AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) SYSTEM DESCRIPTION

Mode Position and Damper Operation

Figure 1. w/ Headlight Cleaner System

*A	w/ PTC Heater	*B	w/ Cooler System
*1	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Upper Air Mix)	*2	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Lower Air Mix)
*3	Side Defroster LH	*4	Front Defroster
*5	Side Defroster RH	*6	No. 1 Blower Damper Servo Sub-assembly (Fresh/Recirculation) (Lower Side)
*7	No. 1 Blower Damper Servo Sub-assembly (Fresh/Recirculation) (Upper Side)	*8	Clean Air Filter
*9	Blower Motor with Fan Sub-assembly	*10	No. 1 Cooler Evaporator Sub-assembly
*11	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Air Mix Control Damper)	*12	Heater Radiator Unit Sub-assembly
*13	Quick Heater Assembly	*14	No. 2 Air Conditioning Radiator Damper Servo Sub-assembly (Mode Switching)
*15	Front Footwell Register LH	*16	Front Footwell Register RH
*17	Side Register LH	*18	Center Register
*19	Side Register RH	*20	Rear Footwell Register LH
*21	Rear Footwell Register RH	-	-
*a	Illustration Image View from [A]	*b	[A] View
*c	Recirculated Air	*d	Fresh Air

Functions of Main Dampers

Control Damper	Operation Position	Damper Position	Operation
Air Inlet Control Damper	FRESH	A1, B1	Allows fresh air to enter.
	RECIRCULATION	A2, B2	Causes internal air to recirculate.
Air Mix Control Damper	HI - LO	C1 - C2	Varies the mixture ratio of the fresh air and the recirculation air in order to regulate the temperature continuously from HI to LO.
		D2 - D1	Varies the mixture ratio of the fresh air and the recirculation air in order to regulate the temperature continuously from HI to LO.
Air Outlet Control Damper	DEF	F, H, K	Defrosts the windshield through the center defroster, side defrosters and side registers.
	FOOT/DEF	F, H, J to K	Defrosts the windshield through the center defroster, side defrosters and side registers, while air is also blown out from the front and rear footwell register ducts.
	FOOT	E, (E to F), H, J	Air blows out of the front and rear footwell register ducts and side registers. In addition, air blows out slightly from the center defroster and side defrosters.
	B/L	E, G to I, J to K	Air blows out of the center registers, side registers and front and rear footwell register ducts.
	FACE	E, G, K	Air blows out of the center registers and side registers.

Figure 2. w/o Headlight Cleaner System

*A	w/ Cooler System	-	-
*1	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Upper Air Mix)	*2	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Lower Air Mix)
*3	Side Defroster LH	*4	Front Defroster
*5	Side Defroster RH	*6	No. 1 Blower Damper Servo Sub-assembly (Fresh/Recirculation)
*7	Clean Air Filter	*8	Blower Motor with Fan Sub-assembly
*9	No. 1 Cooler Evaporator Sub-assembly	*10	No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Air Mix Control Damper)
*11	Heater Radiator Unit Sub-assembly	*12	No. 2 Air Conditioning Radiator Damper Servo Sub-assembly (Mode Switching)
*13	Front Footwell Register LH	*14	Front Footwell Register RH
*15	Side Register LH	*16	Center Register
*17	Side Register RH	-	-
*a	Illustration Image View from [A]	*b	[A] View
*c	Recirculated Air	*d	Fresh Air

Functions of Main Dampers

Control Damper	Operation Position	Damper Position	Operation
Air Inlet Control Damper	FRESH	A1	Allows fresh air to enter.
	RECIRCULATION	A2	Causes internal air to recirculate.
Air Mix Control Damper	HI - LO	B1 - B2	Varies the mixture ratio of cool air and hot air in order to regulate the temperature continuously from HI to LO.
		C2 - C1	Varies the mixture ratio of cool air and hot air in order to regulate the temperature continuously from HI to LO.
Air Outlet Control Damper	DEF	E, G, J	Defrosts the windshield through the center defroster, side defrosters and side registers.
	FOOT/DEF	E, G, I to J	Defrosts the windshield through the center defroster, side defrosters and side registers, while air is also blown out from the front footwell register ducts.
	FOOT	D, (D to E), G, I	Air blows out of the front footwell register ducts and side registers. In addition, air blows out slightly from the center defroster and side defrosters.
	B/L	D, F to H, I to J	Air blows out of the center registers, side registers and front footwell register ducts.
	FACE	D, F, J	Air blows out of the center registers and side registers.

