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 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 connector from the radiator fan motor.

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

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

3. Coolant temperature guage test

① Disconnect the water temperature sensor after turning the ignition switch OFF

② The water temperature sensor terminal 2 grounds it with a jump wire

③ Turn the ignition switch ON and check the pointer of the coolant temperature guage starts moving toward the "H" mark.

- Check for open or short in the wire between the WTS terminal 2 and the coolant temperature gauge

- Check the fuse (10A) at the dash fuse box.

4. 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.