Mazda 2007 CX-9, Service Highlights, Page: 109 / 614

CONTROL SYSTEM [MZI-3.5]
01-40–5
01-40
ELECTRICAL FAN CONTROL OPERATION [MZI-3.5]
id0140c1104000
Without Towing Package
•
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
Refrigerant pressure control
With Towing Package
•
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
Refrigerant pressure control
End Of Sie
NG: PCM
PCM output duty ratio Engine operation conditions
100 %
•
Engine coolant temperature is less than 96
°
C {205
°
F}.
70—30 %
•
Engine coolant temperature is 96—106
°
C {205—223
°
F}.
0 %
•
Engine coolant temperature is more than 106
°
C {223
°
F}.
PCM output duty ratio Engine operation conditions
44 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is on.
53 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is off.
—
Vehicle speed is 70 km/h {43 mph} or less.
100 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is off.
—
Vehicle speed is 70 km/h {43 mph} or more.
PCM output duty ratio Engine operation conditions
100 %
•
Engine coolant temperature is less than 96
°
C {205
°
F}.
70—25 %
•
Engine coolant temperature is 96—106
°
C {205—223
°
F}.
0 %
•
Engine coolant temperature is more than 106
°
C {223
°
F}.
PCM output duty ratio Engine operation conditions
45 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is on.
52 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is off.
—
Vehicle speed is 70 km/h {43 mph} or less.
100 %
•
When all of the following conditions are met:
—
A/C is on.
—
Refrigerant pressure switch (medium pressure) is off.
—
Vehicle speed is 70 km/h {43 mph} or more.
3423-1U-06H(01-40).fm 5 ページ ２００６年１１月２２日 水曜日 午後２時１８分