Radiator Cooling Fan: Description and Operation

Cooling Fan Operation Description

Radiator cooling fan motors are controlled by ECM on the following conditions.

A/C switch: OFF

NOTE:

The following table indicates cooling fan operation while engine is running at 1,250 rpm.

It depends on engine revolution to determine temperature for changing proper fan motor speed.










A/C switch: ON

NOTE:

It depends on engine revolution to determine temperature for changing proper fan motor speed.

Low speed

Cooling fan operates at low speed when A/C refrigerant pressure is more than specified value 1.5 MPa (15.3 kgf/cm2, 218 psi).

High speed

Cooling fan speed changes at high speed from low when A/C refrigerant pressure is more than specified value 1.8 MPa (18.4 kgf/cm2, 261 psi).

Fail-safe

Cooling fan operates high speed on condition that malfunction is detected in ECT sensor.