| Main Action |
|
- Poor connection or damaged harness
- Faulty IAT sensor
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| Case 1 |
Prerequisite condition |
- Engine speed during engine start is higher than 640 rpm to 960 rpm.
- Battery voltage is between 11V and 16V
- Engine Coolant Temperature (ECT) is higher than 74°C (165.2°F).
- Engine stop time is longer than 10 minutes.
|
| Threshold value |
- Signal is stuck.
- Intake air temperature signal variation since engine starts is lower than 1.5°C (34.7°F).
|
| Diagnosis Time |
|
| Case 2 |
Prerequisite condition |
- Battery voltage is between 6V and 16V
|
| Threshold value |
- Noisy signal is detected.
- Absolute value of difference between IAT and IAT moving mean value is higher than 8.25°C (46.9°F).
|
| Diagnosis Time |
|
| Case 3 |
Prerequisite condition |
- Battery voltage is between 6V and 16V.
- Engine stop time is longer than 480 min.
- Engine Coolant Temperature (ECT) drop after starting is lower than 1.4°C (34.5°F) within 15 seconds.
|
| Threshold value |
- Deviation between IAT and 2 other temperature sensors (ECT, AAT or EOT) is higher than 20°C (68°F) and Deviation among other temperature sensors (ECT, AAT, EOT) is lower than or equal to 20°C (68°F).
|
| Diagnosis Time |
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| MIL On Condition |
|