FAN CONTROL MODULE CONSTRUCTION/OPERATION [MZR-CD 2.2]
id0112f3100600
Construction
• Fan control module is installed on the radiator cowling.
Operation
• The fan control module allows continuously variable control of the cooling fan motor rotation rate, reducing fan operation noise and power consumption.
Fail-safe function
The fan control module has a power supply function to operate the cooling fan motor and the following protection functions.
1. Over-current fail-safe
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― If current to the cooling fan motor exceeds the specified value, the fan control module stops the cooling fan motor for a specified period of time.
2. Over heat fail-safe
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― If the internal area of the fan control module exceeds the specified temperature, the fan control module stops the cooling fan motor for a specified period of time.
3. Input signal open circuit fail-safe
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― If there is an open circuit in the wiring harness between the PCM and the fan control module, the fan control module stops the cooling fan motor.
4. Reversed polarity fail-safe
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― If there is a reversed power connection, the fan control module incorporates protection against reversed polarity. The motor reacts to reversed connections with unregulated, high-speed rotation in the opposite direction.
