Engine Cooling Fan Control

The engine cooling fan control is partitioned between the Powertrain Control Module (PCM) and the Body Control Module (BCM) via Class 2 serial data bus. The main control resides in the BCM.The BCM sends a fan speed command to the PCM which processes this command along with its own fan request in order to determine the actual fan speed. If a loss of Class 2 serial data occurs, the PCM assumes control of the engine cooling fan.

For more information on the engine cooling fan controls, refer to Engine Controls.