5. Check Injector Output Signal Circuit For Open And Short

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
   Fig 1: Checking Injector Output Signal Circuit For Open & Short

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Continuity should exist. 
4. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO 6.

NG: Repair open circuit or short to ground or shot to power in harness or connectors.