Blower Fan
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
The blower fan is brushless, of the permanent magnet type. It supplies airflow through the vehicle, and must be running for the climate control to connect.
The blower fan is controlled via a PWM signal from the Central electronic module (CEM). The Climate control module (CCM) controls the speed of the blower fan with a request to the Central electronic module (CEM) via the CAN network.
The blower fan can be diagnosed via the Central electronic module (CEM), among others, via a PWM control signal that it sends back to the Central electronic module (CEM).