AIR CONDITIONING SYSTEM SYSTEM DESCRIPTION

GENERAL

1. The air conditioning system has the following controls.

   Control	Outline
   Neural Network Control	This control is capable of performing complex control by artificially simulating the information processing method of the nervous system of living organisms in order to establish a complex input/output relationship similar to that of a human brain.
   Outlet Air Temperature Control	Based on the temperature set by the temperature control dial, neural network control calculates outlet air temperature based on input signals from various sensors.
   Dual Control	The temperature settings for the driver and front passenger are controlled independently in order to provide separate vehicle interior temperatures for the right and left sides of the vehicle. Thus, the air conditioning accommodates the occupants' preferences.
   Blower Control	Controls the blower motor in accordance with the airflow volume that has been calculated by neural network control based on the input signals from various sensors.
   Air Outlet Control	Automatically switches the air outlets in accordance with the outlet mode that has been calculated by neural network control.
   	In accordance with the engine coolant temperature, ambient air temperature, amount of sunlight, required blower, outlet temperature and vehicle speed conditions, this control automatically switches the blower outlet to foot and defroster mode to prevent the windows from becoming fogged up when the ambient air temperature is low.
   Air Inlet Control	Automatically controls the air inlet control damper to help achieve the calculated outlet air temperature that is required.
   	Drives the air inlet control servo motor according to the operation of the air inlet control switch and moves the dampers to the fresh or recirculation position.
   Electric Inverter Compressor Control	Through the calculation of the target evaporator temperature based on various sensor signals, the air conditioning amplifier optimally controls discharge capacity by regulating the opening extent of the compressor solenoid valve. The air conditioning amplifier assembly calculates the target speed of the compressor based on the target evaporator temperature (which is calculated by the cooler (room temperature sensor) thermistor, thermistor assembly, automatic light control sensor) and the actual evaporator temperature that is detected by the No. 1 cooler thermistor in order to control the compressor speed.
   	The air conditioning amplifier assembly calculates the target evaporator temperature, which includes corrections based on the cooler (room temperature sensor) thermistor, thermistor assembly, the automatic light control sensor, and No. 1 cooler thermistor. Accordingly, the air conditioning amplifier assembly controls the compressor speed to an extent that would not inhibit the proper cooling performance or defogging performance.
   	Turns the air conditioning on automatically when the AUTO button is pressed when the air conditioning is off.
   	Decreases the compressor speed in order to ensure quietness when the vehicle is stopped or the engine is off.
   Defroster Control	Defroster control logic is used to improve defroster performance.
   PTC Heater Control	When the hybrid control system is operating (READY), and the blower motor with fan sub-assembly is turned on, the air conditioning amplifier assembly turns on the quick heater assembly if the conditions listed below are met. Engine coolant temperature is below specified temperature. Outside temperature is below specified temperature. Tentative air mix damper opening angle is above the specified value (MAX HOT).
   ECO Mode Control	When the integration control and panel assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly limits the air conditioning system performance.
   Diagnosis	A Diagnostic Trouble Code (DTC) is stored in memory when the air conditioning amplifier detects a problem with the air conditioning system.

MODE POSITION AND DAMPER OPERATION

1. Mode Position and Damper Operation

   

   *1	Front Defroster	*2	Side Defroster
   *3	Fresh Air	*4	Recirculated Air
   *5	Blower with Fan Motor Sub-assembly	*6	No. 1 Cooler Evaporator Sub-assembly
   *7	Heater Radiator Unit Sub-assembly	*8	Quick Heater Assembly
   *9	Side Register	*10	Center Register
   *11	Upper Register	*12	Rear Footwell Register Duct
   *13	Footwell Register	-	-
   *a	Driver Side	*b	Passenger Side

   Control Damper	Operation Position		Damper Position	Operation
   Air Inlet Control Damper	FRESH		A	Brings in fresh air.
   	RECIRC		A	Recirculates internal air.
   Air Mix Control Damper	Temp. Setting: 16 °C (61 °F) to 32 °C (90 °F)		C - D - E (C'- D' -E')	Varies the mixture ratio of the fresh air and the recirculation air in order to regulate the temperature continuously from HOT to COLD.
   Mode Control Damper		DEF	H, K	Defrosts the windshield through the front defroster and side register.
   		FOOT / DEF	H, J	Defrosts the windshield through the front defroster and side register, while air is also blown out from the footwell register duct and rear footwell register duct.
   		FOOT	H, I	Air blows out of the footwell register duct, rear footwell register duct and side register. In addition, air blows out slightly from the front defroster.
   		BI-LEVEL	F, I	Air blows out of the center register, side register, footwell register duct and rear footwell register duct.
   		FACE	F, K	Air blows out of the center register and side register.

AIR OUTLETS AND AIRFLOW VOLUME

1. Air Outlets and Airflow Volume (for All Seat Control Modes)

   Mode		A	B	C	D	E	F
   		Center Register	Side Register	Footwell Register	Defroster	Console Box Register	Rear Heater Duct
   	FACE			-	-		-
   	BI－LEVEL				-
   	FOOT	-
   	FOOT/DEF	-
   	DEF	-		-		-	-

   The size of each circle ○ indicates the ratio of air flow volume.

   

INITIALIZATION CONTROL

1. Initialization:

   1. The air conditioning amplifier assembly sends control commands to the servo motors. In order to move the servo motors correctly, the base position (initialization point) must be detected.

      Click here

      

      *a

      Example

      Tip:

      During initialization (while the AUTO indicator is illuminated), no operations can be received.

2. Symptoms during initialization failure:

   Cause	Malfunction	Suspected Area	DTC	DTC Detection Condition
   Servo motor operation defective, position deviated	Foreign object caught in servo motor, damper gear stuck, etc.	Air conditioning unit assembly No. 1 air conditioning radiator servo motor sub-assembly No. 2 air conditioning radiator servo motor sub-assembly Gear, ring	DTC B1441/41 DTC B1442/42 DTC B1443/43 DTC B1449/49	The air conditioning amplifier assembly is unable to move the servo motors. As a result, the servo motor position detection pulse output remains constant, and a servo motor operation defective DTC is output after 30 seconds elapse.
   Servo motor locked	Single servo motor malfunctioning, stuck, etc.	No. 1 air conditioning radiator servo motor sub-assembly No. 2 air conditioning radiator servo motor sub-assembly	DTC B1441/41 DTC B1442/42 DTC B1443/43 DTC B1449/49	The air conditioning amplifier assembly is unable to move the servo motors. As a result, the servo motor position detection pulse output remains constant, and a servo motor operation defective DTC is output after 30 seconds elapse.
   BUS communication malfunction	Connector not connected properly, wire harness pinched	Harness or connector	DTC B1497	The air conditioning amplifier assembly outputs this DTC 10 seconds after a BUS communication malfunction occurs.
   Battery voltage drop (including open circuits)	Battery voltage drop when power switch on (IG) (including remote start)	Air conditioning amplifier assembly (battery voltage)	-	-
   No air conditioning amplifier assembly position information	Malfunction in CPU or air conditioning amplifier assembly internal memory which saves servo motor position data	Air conditioning amplifier assembly (battery voltage)	-	-

COMPRESSOR CONTROL

WINDOW FOG/FROST/ODOR PREVENTION