2009 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Ignition Signal: Wiring Diagram

Fig 1: EC-IGNSYS-01 - Wiring Diagram
G05924182Courtesy of NISSAN MOTOR CO., U.S.A.

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 SPECIFICATION CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
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
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14 V)
105 G Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14 V)
Fig 2: EC-IGNSYS-02 - Wiring Diagram
G04926265Courtesy of NISSAN MOTOR CO., U.S.A.

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

Pulse signal is measured by CONSULT-III.

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 SPECIFICATION CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
9
10
11
21		 Y
BR/Y
V
G		 Ignition signal No. 3
Ignition signal No. 2
Ignition signal No. 1
Ignition signal No. 4		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 0 - 0.1 V(1)
G05924184Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 0 - 0.2 V(1)
G05921437Courtesy of NISSAN MOTOR CO., U.S.A.
(1) 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.