October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Circuit Description

Engine operates in open loop when first started. In open loop operation, PCM ignores oxygen sensor input and calculates air/fuel mixture based on inputs from Engine Coolant Temperature (ECT) sensor, throttle position sensor and mass airflow sensor. PCM will begin closed-loop fuel control when oxygen sensor signal is active enough and ECT sensor reaches a predetermined value. PCM expect to begin closed-loop fuel control within a specified amount of time.