Circuit Description

This test monitors ECT sensor after timer reaches 4.25 minutes. The PCM looks at the test condition every second and increments the timer each time the test conditions are met. After 4.25 minutes, and if ECT drops to less than 41°F (5°C) for 3 seconds, DTC will set. If ECT is greater than 41°F (5°C), the test will be considered passed regardless of timer. The timer will decrement if the PCM is disabling fuel to any cylinder during traction control maneuvers, acceleration reduction, torque management, etc. The timer will reset only when the engine stops running.