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Home >> Nissan-Datsun >> 2004 >> Altima SE, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control System - 3.5L >> Ignition Signal >> Component Description >> Ignition Coil & Power Transistor >> Notes
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Ignition Coil & Power Transistor: Notes

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.