ELECTRICAL FAN CONTROL OPERATION [MZR-CD (RF Turbo)]

id0140f1104000

•  The PCM compares the duty ratios determined at the engine coolant temperature and refrigerant pressure controls and sends the higher duty ratio as the control signal to the fan control module.

Engine coolant temperature control

PCM output duty ratio

Engine operation conditions
100 %
•  Engine coolant temperature is 108°C {226°F} or more.
75 %
•  Engine coolant temperature is 106—108°C {223—226 °F}.
0 %
•  Engine coolant temperature is less than 100 °C {212 °F}.

Refrigerant pressure control

PCM output duty ratio

Engine operation conditions
75 %
•  When all of the following conditions are met:
―  A/C is on.
―  Refrigerant pressure switch (medium pressure) is on.
65 %
•  When all of the following conditions are met:
―  A/C is on.
―  Refrigerant pressure switch (medium pressure) is off.
―  Vehicle speed is 45 km/h {27 mph} or less.
60 %
•  When all of the following conditions are met:
―  A/C is on.
―  Refrigerant pressure switch (medium pressure) is off.
―  Vehicle speed is 45—85 km/h {28—52 mph}.
0 %
•  When all of the following conditions are met:
―  A/C is on.
―  Refrigerant pressure switch (medium pressure) is off.
―  Vehicle speed is 85 km/h {53 mph} or more.
•  A/C is off.