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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing (Qr25DE) >> Ignition Signal >> Component Description >> Ignition Coil&Power Transistor

Ignition Coil&Power Transistor

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The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.