Federal Models

CIS-E Motronic Engine Management System:

The CIS-E Motronic Engine Management System consists of the basic CIS-E fuel injection system (Continuous Injection with Electronics) and a single electronic control unit (ECU) which is responsible for precise control of the air/fuel mixture, ignition timing point, idle stabilization, and evaporative emissions control.
The CIS-E Motronic control unit receives information from the:

^ A/C compressor, and the A/T selector switch
^ Air flow sensor plate potentiometer
^ Coolant temperature sensor
^ Hall sender
^ Idle switch
^ Ignition reference sensor
^ Oxygen sensor
^ Speedometer signal
^ Throttle valve potentiometer (A/T only)
^ Two knock sensors

The ECU processes these input signals and calculates the appropriate values for operation of the:

^ Cold start valve
^ Differential pressure regulator (air/fuel mixture regulation)
^ Evaporative emission solenoids
^ Fuel pump relay
^ Idle stabilizer valve
^ Ignition power output stage
^ On-Board diagnostics

The CIS-E Motronic system adjusts operating ranges for the air/fuel ratio, idle speed, and altitude changes automatically. Because of this "adaptive" quality, the need for periodic adjustments due to minor vacuum leaks, and normal engine wear is largely eliminated.
An On-board diagnostic system provides fault recognition and diagnosis for the Engine Management System. The E.C.U. monitors normal operating conditions, detects unusual values and other recognized faults, and stores the fault information in an eraseable permanent memory for later retrieval.