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DIAGRAM 2: 1996, 1997, 1998 3.0L Nissan Quest
The above typical ignition system wiring diagram applies only to the 1996, 1997, 1998 3.0L Nissan Quest and Mercury Villager. It includes the following circuits: ignition coil, power transistor (ignition control module), and camshaft position sensor.
You can find the camshaft position sensor test explained in detail here: How To Test The Camshaft Position Sensor (1993-1998 3.0L Nissan Quest).
You can find the ignition coil and power transistor tests explained in detail here: How To Test The Ignition Coil And Power Transistor (1993-1998 3.0L Nissan Quest).