Engine Warm-Up Mode

The ECU receives inputs from the CTS and knock sensor (1.7L), MT (1.4L), MAT, MAP, and speed sensor. It also is informed of throttle, gear (auto. trans.), and A/C control position.

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