Direct Ignition System (300ZX)
NOTE:
All models use a Light Emitting Diode (LED) crank angle sensor. For additional information on operation see INPUT DEVICES.
The direct ignition system uses one coil per cylinder. Individual coils are plugged directly onto spark plugs. See Fig 1. No conventional distributor or high tension wires are used. A crank angle sensor (mounted on front of left side exhaust camshaft) monitors engine speed and piston location. Signals created by the crank angle sensor are sent to the Electronic Control Unit (ECU) for processing. ECU then delivers ignition signals to the power transistor to control ignition by triggering the appropriate ignition coil. Power for ignition coils is supplied from ignition switch through the power transistor relay.