Troubleshooting Chart
| Symptom | Check items | |||
|---|---|---|---|---|
| Cooling system parts malfunction | Poor heat transfer | Water pump malfunction | Worn or loose drive belt | |
| Thermostat stuck closed | Thermostat | |||
| Damaged fins | Dust contamination or paper clogging | |||
| Physical damage | ||||
| Clogged radiator cooling tube | Excess foreign material (rust, dirt, sand, etc.) | |||
| Reduced air flow | Cooling fan does not operate | Fan assembly | ||
| High resistance to fan rotation | ||||
| Damaged fan blades | ||||
| Damaged radiator shroud | ||||
| Improper engine coolant mixture ratio | Engine coolant viscosity | |||
| Poor engine coolant quality | ||||
| Insufficient engine coolant | Engine coolant leaks | Cooling hose | Loose clamp | |
| Cracked hose | ||||
| Water pump | Poor sealing | |||
| Radiator cap | Loose | |||
| Poor sealing | ||||
| Radiator | O-ring for damage, deterioration or improper fitting | |||
| Cracked radiator tank | ||||
| Cracked radiator core | ||||
| Reservoir tank | Cracked reservoir tank | |||
| Overflowing reservoir tank | Exhaust gas leaks into cooling system | Cylinder head deterioration | ||
| Cylinder head gasket deterioration | ||||
| Except cooling system parts malfunction | Overload on engine | Abusive driving | High engine RPM under no load | |
| Driving in low gear for extended time | ||||
| Driving at extremely high speed | ||||
| Power train system malfunction | ||||
| Installed improper size wheels and tires | ||||
| Dragging brakes | ||||
| Improper ignition timing | ||||
| Blocked or restricted air flow | Blocked bumper | Installed front bumper fascia cover | ||
| Blocked radiator grille | ||||
| Mud contamination or paper clogging | ||||
| Blocked radiator | Blocked air flow | |||
| Blocked condenser | ||||
| Installed large fog lamp | ||||
TROUBLESHOOTING CHART
Scheme 5
INSPECTION AFTER INSTALLATION
- Check for leaks of engine coolant. Refer to " «LEVEL CHECK»(ref-337624-S15551089212009080600000) ".
- Start and warm up engine. Visually check if there is no leaks of engine coolant and CVT or A/T fluid if equipped. Refer to " «CVT FLUID»(ref-337628-S15518868582009080600000) " or " «A/T FLUID»(ref-337615-S30547971652009080600000) ".
Scheme 6
Scheme 7
Scheme 8
- Check valve seat of radiator cap. Check if valve seat is swollen to the extent that the edge of the plunger cannot be seen when watching it vertically from the top. Check if valve seat has no soil and damage.
- Pull negative-pressure valve to open it, and make sure that it is completely closed when released. Make sure that there is no dirt or damage on the valve seat of radiator cap negative-pressure valve. Make sure that the valve operates properly in the opening and closing conditions.
- Check radiator cap relief pressure using Tool. Tool number: EG17650301 (J-33984-A) Standard: 78 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/cm 2 , 11 - 14 psi) Limit: 59 kPa (0.59 bar, 0.6 kg/cm 2 , 9 psi) When connecting the radiator cap to the tester, apply water or coolant to the cap seal surface. Replace the radiator cap if there is an abnormality in the negative-pressure valve, or if the open-valve pressure is outside of the standard values.
- Replace radiator cap if there it does not comply to specifications to the above three checks. CAUTION: When installing radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
INSPECTION AFTER DISASSEMBLY
Inspect cooling fan for crack or unusual bend.
- If anything is found, replace cooling fan.
INSPECTION AFTER REMOVAL
- Visually check that there is no significant dirt or rusting on water pump body and vane (A).
- Make sure that there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
- Replace water pump, if necessary.
- Check for leaks of engine coolant. Refer to " «INSPECTION»(ref-337624-S32436696672009080600000) ".
- Start and warm up the engine. Visually check if there is no leaks of engine coolant.
Scheme 9
- Place a thread (A) so that it is caught in the valves of thermostat (1). Immerse fully in a container (B) filled with water. Heat while stirring.
- The valve opening temperature is the temperature at which the valve opens and falls from the thread.
- Continue heating. Check the full open valve lift amount.
- After checking the maximum valve lift amount, lower the water temperature and check the valve closing temperature. VALVE OPENING TEMPERATURE SPECIFICATION Items Thermostat Valve opening temperature 80.5 - 83.5°C (177 - 182°F) Maximum valve lift 8 mm/95°C (0.315 in/203°F) Valve closing temperature 77°C (171°F)
- If out of the specification, replace thermostat.
- Check for leaks of engine coolant. Refer to " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-337624-S01447429422009080600000) ".
- Start and warm up the engine. Visually check for engine coolant leaks.
Scheme 10
- Check for leaks of engine coolant. Refer to " «INSPECTION»(ref-337624-S32436696672009080600000) ".
- Start and warm up the engine. Visually check if there is no leaks of engine coolant.