3. Check Injector Power Supply Circuit

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 harness connectors F21, F201 (bank 1) and harness connectors F41, F221 (bank 2).

Fig 1: Identifying Harness Connectors F21, F201, F41 & F221
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between the following; harness connector F21 terminal 5 and ground, harness connector F41 terminal 5 and ground with CONSULT-II or tester.

Fig 2: Checking Voltage Between Harness Connector F21 Terminal 5 & Ground, & Harness Connector F41 Terminal 5 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Voltage: Battery voltage

OK or NG

OK: GO TO 5. CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT .
NG: GO TO 4.