Grand Vitara 2WD V6-3.2L (2010)
Control Module HVAC: Description and Operation
HVAC Control Module Operation Description
Temperature Control
HVAC control module calculates the target temperature control door position based on signals from the temperature selector, inside air temperature
sensor, outside air temperature sensor and sunload sensor and controls the temperature control actuator so that the current position of the temperature
control door matches its target position.
Blower Fan Speed Control
HVAC control module calculates the target blower fan speed based on signals from the temperature selector, inside air temperature sensor, outside air
temperature sensor and sunload sensor, compares it with the current blower fan speed inputted from the blower motor controller to control the current
blower fan speed to the target level.
Air Flow Outlet Control
HVAC control module calculates the target air flow outlet control door position based on signals from the target temperature control door position and
controls the air flow control actuator so that the current air flow control door position becomes the target position.
Air Intake Position Control
HVAC control module determines the air intake position based on signals from the temperature selector, inside air temperature sensor and outside air
temperature sensor and controls the air intake actuator.
Furthermore, when the defrost switch is turned on or the "MODE" (air flow) selector is selected to "D/F" mode, HVAC control module fixes the position
of the air intake control door to the FRESH position (FRE) to clear fogging from windshield.
