Troubleshooting Chart
| Symptom | Check items | |||
|---|---|---|---|---|
| Cooling system parts malfunction | Poor heat transfer | Water pump malfunction | Worn or loose drive belt | |
| Thermostat stuck closed | Coolant circulation | |||
| 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 | Radiator shroud | |||
| Improper coolant mixture ratio | Coolant viscosity | |||
| Poor coolant quality | ||||
| Insufficient coolant | Coolant leaks | Cooling hose | Loose clamp Cracked hose Poor sealing | |
| Heater pump | ||||
| Water pump | ||||
| 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 | ||||
| Powertrain system malfunction | ||||
| Installed improper size wheels and tires | ||||
| Dragging brakes | ||||
| Improper ignition timing | ||||
| Blocked or restricted air flow | Blocked radiator grille | Installed car brassiere | ||
| Blocked bumper | Mud contamination or paper clogging | |||
| Blocked radiator | ||||
| Blocked condenser | ||||
OVERHEATING CAUSE ANALYSIS TROUBLESHOOTING CHART
Scheme 1
Scheme 2
INSPECTION AFTER INSTALLATION
- Check for engine coolant leaks. Refer to , " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-239944-S05600405852006080400000) ".
- Start and warm up the engine. Visually make sure that there are no engine coolant leaks or A/T fluid leaks.
- Check for engine coolant leaks. Refer to , " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-239944-S05600405852006080400000) ".
- Start and warm up engine. Visually inspect that there are no engine coolant or A/T fluid leaks.
Scheme 3
- Check for engine coolant leaks. Refer to , " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-239944-S05600405852006080400000) ".
- Start and warm up the engine. Visually make sure that there are no engine coolant leaks or A/T fluid leaks.
Scheme 4
Scheme 5
- Drain coolant. Refer to , " «CHANGING ENGINE COOLANT»(ref-239944-S24399931942006080400000) ". CAUTION: Perform when engine is cool.
- Remove IPDM E/R bolts and position aside. Refer to , " «REMOVAL AND INSTALLATION OF IPDM E/R»(ref-239939-S09181280512006080300000) ".
- Disconnect lower radiator hose.
- Disconnect oil cooler line.
- Remove engine coolant inlet and thermostat assembly. Do not disassemble engine coolant inlet and thermostat assembly. Replace them as a unit, if necessary.
Scheme 6
- Check valve seating condition at ordinary room temperatures. It should seat tightly.
- Check valve opening temperature and maximum valve lift. THERMOSTAT VALVE TEMPERATURE Thermostat Standard Values Valve opening temperature 80 - 84°C (176 - 183°F) Valve lift 8.6 mm/95°C (0.339 in/203°F) Valve closing temperature 77°C (171°F) or lower
- Check for engine coolant leaks. Refer to , " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-239944-S05600405852006080400000) ".
- Start and warm up the engine. Visually make sure that there are no engine coolant leaks or A/T fluid leaks.
Scheme 7
- Check for engine coolant leaks. Refer to , " «CHECKING COOLING SYSTEM FOR LEAKS»(ref-239944-S05600405852006080400000) ".
- Start and warm up the engine. Visually make sure that there are no engine coolant leaks or A/T fluid leaks.