Component Function Check

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

1. PERFORM COMPONENT FUNCTION CHECK-I

   Without CONSULT-III 

   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. Check the voltage between ECM harness connector terminals under the following conditions.
      Fig 1: Checking Voltage Between ECM Harness Connector Terminals

      Courtesy of NISSAN MOTOR CO., U.S.A.
      VOLTAGE REFERENCE CHART
      
      

      DTC	ECM			Condition	Voltage
      	Connector	+	-
      		Terminal	Terminal
      P0139	F13	33 [HO2S2 (bank 1) signal]	35 (Sensor ground)	Revving up to 4, 000 RPM under no load at least 10 times	A change of voltage should be more than 0.24 V for 1 second during this procedure.
      P0159		34 [HO2S2 (bank 2) signal]

      Is the inspection result normal? 

      YES >> INSPECTION END

      NO >> GO TO 2.

2. PERFORM COMPONENT FUNCTION CHECK-II

   Check the voltage between ECM harness connector terminals under the following conditions.

   Fig 2: Checking Voltage Between ECM Harness Connector Terminals

   Courtesy of NISSAN MOTOR CO., U.S.A.
   VOLTAGE REFERENCE CHART
   
   

   DTC	ECM			Condition	Voltage
   	Connector	+	-
   		Terminal	Terminal
   P0139	F13	33 [HO2S2 (bank 1) signal]	35 (Sensor ground)	Keeping engine at idle for 10 minutes	A change of voltage should be more than 0.24 V for 1 second during this procedure.
   P0159		34 [HO2S2 (bank 2) signal]

   Is the inspection result normal? 

   YES >> INSPECTION END

   NO >> GO TO 3.

3. PERFORM COMPONENT FUNCTION CHECK-III

   Check the voltage between ECM harness connector terminals under the following conditions.

   Fig 3: Checking Voltage Between ECM Harness Connector Terminals

   Courtesy of NISSAN MOTOR CO., U.S.A.
   VOLTAGE REFERENCE CHART
   
   

   DTC	ECM			Condition	Voltage
   	Connector	+	-
   		Terminal	Terminal
   P0139	F13	33 [HO2S2 (bank 1) signal]	35 (Sensor ground)	Coasting from 80 km/h (50 MPH) in D position	A change of voltage should be more than 0.24 V for 1 second during this procedure.
   P0159		34 [HO2S2 (bank 2) signal]

   Is the inspection result normal? 

   YES >> INSPECTION END

   NO >> Go to "DIAGNOSIS PROCEDURE ".