Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.
  
  Fig 1: Locating Ground Screws
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Refer to GROUND INSPECTION .
  
  OK or NG
  1. OK: GO TO 2.
  2. NG: Repair or replace ground connections.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor harness connector.
  
  Fig 2: Disconnecting Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check sensor harness connector for water.
  1. Water should not exist.
  OK or NG
  1. OK: GO TO 3.
  2. NG: Repair or replace harness connector.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 4.
2. NG: Replace EVAP control system pressure sensor.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

For wiring diagram, refer to WIRING DIAGRAM .
1. INSPECTION END