Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUZUKI2010KIZASHI FWD L4-2.4LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGRELAYS AND MODULES - HVACCONTROL MODULE HVACDESCRIPTION AND OPERATION
2010 Suzuki Kizashi FWD L4-2.4L
Control Module HVAC: Description and Operation
2010 Suzuki Kizashi FWD L4-2.4LSECTION Description and Operation
HVAC Control Module Operation Description
Temperature Control
HVAC control module calculates the target temperature control door position of driver side and passenger side based on signals from the temperature selector, inside air temperature sensor, outside air temperature sensor and sunload sensor (driver side and passenger side detecting type) 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. Comparing the calculation result with the current blower fan speed, HVAC control module controls the 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) switch is selected to "D/F" mode, HVAC control module fixes the position of the air intake control door to the FRESH (FRE) position to clear fog from windshield.
Temperature Control
HVAC control module calculates the target temperature control door position of driver side and passenger side based on signals from the temperature selector, inside air temperature sensor, outside air temperature sensor and sunload sensor (driver side and passenger side detecting type) 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. Comparing the calculation result with the current blower fan speed, HVAC control module controls the 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) switch is selected to "D/F" mode, HVAC control module fixes the position of the air intake control door to the FRESH (FRE) position to clear fog from windshield.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.