2007 Infiniti M45FACTORY OEM SERVICE PROCEDURE

Component Description: Wiring Diagram

For PG, go to POWER SUPPLY, GROUND & CIRCUIT ELEMENTS .

Fig 1: EC-IGNSYS-01 - Wiring Diagram
G05211152Courtesy 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.
SPECIFICATION DATA REFERENCE

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

For PG, go to POWER SUPPLY, GROUND & CIRCUIT ELEMENTS .

Fig 2: EC-IGNSYS-02 - Wiring Diagram
G05211153Courtesy of NISSAN NORTH AMERICA, INC.

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.
SPECIFICATION DATA REFERENCE

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
46
60
61
62		 L/O
V/W
P
Y/R		 Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900803Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900804Courtesy of NISSAN NORTH AMERICA, INC.
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

For PG, go to POWER SUPPLY, GROUND & CIRCUIT ELEMENTS .

Fig 3: EC-IGNSYS-03 - Wiring Diagram
G05211156Courtesy of NISSAN NORTH AMERICA, INC.

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.
SPECIFICATION DATA

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
65
79
80
81		 BR/R
GR/R
GR/B
G/R		 Ignition signal No. 8
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900803Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900804Courtesy of NISSAN NORTH AMERICA, INC.
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.