5. Check Injector Output Signal Circuit For Open And Short

WARNING: This page is about a different car, the 2004 Infiniti M45. 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 Harness Continuity Between Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.

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 short to power in harness or connectors.