The size of each circle ○ indicates the ratio of airflow volume.

1. Air Outlets and Airflow Volume.

   

   Mode	FACE		FOOT		DEF
   	Center	Side	Front	Rear*	Center	Side
   	A	B	C	D	E	F
   FACE
   B/L
   FOOT
   FOOT/DEF
   DEF

   
   

   • *: w/ Headlight Cleaner System

1. General:

   
   

   1. The compressor is a continuously variable capacity type in which its capacity can be varied in accordance with the cooling load of the air conditioning system.

      

      *1

      Shaft

      *2

      Solenoid Control Valve

2. Solenoid Valve Operation:

   
   

   1. The crank chamber is connected to the suction passage. A solenoid valve is provided between the suction passage (low pressure) and the discharge passage (high pressure).

   2. The solenoid valve operates under duty cycle control in accordance with the signals from the air conditioning amplifier assembly.

      

      *1	Suction Passage	*2	Crank Chamber
      *3	Piston	*4	Discharge Passage
      *5	Solenoid Control Valve	*6	Air Conditioning Amplifier Assembly

   3. When the solenoid valve closes (solenoid coil is energized), a difference in pressure is created and the pressure in the crank chamber decreases. Then, the pressure that is applied to the right side of the piston becomes greater than the pressure that is applied to the left side of the piston. This compresses the spring and tilts the swash plate. As a result, the piston stroke increases and the discharge capacity also increases.

      

      *1	Suction Passage	*2	Crank Chamber
      *3	Piston	*4	Discharge Passage
      *5	Solenoid Control Valve	*6	Air Conditioning Amplifier Assembly
      *a	Piston Stroke: Large	*b	Crank Chamber Pressure + Spring Force

   4. When the solenoid valve opens (solenoid coil is not energized), the difference in pressure disappears. Then, the pressure that is applied to the left side of the piston becomes the same as the pressure that is applied to the right side of the piston. Thus, the spring elongates and eliminates the tilt of the swash plate. As a result, there is no piston stroke, and the discharge capacity is reduced.

      

      *1	Suction Passage	*2	Crank Chamber
      *3	Piston	*4	Discharge Passage
      *5	Solenoid Control Valve	*6	Air Conditioning Amplifier Assembly
      *a	Piston Stroke: Small	*b	Crank Chamber Pressure + Spring Force

3. CS Valve Operation:

   
   

   1. The CS valve consists of passage A and passage B. If the vehicle is left parked for a long period, refrigerant may accumulate in the crank chamber due to the heat capacity difference.

   2. The solenoid control valve is controlled by the air conditioning amplifier assembly. While the compressor is operating, the solenoid control valve pushes down the CS valve rod and opens passage A.

   3. Under the above condition, only if the refrigerant accumulates in the crank chamber, the crank chamber pressure will become high. As a result, the bellows will contract because of the pressure difference with its internal pressure (vacuum), and opens passage B.

   4. This causes the accumulated refrigerant to be drawn in via passage A and passage B, clearing the accumulated refrigerant earlier and ensuring a more immediate cooling effect.

1. General

   
   

   1. The quick heater assembly is located above the heater core in the air conditioning radiator assembly.

   2. The quick heater assembly consists of a PTC element, aluminum fins, and brass plates. When current is applied to the PTC element, it generates heat to warm the air that passes through the unit.

      

      *1	Quick Heater Assembly	*2	Heat Resistant Resin Plate
      *3	Fin	-	-

2. Quick Heater Assembly Operating Conditions

   
   

   1. The quick heater assembly is turned on and off by the air conditioning amplifier assembly in accordance with the engine coolant temperature, ambient temperature, temperature setting, and electrical load (generator power ratio).