Cooling System Concerns-Overheating: Notes
COOLING SYSTEM CONCERNS-OVERHEATING (VIN Y) DESCRIPTION AND POSSIBLE CAUSE
| Troubleshooting item |
Cooling system concerns-overheating |
| Description |
- The engine coolant temperature is abnormally high.
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| Possible cause |
- Engine heat generation amount is excessive
- Engine speed is high and remains high for continuous long periods
- PCM DTC is stored
- Improper operation of A/C system
- Insufficient air blow volume
- Cooling fan inoperative
- Active air shutter is fully-closed and does not operate (With active air shutter)
- Fan rotation speed decreases (such as generator malfunction) due to battery voltage decrease
- ECT sensor No. 1 malfunction (value lower than actual engine coolant temperature detected)
- Cooling system cap malfunction
- Cooling fan motor assembly malfunction
- Cooling fan motor connector malfunction
- Active air shutter malfunction (With active air shutter)
- Improper indication of high engine coolant temperature warning indication
- ECT sensor No. 1 signal malfunction
- Center display malfunction
- Body control module (BCM) malfunction
- Multi-information display malfunction
- Blown fuse
- Engine coolant system malfunction
- Improper engine coolant level
- Water pump malfunction
- Engine coolant performance deterioration
- Coolant leakage (engine internal, external)
- Improper water/anti-freeze mixture
- Thermostat malfunction (not fully open)
- Radiator malfunction (clogging)
- Inappropriate engine coolant concentration (engine coolant in radiator freezes and engine coolant does not flow)
- Foreign matter penetration in engine coolant
- Leakage around heater unit in passenger compartment
- Drive belt damage
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| System wiring diagram |
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| Connector diagram |
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