< Previous Next >

2016 – MX-5 – Engine

FAN CONTROL MODULE [SKYACTIV-G 2.0]

Purpose, Function

• A fan control module has been adopted which enables stepless control of the fan rotation speed to save energy and reduce vibration and noise from the fan.

• The fan control module has a power supply function to operate the cooling fan motor and the following protection functions.

1. Excess-current protection

1. If the electrical current to the cooling fan motor exceeds a certain value, the excess-current protection function of the fan control module operates, and the cooling fan motor is stopped.

2. Overheating protection

1. If the temperature inside the fan control module reaches a certain temperature or more, the overheating protection function of the fan control module operates in the following order.

• The rotation speed of the cooling fan motor is increased to increase cool air flow to the fan control module.

• If the temperature increases further, the cooling fan motor is stopped to suppress heat generated from energization.

Construction

• The fan control module is located in the radiator cowling.

  

Operation

1. Electric current flows (1) to the cooling fan relay coil based on the signals from the PCM.

2. When electric current flows to the coil, the contact point is attracted by the generated electromagnetic power and switches on (2).

3. When the contact point switches on, battery power is supplied (3) to the fan control module.

4. The fan control module drives the cooling fan motor (5) based on the cooling fan control signal (4) sent from the PCM.

5. Depending on the control signal sent from the PCM, the cooling fan may remain operational for several seconds or minutes after the ignition is switched off. (See ELECTRICAL FAN CONTROL [SKYACTIV-G 2.0].)

Fail-safe

DTC	Fail-safe
P2428:00	Operates the cooling fan (high speed rotation) Fixed charging efficiency

< Previous Next >