Cooling Fan For Control Modules, Turbocharger (TC) (Certain Markets Only)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
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 cooling fan. The fan can be activated using VIDA.
A diagnostic trouble code (DTC) is stored if the temperature in the engine control module (ECM) gets too high.