No. 17 Cooling System Concerns-Overheating: Notes
NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING DESCRIPTION AND POSSIBLE CAUSES (SKYACTIV-G 2.0, SKYACTIV-G 2.5)
| 17 |
COOLING SYSTEM CONCERNS-OVERHEATING |
| DESCRIPTION |
- Engine runs at higher than normal temperature/overheats.
|
| 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
- Fan rotation speed decreases (such as generator malfunction) due to battery voltage decrease
- Cooling system cap malfunction
- Cooling fan motor assembly malfunction
- Cooling fan motor connector malfunction
- Improper indication of low engine coolant temperature indicator light and/or high engine coolant temperature warning light
- ECT sensor No. 1 malfunction
- Instrument cluster malfunction
- Blown fuse
- Engine coolant system malfunction
- Improper engine coolant level
- Engine coolant performance deterioration
- Coolant leakage (engine internal, external)
- Improper water/anti-freeze mixture
- Thermostat malfunction (not fully open)
- Radiator malfunction (clogging)
- Leakage around heater unit in passenger compartment
- Drive belt damage
|
CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.
RELATED PIDS
| Item (definition) |
Unit/Condition |
Definition |
Condition/Specification (Reference) |
| ECT |
°C, °F |
Engine coolant temperature |
|
| V |
ECT sensor No. 1 voltage |
- ECT is 20 °C {68 °F}: Approx. 3.10 V
- ECT is 40 °C {104 °F}: Approx. 2.16 V
- ECT is 60 °C {140 °F}: Approx. 1.40 V
- ECT is 80 °C {176 °F}: Approx. 0.87 V
- ECT is 100 °C {212 °F}: Approx. 0.54 V
|