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Section 237 (Engine Control System): Injector: Wiring Diagram

WARNING: This page is about a different car, the 2004 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Displaying Wiring Diagram (EC-INJECT-01)
G00787495Courtesy of NISSAN MOTOR CO., U.S.A.

ECM TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL AND GROUND. 

CAUTION: DO NOT USE ECM GROUND TERMINALS WHEN MEASURING INPUT/OUTPUT VOLTAGE. DOING SO MAY RESULT IN DAMAGE TO THE ECM'S TRANSISTOR. USE A GROUND OTHER THAN ECM TERMINALS, SUCH AS THE GROUND.
Fig 2: Displaying ECM Terminals And Reference Values
G00787496Courtesy of NISSAN MOTOR CO., U.S.A.