Control Unit
The ECU receives and processes signals from data sensors and switches to control fuel delivery. The frequency and duration of injection (fuel delivery time) is controlled by ECU. Fuel delivery time is modified for such operating conditions as cold starting, altitude, acceleration and deceleration.
NOTE:
Components are grouped into 2 categories. The first category covers INPUT DEVICES, which control or produce voltage signals monitored by the ECU. The second category covers OUTPUT SIGNALS, which are components controlled by the ECU.