Power Supply And Ground Circuit: Wiring Diagram

NOTE: For references to "PG-Power", see POWER SUPPLY, GROUND & CIRCUIT ELEMENTS article.

Fig 1: Power Supply And Ground Circuit Diagram

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.

VOLTAGE REFERENCE CHART

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
10 11	B B	ECM ground	[Engine is running] Idle speed	Body ground
32	P	ECM relay (Self shut-off)	[Engine is running] [Ignition switch: OFF] For a few seconds after turning ignition switch OFF	0 - 1.0V
32	P	ECM relay (Self shut-off)	[Ignition switch: OFF] More than a few seconds after turning ignition switch OFF	BATTERY VOLTAGE (11 - 14V)
93	O	Ignition switch	[Ignition switch: OFF]	0V
93	O	Ignition switch	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14V)
105	G	Power supply for ECM	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14V)
108	B	ECM ground	[Engine is running] Idle speed	Body ground