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Home >> Jeep >> 1981 >> CJ7 Base, 4.2L Eng VIN C, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computerized Emission Control >> Operation >> Micro Computer Unit (MCU) >> Notes
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Micro Computer Unit (MCU): Notes

The MCU is located in the engine compartment, on the left-hand inner fender panel. The MCU monitors the CEC system data sensors and, based upon mode of operation, generates an output control signal to the stepper motor, mounted in carburetor. The MCU allows the following 3 modes of operation: