Operation CHARM
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Nissan-Datsun
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2002
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Altima 2.5 SL L4-2.5L (QR25DE)
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Engine Control Module
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Description and Operation
Engine Control Module: Description and Operation
Component Description
The ECM consists of a microcomputer and connectors for signal input and output and for power supply. The ECM controls the engine.