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


  1. 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.
      Left and Right Independent 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.
      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.
      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.
      Defroster Control Defroster control logic is used to improve defroster performance.
      Rear Defogger Control

      When the ignition switch is ON and the rear defogger switch is pushed, the system is activated to keep the defogger heater on for approximately 15 minutes. However, the operating time of the rear defogger can be extended up to approximately 45 minutes when both of the following requirements are met:


      • Ambient Temperature: -30°C (27°F) or below

      • Vehicle Speed: 45 km/h (28 mph) or more
      Diagnosis A Diagnostic Trouble Code (DTC) is stored in memory when the air conditioning amplifier detects a problem with the air conditioning system.

  2. MODE POSITION AND DAMPER OPERATION


    1. Mode Position and Damper Operation

      A00YUXMC01
      *A w/ PTC Heater - -
      *1 Front Defroster *2 Side Defroster
      *3 Fresh Air *4 Recirculated Air
      *5 Blower Motor *6 No. 1 Cooler Evaporator Sub-assembly
      *7 Heater Radiator Unit Sub-assembly *8 Quick Heater Assembly
      *9 Side Resistor *10 Center Resistor
      *11 Upper Resistor *12 Rear Footwell Resistor Duct
      *13 Footwell Resistor - -
      *a Driver Side *b Front Passenger Side
      Functions of Main Dampers
      Control Damper Operation Position Damper Position Operation
      Air Inlet Control Damper FRESH A Allows fresh air to enter.
      RECIRCULATION B Causes internal air to recirculate.
      Air Mix Control Damper Temperature Setting: 16°C (61°F) to 30°C (86°F)

      C - D - E

      (C' - D' - E')

      		 Varies the mixture ratio of the warm air and cool air in order to regulate the temperature continuously between hot and cold.
      Air Outlet Control Damper

      DEF

      A00YSOZ       		H, K Defrosts the windshield through the center defroster, side defrosters and side registers.

      FOOT / DEF

      A00YXX0       		H, J Defrosts the windshield through the center defroster, side defrosters, side registers, and rear center register, while air is also blown out from the front and rear footwell register ducts.

      FOOT

      A00YSGD       		H, I 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.

      BI-LEVEL

      A00YVFI       		F, I Air blows out of the front and rear center registers, side registers and front and rear footwell register ducts.

      FACE

      A00YRUW       		F, K Air blows out of the front and rear center registers, and side registers.

  3. AIR OUTLETS AND AIRFLOW VOLUME


    1. Air Outlets and Airflow Volume

      A00YV0QN02
      Indication Mode A B C D
      Center, Upper Side Lower Defroster
      A00YRUW FACE A00YS3A A00YS3A A00YRKD A00YRKD
      A00YVFI B/L A00YSTI A00YSTI A00YSTI A00YRKD
      A00YSGD FOOT A00YRKD A00YTYO A00YS3A A00YTYO
      A00YXX0 F/D A00YRKD A00YTYO A00YSTI A00YSTI
      A00YSOZ DEF A00YRKD A00YTYO A00YRKD A00YS3A

      The circle size (○) indicates the proportion of airflow volume.