Checking the Engine Cooling Fan (FC) and Cooling System

Checking the engine cooling fan (FC) and cooling system

Checking the engine cooling fan (FC) and cooling system
Check the coolant level.
Missing coolant may be due to:
- leakage in the cooling system
- the coolant has boiled.
Leakage in the cooling system can be caused by:
- leakage in the radiator, heater unit, hoses etc.
- defective cylinder head gasket.
If the coolant has boiled it may be due to:
- a defective expansion tank cap
- a defective thermostat
- a defective engine cooling fan (FC)
- a blocked radiator.

Checking the expansion tank cap
Disconnect the hose between the expansion tank and the radiator.
Pressure test the expansion tank. The pressure is given on the cap (normally 150 kPa).

Checking the thermostat
Start the engine. Allow the engine to idle. Read off the engine coolant temperature (ECT).
Check that the thermostat opens at approximately 90° C. Hold the hose from the thermostat housing to the radiator, the hose at the radiator becomes hot when the thermostat is opened.

Checking the engine cooling fan (FC)
- Ignition on
- Activate the engine cooling fan (FC) by pressing "Start activate". The fan starts at the highest speed and stops after approximately 10 seconds.
Check that the engine cooling fan (FC) functions.
Remedy as necessary.

Other information:
- To check for leaks in the cooling system, see under the Information tab.
- The engine cooling fan (FC) operates in 2 stages, stage 1 and stage 2
- The cooling system boils at approximately 130°C.





Continue - FAULT FOUND

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