Symptoms
|
Possible Causes
|
Remedy
|
Coolant
leakage
|
| •
|
From the thermostat
gasket | |
Check the
mounting bolts
|
| •
|
Check the torque of the mounting
bolts | |
| •
|
Retighten the bolts and check leakage
again. | |
Check the gasket
for damage
|
| •
|
Check gasket or seal for
damage | |
| •
|
Replace gaskets and reuse the
thermostat. | |
Cooled
excessively
|
| •
|
Low heater performance (cool air
blowed-out) |
| •
|
Temperature gauge indicates
'LOW' | |
Visually check
after removing the radiator cap.
|
| •
|
Insufficient coolant or
leakage. | |
| •
|
After refilling coolant,
recheck. | |
GDS
check&Starting engine
|
| •
|
Check connection of the fan clutch or
the fan motor. | ※ If the fan clutch is always connected, there will be a
noise at idle.
|
| •
|
Check the engine coolant sensor, wiring
and connectors. |
| •
|
Replace the
componants. | |
Remove the
thermostat and inspect
|
| •
|
Check if there are dusts or chips in the
thermostat valve. |
| •
|
Check adherence of the
thermostat. | |
| •
|
Clean the thermostat valve and reuse the
thermostat. |
| •
|
Replace the thermostat, if it doesn't
work properly. | |
Heated
excessively
|
| •
|
Temperature gauge indicates
'HI' | |
Visually check
after removing the radiator cap.
|
| •
|
Insufficient coolant or
leakage.
※ Be careful when removing a radiator
cap of the overheated
vehicle. |
| •
|
Check air in cooling
system. | |
| •
|
After refilling coolant,
recheck. |
| •
|
Check the cylinder head gaskets for
damage and the tightening torque of the mounting
bolts. | |
GDS
check&Starting engine
|
| •
|
Check the fan motor performance as
temperature varies. |
| •
|
Check if the fan clutch
slips. |
| •
|
Check the water pump adherence or
impeller damaged. | |
| •
|
Check the engine coolant sensor, wiring
and connectors. |
| •
|
Check the fan motor, the relay and the
connector. |
| •
|
Replace the fan clutch, if it doesn't
work properly. |
| •
|
Replace the water pump, if it doesn't
work properly. | |
Immerse the
thermostat in boiling water and inspection.
|
| •
|
After removing the thermostat, check it
works properly. | ※ Check the thermostat opens at the valve opening
temperature.
|
| •
|
Replace the thermostat, if it doesn't
work
properly. | |
