Diagnosis Procedure

1. CHECK GROUND CONNECTION
   1. Turn ignition switch OFF.
   2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

2. CHECK ENGINE COOLANT TEMPERATURE SENSOR

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Replace engine coolant temperature sensor. Refer to "EXPLODED VIEW ".

3. 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.

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Repair or replace thermostat. Refer to "REMOVAL AND INSTALLATION ".

4. CHECK INTERMITTENT INCIDENT

   Refer to "INTERMITTENT INCIDENT ".

INSPECTION END