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Ignition Signal: Wiring Diagram

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wiring Diagram - Ignition Signal - EC-IGNSYS-01
G02402156Courtesy of NISSAN MOTOR CO., U.S.A.

Specification data are reference values and are 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: Terminal DC Voltage Specification
G02402157Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Wiring Diagram - Ignition Signal - EC-IGNSYS-02
G02402158Courtesy of NISSAN MOTOR CO., U.S.A.

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT-II.

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 4: Terminal DC Voltage Specification
G02402159Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 5: Wiring Diagram - Ignition Signal - EC-IGNSYS-03
G02402160Courtesy of NISSAN MOTOR CO., U.S.A.

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT-II.

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 6: Terminal DC Voltage Specification
G02402161Courtesy of NISSAN MOTOR CO., U.S.A.