Control Unit
The Engine Control Module (ECM) monitors engine conditions through various input sensors, and controls engine operation through use of output signals to control various systems such as fuel, air injection, ignition, turbo control, and knock control systems. Turbo operation is controlled by turbo pre-control, turbo control, wastegate control, charge control and charge relief solenoid valves which are all controlled by ECM.
NOTE:
Components are grouped into 2 categories. The first category covers INPUT DEVICES, which control or produce voltage signals monitored by the ECM. The second category covers OUTPUT SIGNALS, which are components controlled by the ECM.