Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to "Ground Inspection ".
  
  Fig 1: Ground Locations
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 EVAP Control System Pressure Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check sensor harness connector for water.
  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 ".

Refer to "Wiring Diagram ".
1. : INSPECTION END