Diagnostic Procedure

CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 2.
2. NG: Replace engine coolant temperature sensor.
CHECK THERMOSTAT OPERATION
When the engine is cooled [lower than 75°C (167°F)], grasp lower radiator hose and confirm the engine coolant does not flow.

OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace thermostat. Refer to "THERMOSTAT AND THERMOSTAT HOUSING ".
CHECK INTERMITTENT INCIDENT
Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END