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Home >> Chevrolet >> 1985 >> Chevette L4-98 1.6L >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Modes of Operation
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Modes of Operation


On "Minimum Function Systems" grounding ECM terminal 18 compensates for high altitude operation.