Ignition Signal: Wiring Diagram

WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - EC-IGNSYS-01

Courtesy 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.

ON BOARD DIAGNOSTIC LOGIC

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
111	BR	ECM relay (Self shut-off)	[Engine is running] [Ignition switch: OFF] For a few seconds after turning ignition switch OFF	0 - 1.5V
111	BR	ECM relay (Self shut-off)	[Ignition switch: OFF] More than a few seconds passed after turning ignition switch OFF	BATTERY VOLTAGE (11 - 14V)
119 120	R P	Power supply for ECM	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14V)

Fig 2: Wiring Diagram - EC-IGNSYS-02

Courtesy 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 3: Pulse Signal Table

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Wiring Diagram - EC-IGNSYS-03

Courtesy 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 5: Pulse Signal Table

Courtesy of NISSAN MOTOR CO., U.S.A.