Output Signals

All vehicles are equipped with different combinations of engine control components. Not all components are used on all models. To determine control (output) usage on specific models, see WIRING DIAGRAMS article. The available output signals from the ECU include the following. For theory and operation of specific output components, refer to system indicated in brackets.

• Airflow Meter Self-Cleaning (Hot-Wire Input Device)
• Air Induction Valve Control (Emission)
• Air Regulator Control (Idle Speed)
• Auxiliary Air Control Valve (Idle Speed)
• Canister Purge Control (Emission)
• EGR Control (Emission)
• Titania Exhaust Gas Sensor (Heating Element Input Device)
• Fuel Injector(s) (Fuel Control)
• Fuel Pressure Regulator (Fuel Control)
• Fuel Pump Control (Fuel Delivery)
• Idle Speed Control (Idle Speed)
• Mixture Heater (Emission)
• Power Solenoid (Induction)
• Swirl Combustion Valve Solenoid (Induction)
• Power Transistor(s) & Ignition Coil(s) (Ignition)
• Pressure Regulator Control (Fuel Delivery)
• Self-Diagnostics (Self-Diagnostics)
• Spark Plug Switching Control (Emission)