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


  1. GENERAL


    1. The air conditioning system has the following features:


      • The air conditioning amplifier assembly is equipped with a self-diagnosis function. If there is a malfunction in the system, it stores DTCs in its memory and the air conditioning switch indicator blinks.

      • The air conditioning amplifier assembly receives the vehicle speed signal from the combination meter.

      • The recirculation damper servo sub-assembly, air mix damper servo sub-assembly and mode damper servo sub-assembly rely on their built-in pulse sensors to detect their respective motor rotation angles.

      • The servo motor rotation angle zero point calibration is necessary in the following situations: 1) the servo motor deviates from the calibrated position, 2) the air conditioning amplifier assembly backup power source is cut, or 3) the air conditioning amplifier assembly or servo motor is replaced.

        For 1, when the ignition switch is turned off, zero point calibration of the air conditioning amplifier assembly is automatically performed. For 2 and 3, when the backup power source returns and the ignition switch is turned to ON, zero point calibration of the air conditioning amplifier assembly is automatically performed.

        While zero point calibration is being performed, the following occurs: 1) the DEF indicator blinks at 1 second intervals, but the air conditioning amplifier assembly other outputs are disabled; and 2) the air conditioning system switches do not function.

  2. MODE POSITION AND DAMPER OPERATION

    A01DZ2BE01
    Text in Illustration
    *A w/ PTC Heater - -
    *1 Blower with Fan Motor Sub-assembly *2 Heater Radiator Unit Sub-assembly
    *3 No. 1 Cooler Evaporator Sub-assembly *4 Front Defroster
    *5 Side Register *6 Center Register
    *7 Front Footwell Register Duct *8 Quick Heater and Accessory Assembly
    *a Fresh Air *b Recirculated Air

    Tech Tips

    This Illustration is damper operation image. The number and location of the dampers is different to the actual unit.

    Control Damper Operation Position Damper Position Operation
    Air Inlet Control Damper FRESH A Brings in fresh air.
    RECIRC B Recirculates internal air.
    Air Mix Control Damper MAX COLD - MAX HOT C, D, E Varies mixture ratio of cool air and warm air in order to regulate temperature continuously from HOT to COLD.
    Mode Damper FACE A01E2ED F, K Air blows out of the center registers and side register.
    BI-LEVEL A01DYMH F, J Air blows our of the center registers, side registers and foot well register ducts.
    FOOT A01DXR7 G, I Air blows out of the foot well register ducts and side register. In addition, air blows out slightly from the front defroster.
    FOOT/DEF A01E0UG H, I Defrosts the windshield through the front defroster and side register, while air is also blown out from the foot well register ducts.
    DEF A01DWRX H, K Defrosts the windshield through the front defroster and side register.

  3. AIR OUTLETS AND AIR FLOW VOLUME

    A01E1H4E01
    Indication Mode A B C D
    Center Side Footwell Defroster
    A01E2ED FACE A01E0ZX A01E0ZX - -
    A01DYMH BI-LEVEL A01E0Y0 A01E0Y0 A01DXGE -
    A01DXR7 FOOT - A01DXGE A01E0Y0 A01DXGE
    A01E0UG FOOT / DEF - A01DXGE A01E0Y0 A01E0Y0
    A01DWRX DEF - A01DXGE - A01E0Y0

    Tech Tips


    • The circle size (○) is proportional to the amount of air flow.

    • The same system is used for LHD and RHD vehicles.