Diagnosis Procedure
- CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check engine coolant temperature sensor. Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 2.
NO: 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 that the engine coolant does not flow.
Is the inspection result normal?
YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".
NO: Repair or replace thermostat. Refer to "EXPLODED VIEW ".