Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Quest. 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 three ground screws on the body. Refer to , "GROUND INSPECTION ".
  
  Fig 1: Locating Body Ground Screws E24, E15, F9 And E133
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 2.

NG : Repair or replace ground connections.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to , "COMPONENT INSPECTION ".

OK or NG

OK : GO TO 3.

NG : Replace engine coolant temperature sensor.
CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70°C (158°F)] condition, grasp lower radiator hose and confirm the engine coolant does not flow.

OK or NG

OK : GO TO 4.

NG : Repair or replace thermostat. Refer to , "THERMOSTAT AND THERMOSTAT HOUSING ".
CHECK INTERMITTENT INCIDENT
Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

Refer to , "WIRING DIAGRAM ".

: INSPECTION END