COOLING FAN MOTOR COMPONENT CONSTRUCTION/OPERATION[LF, L3]
id0112b5142300
Construction
• The cooling fan motor component is installed on the back of the cooling fan.
• The cooling fan motor component consists of the fan motor and fan control module.
Operation
• The fan control module drives the fan motor based on the cooling fan control signal sent by the PCM according to the engine coolant temperature, vehicle speed, battery voltage, A/C pressure switch is on or off, and whether the A/C magnetic clutch is on or off.
• The fan control module allows continuously variable control of the fan motor rotation rate reducing fan operation noise and power consumption. If there is a reversed power connection, the fan control module incorporates protection against reversed polarity. The motor reacts to the reversed power connections with unregulated, high-speed rotation in the wrong direction.
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Cooling fan component external view
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Cooling fan
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3
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Radiator cowling
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4
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Cooling fan motor connector
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Cooling fan motor component
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Fan control module
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Cooling fan motor
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Cooling fan electrical system wiring diagram
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Battery
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Fan control module (Including cooling fan motor)
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Fail-safe function
1. Over-current fail-safe
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― If current to the fan motor exceeds the specified value, the fan control module stops the 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 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 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.
