AIR CONDITIONING SYSTEM DETAILS


  1. SYSTEM CONTROL


    1. The ON/OFF function of the PTC heater is controlled by the PTC heater ECU in accordance with the water temperature, engine speed, air mix lever position* and electrical load (alternator power ratio). For example, heating value of the PTC heaters varies with the water temperature as in the graph below.

      *: The MAX HOT switch turns ON only when the air mix lever position is at MAX HOT.

      A01KAH9E01

  2. CONSTRUCTION


    1. Heater Blower Unit


      1. For the purpose of improving its heating performance, a recirculation air mixing door that can partially mix the recirculation air while operating in the fresh-air mode has been provided in the heater blower unit. This door is automatically opened and closed by the vacuum that is created when the blower fan operates, without requiring the driver to control it.

        A01KAEWE01
        Text in Illustration
        *1 Blower Fan *2 Clean Air Filter
        *3 Recirculation Air Mixing Door *4 Recirculation Air/Fresh-Air Switchover Damper
        A01KAGS Internal Air A01KAIP External Air

    2. Heater Core


      1. A compact, lightweight, and highly efficient straight flow (full-path flow) aluminum heater core has been adopted.

        A01KAGAE01
        Text in Illustration
        *A Straight Flow *B U-turn Flow (Reference)
        A01KAGS Flow of Engine Coolant - -

    3. Air Filter


      1. An internal air filter, which removes dust, is provided in the blower unit as standard equipment. It is positioned below the blower fan in the blower case in order to clean the fresh air that is introduced into the cabin as well as the air that is being recirculated in the cabin.

        A01KAGYE01
        Text in Illustration
        *1 Internal Air Filter *2 Washer Tank
        *3 Instrument Cluster Finish Panel - -

        Tech Tips

        This air filter requires cleaning at driving after every 10,000 km or cleaning every year. However, it varies with the use conditions (or environment).

      2. External air filter to remove the dust coming from outside has been established at the external air inlet inside the front grille.

        A01KA5RE01
        Text in Illustration
        *1 Front Grille (Remove it) *2 External Air Filter

        Tech Tips

        This air filter requires cleaning at driving after every 10,000 km or cleaning every year. However, it varies with the use conditions (or environment).

    4. Rear Heater


      1. The heater unit is located on the floor below the center of the rear seat.

      2. A temperature control lever that is directly coupled to the water valve is provided on the heater unit.

        A01KAC7E01
        Text in Illustration
        *1 Fan Speed Control Switch *2 Temperature Control Lever
        *3 Temperature Control Lever *4 Heater Core
        *5 Water Valve - -
        *a A-A Cross Section - -

    5. PTC Heater Control


      1. The PTC heater is positioned in front of the heater core in the air conditioner unit.

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

        A01KAGIE01
        Text in Illustration
        *1 PTC Heater *2 PTC Element
        *3 Brass Plate *4 Aluminum Fin
        *5 Heater Core - -
        *a Front - -

  3. OPERATION


    1. Air Outlets and Airflow Volume

      A01KA9PE01
      Indication Mode A B C D
      Center Side Foot Defroster
      A01KACJ FACE A01KA8I A01KA8I - -
      A01KA90 BI-LEVEL A01KA7F A01KA7F A01KA7F -
      A01KADB FOOT - A01KA7F A01KA8I -
      A01KACR FOOT/DEF - A01KA7F A01KA7F A01KA7F
      A01KAI5 DEF - A01KA7F - A01KA8I

      • ○ : The airflow volume is represented by the size of the circle.