Component Function Check

WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

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 ".
CHECK IGNITION SIGNAL FUNCTION
WITH CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
2. Check that each circuit produces a momentary engine speed drop.
  Is the inspection result normal?
  
  YES: INSPECTION END
  
  NO: Go to "DIAGNOSIS PROCEDURE ".

CHECK IGNITION SIGNAL FUNCTION

WITHOUT CONSULT-III

Let engine idle.

Read the voltage signal between ECM harness connector terminals under the following conditions with an oscilloscope.

VOLTAGE SPECIFICATION

ECM					Voltage signal
Cylinder	+		-
Cylinder	Connector	Terminal	Connector	Terminal
1	F111	12	E80	175	Courtesy of NISSAN MOTOR CO., U.S.A.
2		13
3		14
4		15
5		17
6		18
7		19
8		20

NOTE: The pulse cycle changes depending on RPM at idle.

Is the inspection result normal?

YES: INSPECTION END

NO: Go to "DIAGNOSIS PROCEDURE ".