Component Function Check

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM-ENGINE CONTROL SYSTEM- ".

1. PERFORM COMPONENT FUNCTION CHECK

   Without CONSULT 

   1. Start engine and warm it up to the normal operating temperature.
   2. Turn ignition switch OFF and wait at least 10 seconds.
   3. Turn ignition switch ON.
   4. Turn ignition switch OFF and wait at least 10 seconds.
   5. Start engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
   6. Let engine idle for 1 minute.
   7. Open engine hood.
   8. Check the voltage between ECM harness connector terminals under the following conditions.
      Fig 1: Checking Voltage Between ECM Harness Connector Terminals (Under No Load Condition)

      Courtesy of NISSAN NORTH AMERICA, INC.

      DTC	ECM			Condition	Voltage (V)
      	Connector	+	-
      		Terminal	Terminal
      P0420	F13	33 [HO2S2 (bank 1) signal]	35 (Sensor ground)	Keeping engine speed at 2, 500 RPM constant under no load	The voltage fluctuation cycle takes more than 5 seconds. 1 cycle: 0.6 - 1.0 → 0 - 0.3 → 0.6 - 1.0
      P0430		34 [HO2S2 (bank 2) signal]

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Go to "DIAGNOSIS PROCEDURE ".