Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Checking Ground Connection
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace ground connections.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to "Component Inspection ".

OK or NG
1. OK: GO TO 3.
2. 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
1. OK: GO TO 4.
2. NG: Repair or replace thermostat. Refer to "THERMOSTAT AND WATER PIPING ".
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

Refer to "WIRING DIAGRAM ".
1. : INSPECTION END