Description & Operation

The electric cooling fan system consists of a 2-speed cooling fan controlled by Powertrain Control Module (PCM). Two relays control fan speed. The electric cooling fan is activated when ignition switch is in ON position and engine coolant exceeds a specified temperature. Cooling fan is also active when A/C is on.

The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc.) to determine engine cooling fan needs. The PCM controls the fan operation through the engine cooling fan control and the high speed fan control outputs.