- Integrated air mass is greater than 20 kg
- Duration of condition is for more than 18s
- Total number of condition is more than 5 times
When ECT at start is less than 40°C and condition for low intake air temperature
- Vehicle speed is greater than 4.8 km/h (3 mph)
- ECT is higher than 31°C (87.8°F)
- Air mass flow is between 24 kg/h and 300 kg/h
- Duration of condition is for more than 8s
- Total number of condition is more than 2 times
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| Case4 |
- Soaking time engine stop at ECT 0°C is greater than 5h
- Engine stop at ECT 90°C (194°F) is greater than 7h
- Block heater: Not detected
- ECT is less than 50.25°C (122.45°F)
- Difference of ECT and ECT at Start is less than 2.25°C (36.05°F)
- Time after engine start 30s
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| Threshold Value |
Case1 |
- Intake Air Temperature is greater than 110°C (230°F)
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| Case2 |
- Absolute value of difference of raw IAT and filtered IAT is greater than 0.498V
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| Case3 |
- IAT deviation of more than 1.5°C (34.7°F)
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| Case4 |
- Absolute value of difference of Reference temp and IAT is greater than 20°C (68°F)
* Ref temp: 2 of 3 Signals are selected and averaged, and the other Signal which has the biggest deviation is excluded |
| Diagnostic Time |
Case1 |
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| Case2 |
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| Case3, 4 |
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| MIL ON Condition |
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