Output Signals

The control unit processes information from the input signals and sends appropriate voltage control signals to the following engine controls. For theory and operation of specific output components, refer to system indicated in brackets.

• "CHECK ENGINE" Light (Self-Diagnostics)
• EFI Main Relay (Control Unit)
• EGR Solenoid (Emissions)
• Fuel-Cut System (Fuel Control)
• Fuel Pump Relay (Fuel Delivery)
• Idle Speed Control (ISC) Solenoid (Idle Speed)
• Injector(s) (Fuel Control)
• PTC (Mixture Heater) Relay (Emissions)
• Purge Solenoid (Emissions)