Power Supply And Ground Circuit: Wiring Diagram

Fig 1: Identifying Wiring Diagram With Connector End View (EC-MAIN-01)

Courtesy of NISSAN NORTH AMERICA, INC.

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

CAUTION: Never 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.

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
12 16	B B	ECM ground	[Engine is running] Idle speed	Body ground
24	R/G	ECM relay (Self shut-off)	[Engine is running] [Ignition switch: OFF] For a few seconds after turning ignition switch OFF	0 - 1.0 V
24	R/G	ECM relay (Self shut-off)	[Ignition switch: OFF] More than a few seconds after turning ignition switch OFF	BATTERY VOLTAGE (11 - 14 V)
93	B/R	Ignition switch	[Ignition switch: OFF]	0 V
93	B/R	Ignition switch	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
105	G	Power supply for ECM	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
107 108	B B	ECM ground	[Engine is running] Idle speed	Body ground
111 112	B B	ECM ground	[Engine is running] Idle speed	Body ground