Electric Cooling Fan Control Module (240PS Engine Only)
The electric cooling fan control module is located on the rear of the cooling fan shroud. The control module is located in the shroud moulding and secured with a screw.
The electric cooling fan control module is controlled by the Powertrain Control Module (PCM) using a Pulse Width Modulation (PWM) ground. A permanent battery voltage is supplied from a fused output from the Battery Junction Box (BJB) and the Engine Junction Box (EJB). The output is controlled by the PCM relay in the EJB. The relay is controlled by the PCM.
The PCM controls the speed of the electric cooling fan operation using the PWM ground. The electric cooling fan is used for engine cooling and air conditioning purposes.
The PCM uses a Pulse Width Modulation (PWM) signal to control the electric cooling fan motor speed between 0 and 100%. The electric cooling fan has four modes of operation:
- Off
- Minimum speed (750 Revolutions Per Minute (RPM))
- Linear variable speed between minimum and maximum speeds
- Maximum speed (2820 RPM).
Under hot operating conditions, the fan may continue to operate for up to two minutes after the engine has been switched off.
The electric cooling fan control module monitors for over and under input voltage, a stalled motor and a partially stalled motor. If it detects any of these faults the electric cooling fan control module temporarily pulls the PWM signal to ground to notify the fault to the PCM. The length of time the PWM signal is pulled to ground varies between 2 and 8 seconds, depending on the fault. The cooling fan control module repeats the notification process at 5 second intervals until the fault is cleared.
If there is more than one fault, only the highest priority fault is notified to the PCM. Fault priorities, in descending order, are over voltage, under voltage, stalled motor and partially stalled motor. The PCM records a related DTC (diagnostic trouble code) for faults notified by the fan control module and signals to the Instrument Cluster (IC). The signal is sent on the FlexRay to the Body Control Module/Gateway Module (BCM/GWM). The signal then goes via the High Speed (HS) Controller Area Network (CAN) Human Machine Interface (HMI) systems bus to the IC to display a warning message.