Mode I

This is normal operating mode. In this mode, the CHECK ENGINE light and Red Light Emitting Diode (LED) inspection light in ECU stay on when the ignition is turned on, engine off (bulb check). If the engine is started, CHECK ENGINE light and Red LED in ECU should turn off, unless a fault or trouble code is present (Calif. models) or if the ECU or crank angle sensor is malfunctioning (Calif. and Fed. models).