S60 L5-2.4L VIN 64 B5244S6 (2003)
Engine Compartment Fan: Description and Operation
Cooling Fan For Control Modules
The engine control module (ECM) is in a control module box in the engine compartment. The transmission control module (TCM) is also in this box in
vehicles with automatic transmissions.
The function of the cooling fan is to cool the control modules in the control module box in the engine compartment. The control modules may be
damaged if they overheat.
A temperature sensor is integrated in the engine control module (ECM). The engine control module (ECM) activates the fan if the control module
registers that the temperature is too high. The fan then runs continuously until the temperature has dropped to a normal level.
The cooling fan is in the hose between the control module box and the firewall.
The engine control module (ECM) can diagnose the engine cooling fan (FC). The fan can be activated using VADIS/VIDA.
A diagnostic trouble code (DTC) is stored if the temperature in the engine control module (ECM) gets too high.
