BASIC INSPECTION

Before performing the inspection of radiator cooling fan, make sure that the follwing items :

① Coolant level

② Engine coolant leakage through the radiator test

③ Water pump seal leakage with the belt

CHECK PROCEDURE

1. Radiator fan relay No.1 test (Normally-open type A)

① Remove the radiator fan relay and there should be the continuity between the terminal 1 and the terminal 2 when power and ground are connected to the terminal 5 and the terminal 3.

② There should be no continuity between the terminal 1 and the terminal 2 when power is disconnected.

2. Radiator fan motor test

① Disconnect the 3 terminal connector from the radiator fan motor.

② Test the motor by connecting battery power to the terminal 1 and ground to the terminal 3.

③ If the motor fails to run or does not run smoothly, replace the motor.

3. Thermostat test

① Replace the thermostat if it is open at the room temperature.

② Suspended the thermostat in a container of water and heat the water the temperature with the thermometer. Check the temperature at which the thermostat first opens, and at which it is fully open.