Component Function Check

Turn ignition switch OFF, and restart engine.

Does the engine start?

YES

With CONSULT: GO TO 2.

YES

Without CONSULT: GO TO 3.

NO

Proceed to Diagnosis Procedure .

With CONSULT

1. Perform "POWER BALANCE" in "Active Test" mode of "ENGINE".
2. Make sure that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

INSPECTION END

NO

Proceed to Diagnosis Procedure .

Without CONSULT

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

   ECM				Condition	Voltage signal
   +		-
   Connector	Terminal	Connector	Terminal
   F79	153	E32	204	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	Courtesy of NISSAN NORTH AMERICA, INC.
   	154
   	161
   	162
   	164
   	168

Is the inspection result normal?

YES

INSPECTION END

NO

Proceed to Diagnosis Procedure .