Engine Warm-up Mode

The ECU receives inputs from the CTS, MAT, MAP, speed, and knock sensors. It also is informed of throttle, gear (automatic transaxle models) and A/C control position.

The ECU provides a ground for the injector, precisely controlling fuel delivery to the engine. The ECU also controls ignition timing, engine idle speed and throttle stop angle. On vehicles with manual transmissions, the up-shift indicator lamp is controlled according to engine speed and load.