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Power Supply And Ground Circuit: Wiring Diagram

Fig 1: Power Supply & Ground Circuit Wiring Diagram
G08275288Courtesy 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)
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 - 1.0 V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
Battery voltage (11 - 14 V)
93 O Ignition switch [Ignition switch: OFF]  0 V
[Ignition switch: ON]  Battery voltage (11 - 14 V)
105 G Power supply for ECM [Ignition switch: ON]  Battery voltage (11 - 14 V)
108 B ECM ground [Engine is running] 
  • Idle speed
Body ground