No. 17 Cooling System Concerns-Overheating: Notes

17	COOLING SYSTEM CONCERNS-OVERHEATING
DESCRIPTION	Engine runs at higher than normal temperature/overheats.
POSSIBLE CAUSE	Radiator hoses damage Coolant leakage Leakage around heater unit Leakage at coolant hoses and/or radiator Improper coolant level Fans reverse rotation Fuse malfunction Coolant overflow system malfunction Poor radiator condition Improper or damaged radiator cap Improper water/anti-freeze mixture PCM DTC is stored. Improper operation of A/C system Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal.) Refrigerant pressure sensor malfunction Improper operation of cooling fan control system Improper tension of drive belt Thermostat malfunction Improper indication of low engine coolant temperature indicator light and/or high engine coolant temperature warning light ECT sensor malfunction Instrument cluster malfunction

COOLING SYSTEM CONCERNS-OVERHEATING

DESCRIPTION

POSSIBLE CAUSE

Radiator hoses damage
Coolant leakage
- Leakage around heater unit
- Leakage at coolant hoses and/or radiator
Improper coolant level
Fans reverse rotation
Fuse malfunction
Coolant overflow system malfunction
Poor radiator condition
Improper or damaged radiator cap
Improper water/anti-freeze mixture
PCM DTC is stored.
Improper operation of A/C system
- Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal.)
- Refrigerant pressure sensor malfunction
Improper operation of cooling fan control system
Improper tension of drive belt
Thermostat malfunction
Improper indication of low engine coolant temperature indicator light and/or high engine coolant temperature warning light
- ECT sensor malfunction
- Instrument cluster malfunction