Diagnostic Procedure

CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Remove engine coolant temperature sensor.
3. Check resistance between engine coolant temperature sensor terminals under the following conditions.
  
  Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : INSPECTION END.
2. NG : Replace engine coolant temperature sensor.