5. Check Injector Output Signal Circuit For Open And Short

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF.
Disconnect ECM harness connector.
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.
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.