Radiator Cooling Fan: Description and Operation

SYSTEM OUTLINE

SYSTEM OPERATION
If the ignition SW is turned to ON, the current from the FR-IG fuse is sent to the coil side and the FAN relay is turned to ON.

Then the current flows to TERMINAL 3 of the cooling fan ECU. At the same time, the conditions of the A/C SW, A/C dual pressure SW and engine rotation are sent to the TERMINAL 2 as signals from the TERMINAL RFC of the engine control module. As a result of that, the cooling fan ECU continuously controls the rotation of the fan motor and keeps a balance between the cooling efficiency and silentness with the optimal fan rotation.