Fan and heatsink elements (models before 2000)
1 - radiator;
2 - expansion tank;
3 - casing;
4 - electric motor;
5 - fan impeller;
6 - lower radiator hose;
7, 8 - thermal switch;
9 - drain plug.
The electric cooling fan is mounted on the radiator shroud. Remove the cover to remove it (3) from the radiator, disconnect the fan plug and remove the fan impeller (5). Then the fan motor can be disconnected from the casing by unscrewing the mounting bolts for this.
The fan cannot be repaired and, if necessary, must be replaced. First, make sure that the fault is not in the thermal switch, not in the wire, by applying a voltage of 12 V directly to the motor contacts (1).
The fan motor either works or it doesn't. If the motor rotates, then it is normal.
Attention: Do not turn on the motor for more than a few seconds with the fan removed.
Fan Motor Test/ Radiator Fan Relay Test
The radiator fan relay is installed in the turnip box in the engine compartment.
Remove the relay from the relay box
Connect relay pins 1 and 2 to the battery and at the same time connect an ohmmeter to pins 3 and 4. The resistance should be 0 ohm.
Turn off the voltage, the resistance between pins 3 and 4 should be infinity.
Check the resistance between tracks 1 and 2 with battery voltage disconnected. Required value: 0 ohm.
Checking the thermal switch
The thermal switch is installed next to the radiator drain fitting, at the bottom. When the coolant temperature rises, it turns on the electric fan. The switch is faulty if the electric fan does not turn on when the radiator is hot.
Checking the thermal switch is as follows:
Disconnect the thermal switch connector.
Bridge both pins of the connector with a wire. If the fan turns on, replace the thermal switch.
If the fan does not turn on, check the contacts and the correct connection of the fan motor connector, check the wiring of the relay and the fan motor according to the wiring diagram.
Fasten the new thermal switch with a tightening torque of 30 Nm, applying sealant to the threads.
Fill with coolant.
Warm up the engine and let it idle until the fan turns on. Check coolant level.
You can also check the thermal switch in the removed state. An ohmmeter should be connected to its contacts.
Place the thermal switch in hot water up to the thread and measure the resistance.
At 88°± 3°C the resistance should be 0, below 78°C it should be infinity.