Mazda CX-9 2007 - Airflow Temperature Automatic Control; Correction; Airflow Temperature; Airflow Volume Control Outline

CONTROL SYSTEM
07-40–22
AIRFLOW TEMPERATURE CONTROL OPERATION
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Airflow Temperature Automatic Control
• The front climate control unit calculates the air mix actuator (front/rear) opening angle (airflow temperature) by
adding the correction input from the ECT sensor and evaporator temperature sensor (front/rear) to the target
temperature that was calculated based on the set temperature and input from each sensor, operating the
actuator.
Correction
MAX HOT and MAX COLD correction
• When the temperature is set to 32.0, the air mix actuator (front/rear) opening angle is fixed at fully open and
when set to 15.0, it is fixed at fully closed.
Air mix actuator opening angle correction
• The climate control unit maintains the actuator at the opening angle calculated based on the position signal
from the potentiometer inside the air mix actuator (front/rear).
End Of Sie
NG: AIRFLOW VOLUME CONT ROL
AIRFLOW VOLUME CONTROL OUTLINE
id074000102400
Features
• Consists of the airflow volume automatic and manual controls with the front climate control unit controlling the
airflow volume (blower motor applied voltage) via the front power MOS FET or rear power MOS FET.
End Of Sie
20 {68} 86 {187}
HI
LO
ENGINE COOLANT TEMPERATURE
(°C {°F})
ENGINE COOLANT
TEMPERATURE
CORRECTION VALUE
TARGET
TEMPERATURE
EVAPORATOR
TEMPERATURE
SENSOR
(FRONT/REAR)
FRONT
CLIMATE CONTROL UNIT
AIR MIX ACTUATOR
OPENING ANGLE
CALCULATION
AIR MIX
ACTUATOR
(FRONT, REAR)
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-4 -3
4
3
OFF
ON
(%)
AIR MIX ACTUATOR OPENING ANGLE CORRECTION
TARGET OPENING ANGLE - ACTUAL OPENING ANGLE
POSITION
SIGNAL
AIR MIX ACTUATOR
(FRONT/REAR)
FRONT
CLIMATE
CONTROL
UNIT
M
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