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 Harness Continuity Between Terminals

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

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 6.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.