FAN CONTROL MODULE CONSTRUCTION/OPERATION [MZR-CD 2.2]SM1934383
FAN CONTROL MODULE CONSTRUCTION/OPERATION [MZR-CD 2.2]
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Construction
• Fan control modules No.1 and No.2 are installed on the radiator cowling.
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Operation
• The fan control modules No.1 and No.2 drive the each cooling fan motors based on the cooling fan control signals sent by the PCM. (See
ELECTRICAL FAN CONTROL OUTLINE [MZR-CD 2.2].)
• The fan control module allows continuously variable control of the cooling fan motor rotation rate, reducing fan operation noise and power consumption.
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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
― 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
― If the internal temperature of the fan control module exceeds a specified temperature, the cooling fan motor starts running at high speed. If the temperature continues to increase and exceeds a specified temperature, the cooling fan motor stops running. (When the ignition switch is turned off, it returns to normal operation.)
3.Input signal open circuit fail-safe
― If there is an open circuit in the wiring harness between the PCM and fan control module, the cooling fan motor runs at high speed.
