LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2009 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing - G37 Coupe >> Ignition Signal >> Component Function Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Function Check

  1. INSPECTION START

    Turn ignition switch OFF, and restart engine.

    Does the engine start? 

    YES-1: With CONSULT-III: GO TO 2.

    YES-2: Without CONSULT-III: GO TO 3.

    No: Go to "DIAGNOSIS PROCEDURE ".

  2. CHECK IGNITION SIGNAL FUNCTION

    With CONSULT-III 

    1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
    2. Make sure that each circuit produces a momentary engine speed drop.

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

  3. CHECK IGNITION SIGNAL FUNCTION

Without CONSULT-III 

  1. Let engine idle.
  2. Read the voltage signal between ECM harness connector terminals under the following conditions with an oscilloscope.
VOLTAGE REFERENCE

ECM Voltage signal
+ -
Connector Terminal Connector Terminal
F101 11 M107 128
G04886600Courtesy of NISSAN MOTOR CO., U.S.A.
12
15
16
19
20
NOTE: The pulse cycle changes depending on RPM at idle.

Is the inspection result normal? 

YES: INSPECTION END

NO: Go to "DIAGNOSIS PROCEDURE ".