To avoid possible damage, DO NOT operate the vehicle with the engine cooling fan not running. Do not attempt to repair damaged fan blades - replace the fan. In addition, an auxiliary electric fan installed in front of the radiator or air conditioning condenser can be turned on without starting the engine or turning on the ignition. Its operation is controlled by the temperature of the cooler using temperature sensors-switches located on the radiator.
Examination
Auxiliary electric fan
This fan on most models is controlled by two temperature switches located in the radiator: one for operation at low temperatures with a low rotation speed, the other for operation at high temperatures with a high rotation speed. Each of the switches operates at a certain coolant temperature (see Table of sizes and adjustment data at the end of the guide).
The thermostatically controlled auxiliary fan high and low speed switches are located in the radiator reservoirs, in different locations depending on engine type and vehicle model (see illustration). Either one double or two single switches can be installed.
1. Insert a small screwdriver into the connector to pry out the locking tab and disconnect the fan wiring.
2. To check the fan motor, disconnect the electrical connector of the motor using the wire from the vehicle jump start kit, connect the fan directly to the battery. If the fan does not work, then the motor is defective and must be replaced. If the fan is running, the switch may be defective. For a more accurate diagnosis, perform a test that matches your vehicle model.
Turn the auxiliary fan motor by hand to check if it is stuck. Before doing this, however, make sure that the engine has cooled down sufficiently and there is no danger of the fan turning on spontaneously during the test.
3. To test the low and high speed circuits, disconnect the electrical connector from one of the switches and connect the connector terminals with a short piece of wire. The fan should run at low or high speed, depending on which switch has been disconnected. On some models, the ignition must be turned on before starting the fan.
4. Repeat the test on another switch.
5. If the low and high speed circuits are OK, but the fan is still not working properly, replace the switch (or switches). To remove the switch, drain the coolant to a level below the level of the switch (see chapter Car maintenance), then loosen the screws, remove the old switch and install the new one. Add coolant to the system.
6. If the switches are OK, but the motor still does not work, then the problem is most likely a faulty fuse, relay, or wiring connecting the components (or the fan motor itself). Carefully check the fuse, relay, all wiring and connectors. See Chapter Onboard electrical system.
Viscosity clutch mechanical fan
1. Disconnect the negative battery cable and rock the fan from side to side by hand to check the bearing play.
If your car's radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery.
If, after connecting the battery, the inscriptions on the instrument panel appear in the wrong language, refer to Section Anti-theft audio system and instrument panel language, for instructions on how to set the desired language.
2. Let the motor cool down and turn the fan blades by hand. They should turn with little resistance.
3. Inspect the fan clutch assembly for signs of severe fluid leakage. If there is such a leak, replace the clutch assembly.
4. Warm up the engine to operating temperature, turn off the ignition and disconnect the negative battery cable. Turn the fan by hand. This time, the resistance should be stronger. If the blades turn easily, the fan clutch should be replaced.
Removal and installation
Auxiliary electric fan
1. Disconnect the negative battery cable.
2. To remove the auxiliary fan, follow the procedure for your vehicle model.
3. Give screws and remove the panel of a covering before a radiator.
4. Unbolt the fan assembly from the condenser mounting points.
5. Disconnect the fan electrical connector.
6. Remove the fan and shroud from the vehicle, taking care not to damage the air conditioning condenser, where present, when removing the fan.
7. Install in reverse order.
Viscosity clutch mechanical fan
1. Disconnect the negative battery cable. Loosen the screws or remove the plastic fasteners of the fan shroud and detach the shroud (see Section Removal and installation of a radiator).
2. The cooling fan on the water pump is attached to the shaft with a left hand threaded nut located directly behind the fan.
3. Using a 32mm wrench, remove the fan/clutch assembly. Place the wrench on the large nut in front of the pulley and tap the end of the wrench -A with a metal drift -B to loosen the nut.
This nut has a left-hand thread, so you can release it by turning it clockwise when looking at the car from the front.
4. Remove fan/clutch assembly (and cover if needed) from the engine compartment.
5. If it is necessary, give four bolts of fastening of a pulley to a nave of the water pump. The pulley can then be removed by removing the drive belts.
6. Carefully inspect the fan blades for defects or damage. Replace them if necessary.
7. The fan can now be unbolted from the clutch if necessary. If you are going to put the fan clutch on a shelf, place it with the side towards the heatsink facing down.
8. Install in reverse order