Sentra L4-1597cc 1.6L DOHC MFI (GA16DE) (1991)
Ignition Coil: Description and Operation
Ignition Coil
The Ignition Coil, located on the left side of the cylinder head, uses the principle of mutual induction to step up battery (low) voltage to ignition (high)
voltage. The Ignition Coil contains two sets of copper wire windings around a soft iron core. The primary winding is made of a hundred or so turns of a
heavy gage wire. It is connected to the battery (through the ignition switch) so that current flows through it, thus creating a magnetic field. When current
flow in the primary winding is stopped (by the power transistor), the collapse of the magnetic field causes a voltage to be induced in the secondary
windings. The ratio of turns in the primary windings to the number of turns in the secondary windings determines the voltage multiplication. This system
utilizes one ignition coil.