XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)
Engine Compartment Fan: Description and Operation
Cooling Fan For Control Modules, Turbocharger (TC) (Certain Markets Only)
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.
The engine control module (ECM) activates the fan depending on the signal from the engine coolant temperature (ECT) sensor and the temperature
sensor in the control module.
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.