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Concord L6-258 4.2L VIN C 2-bbl (1982)

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Locations > Page 683

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Engine Control Module: Description and Operation

Fig 2 - CEC Wiring System Diagram. 1981 6-258

Fig 3 CEC System 1982 4-151

OPERATION

This unit is a microprocessor that monitors the oxygen sensor voltage and, based upon the mode of operation, generates an output control signal
for the carburetor stepper motor.
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If the system is in the closed loop mode of operation, the air/fuel mixture will he varied according to the oxygen content in the exhaust gas and
current engine operations.

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If the system is in the open loom mode of operation, the air/fuel ratio will be based on a predetermined value that is determined upon several
engine operating parameters.

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Locations > Page 683

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