Electric Cooling Fan
CAUTION:
Refer to Electric Coolant Fan Caution
in Cautions and Notices.
CAUTION:
If a fan blade is bent or damaged in any way, no attempt should be made to repair or reuse the damaged part. A bent or damaged fan assembly should always be replaced with a new one.
The cooling fans are mounted behind the radiator in the engine compartment. The electric cooling fans increase the flow of air across the radiator fins and across the condenser on A/C-equipped vehicles. This helps to speed cooling when the vehicle is at idle or moving at low speeds.
The fan size is 366 mm (14.4 in) in diameter with 5 blades to aid the airflow through the radiator and the condenser. A non-A/C model is 300 mm (11.8 in). An electric motor attached to the radiator support drives the fan.
A/C OFF or Non-A/C Model
- The cooling fans are actuated by the engine control module (ECM) using a low-speed cooling fan relay and a high-speed cooling fan relay. On A/C-equipped vehicles, a series/parallel cooling fan relay is also used.
- The ECM will turn the cooling fans ON at low speed when the coolant temperature reaches 93°C (199°F) and high speed at 97°C (207°F).
- The ECM will change the cooling fans from high speed to low speed at 94°C (201°F) and turn the cooling fans OFF at 90°C (194°F).
A/C ON
- The ECM will turn the cooling fans ON at low speed when the A/C system is ON. The ECM will change to high speed when the coolant temperature reaches 97°C (207°F) or high-side A/C pressure reaches 1 882 kPa (273 psi).
- The cooling fans will return to low speed when the coolant temperature reaches 94°C (201°F) or high-side A/C pressure reaches 1 448 kPa (210 psi).