WARNING: This page is about a different car, the 2012 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: GO TO 2.

YES-2: Without CONSULT: GO TO 3.

NO: Go to "DIAGNOSIS PROCEDURE ".
CHECK IGNITION SIGNAL FUNCTION
WITH CONSULT
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT.
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

Let engine idle.

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

ECM					Voltage signal
Cylinder	+		-
Cylinder	Connector	Terminal	Connector	Terminal
1	F111	12	E80	175	Courtesy of NISSAN NORTH AMERICA, INC.
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 ".

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.

Safety Warning

Component Function Check

Use the Manual With the Right Hardware

When to See a Mechanic