Diagnosis Procedure

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

1. CHECK GROUND CONNECTION
   1. Turn ignition switch OFF.
   2. Check ground connection E9. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
   1. Disconnect EVAP control system pressure sensor harness connector.
   2. Check that water is not inside connectors.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness connector.

3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
   1. Turn ignition switch ON.
   2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

      EVAP control system pressure sensor		Ground	Voltage (V)
      Connector	Terminal
      B41	3	Ground	Approx. 5

      Fig 1: Checking Voltage Between EVAP Control System Pressure Sensor Harness Connector B41 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: GO TO 4.

4. CHECK SENSOR POWER SUPPLY CIRCUIT

   Check harness for short to power and short to ground, between the following terminals.

   ECM		Sensor
   Connector	Terminal	Name	Connector	Terminal
   F13	72	Refrigerant pressure sensor	E219	1
   	76	CKP sensor (POS)	F30	1
   E10	87	APP sensor	E40	6
   	91	EVAP control system pressure sensor	B41	3

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Repair short to ground or short to power in harness or connectors.

5. CHECK COMPONENTS

   Check the following.

   • Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ".)
   • Refrigerant pressure sensor (Refer to "DIAGNOSIS PROCEDURE ".)

     Is the inspection result normal? 

     YES: GO TO 6.

     NO: Replace malfunctioning components.

6. CHECK APP SENSOR

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO  9.

   NO: GO TO 7.

7. REPLACE ACCELERATOR PEDAL ASSEMBLY
   1. Replace accelerator pedal assembly. Refer to REMOVAL AND INSTALLATION .
   2. Go to "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

8. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 9.

   NO: Replace EVAP control system pressure sensor. Refer to "REMOVAL AND INSTALLATION ".

9. CHECK INTERMITTENT INCIDENT

   Refer to "INTERMITTENT INCIDENT ".

   : INSPECTION END