Outline Of Diagnosis
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Detect malfunctions of the thermostat function.
Judge as NG when any one of the following conditions is established.
- Actual engine coolant temperature does not reach the highest temperature which is necessary to perform other OBDII diagnoses. (Judgment 1)
- Actual engine coolant temperature is not within the range of the regulated temperature to -11 °C (-19.8°F). (Judgment 2)
- Difference between the estimated engine coolant temperature and actual engine coolant temperature exceeds the specified value. (Judgment 3)