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: 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.

Terminal No.	Wire color	Item	Condition	Data (DC voltage)
11	B	ECM ground	[Engine is running] Idle speed	Body ground
32	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
32	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)
107 108 109 112	B B B B	ECM ground	[Engine is running] Idle speed	Body ground