Malfunction Threshold

A malfunction is detected if these three conditions are present after the engine and the ignition switch have been off for at least 6 hours:

• When the temperature difference between the IAT and ECT1 is 57°F (32°C) or more.
• When the temperature difference between the IAT and ECT2 is 30°F (17°C) or more.
• When the temperature difference between the ECT2 and ECT1 is 73°F (41°C) or more.