Diagnosis Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Identifying Ground Connections Components
  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 .
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

Refer to "WIRING DIAGRAM ".

INSPECTION END