6. Check Ignition Spark

1. Turn ignition switch OFF.
2. Disconnect all injector harness connectors.
3. Disconnect ignition coil assembly from rocker cover.
4. Connect a known-good spark plug to the ignition coil assembly.
5. Place end of spark plug against a suitable ground and crank engine.
6. Check for spark.

OK or NG 

1. OK: GO TO 7.
2. NG: Check ignition coil with power transistor and their circuit. Refer to "IGNITION SIGNAL ".

Fig 1: Checking Spark

Courtesy of NISSAN MOTOR CO., U.S.A.