April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Function Check

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
+		-
Connector	Terminal	Connector	Terminal
F101	11	M107	128	Courtesy 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 ".