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


  1. GENERAL


    1. The air conditioning system has the following controls.

      Control Outline
      Manual Control The air conditioning amplifier assembly controls the damper positions (air inlet control damper, air mix control damper and mode control damper) and blower speed in accordance with the positions of the switches (temperature control dial, blower dial, mode operation switch and REC/FRS switch).
      Air Inlet Control Drives the recirculation damper servo sub-assembly according to the operation of the REC/FRS switch and moves the dampers to the fresh or recirculation position.
      Compressor Control The air conditioning amplifier assembly compares the A/C pulley speed signals, which are transmitted by the ECM (crankshaft position sensor). When the air conditioning amplifier assembly determines that the A/C pulley is locked, it turns off the magnet clutch assembly.
      Defroster Control Defroster control logic is used to improve defroster performance.
      Defroster Fresh Air Mode Switching Control Defroster fresh air mode switching control changes the system from recirculation air mode to fresh air mode 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 approx. 15 minutes. However, the operating time of the rear defogger can be extended up to approx. 255 minutes when both of the following requirements are met:


      • Ambient Temperature: -3°C (26.6°F) or less

      • Vehicle Speed: 50 km/h (31.1 mph) or more
      Diagnosis A Diagnostic Trouble Code (DTC) is stored in memory when the air conditioning amplifier assembly detects a problem with the air conditioning system.

  2. MODE POSITION AND DAMPER OPERATION


    1. Mode Position and Damper Operation


      1. Front Air Conditioning Unit

        A00JVM6E02
        Function of Main Damper
        Control Damper Operation Position Damper Position Operation
        Air Inlet Control Damper Fresh A Brings in fresh air.
        Recirculation B Recirculates internal air.
        Air Mix Control Damper MAX COOL to MAX HOT E - D - C Varies the mixture of cold air and hot air in order to regulate the temperature continuously from hot to cool.
        MAX COOL Damper MAX COOL V Open in the MAX COOL position.
        Except MAX COOL W Close in all position except MAX COOL position.
        MAX HOT Damper MAX HOT Y Open in the MAX HOT position.
        Except MAX HOT X Closed in all position except MAX HOT position.
        Mode Control Damper A00JV3I

        Face

        		 F, I, N, T, X Air blows out of the front center registers, side registers and rear face registers.
        A00JVH8

        Bi-level

        		 G, L, N, T, X Air blows out of the front center registers, side registers, rear face registers and front and rear footwell register ducts.
        A00JWZ8

        Foot

        H, M, P, T, W, Y (MAX HOT position)

        H, M, O, T, X (Except MAX HOT position)

        Air blows out of the front and rear footwell register ducts.

        In addition, air blows out slightly from the front defroster, side registers, front center registers and rear face registers.
        A00JUB4

        Foot/Def

        H, K, R, T, W, Y (MAX HOT position)

        H, M, Q, T, X (Except MAX HOT position)

        Defrosts the windshield through the front defroster and side registers while air is also blown out from the front and rear footwell register ducts.

        In addition, air blows out slightly from the front center registers and rear face registers.
        A00JWPZ

        Def

        		 H, I, S, U, X Defrosts the windshield through the front defrosters.

      2. Rear Air Conditioning Unit (w/ Rear Air Conditioning System)

        A00JV20E03
        Function of Main Damper
        Control Damper Operation Position Damper Position Operation
        Mode Control Damper A00JV3I

        Face

        		 A Air blows out from the rear roof registers.
        A00JVH8

        Bi-level

        		 B Air blows out from the rear roof registers and rear side registers.
        A00JWZ8

        Foot

        		 C Air blows out from the rear side registers.
        Air Mix Control Damper MAX COLD to MAX HOT Temperature Setting D, E Varies the mixture of cold air and hot air in order to regulate the temperature continuously from hot to cold.

  3. AIR OUTLETS AND AIRFLOW VOLUME


    1. Air Outlets and Airflow Volume


      1. for Front Registers

        A00JWQRE01

        Indication

        (Mode)

        		 Front Center Register Side Register Front Footwell Register Rear Face Register Rear Footwell Register Front Defroster
        A B C D E F
        A00JV3I

        Face

        		 A00JW64 A00JW64 - A00JTUX - -
        A00JVH8

        Bi-level

        		 A00K28I A00K28I A00K28I A00JTUX A00JTUX -
        A00JWZ8

        Foot

        		 A00JXME A00JXME A00JW64 A00JXME A00K28I A00JXME
        A00JUB4

        Foot/Def

        		 A00JXME A00JXME A00K28I A00JXME A00K28I A00JTUX
        A00JWPZ

        Def

        		 - - - - - A00JW64

        Tech Tips


        • The size of the circle indicates the proportion of airflow volume.

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

      2. for Rear Registers (w/ Rear Air Conditioning System)

        A00JTY8E01

        Indication

        (Mode)

        		 Rear Roof Register Rear Side Register
        A B
        A00JV3I

        Face

        		 A00JW64 -
        A00JVH8

        Bi-level

        		 A00JTUX A00JXME
        A00JWZ8

        Foot

        		 - A00K28I

        Tech Tips

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

  4. A/C LOCK SENSOR (except 5L-E)

    The A/C lock sensor sends A/C pulley speed signals to the air conditioning amplifier assembly. The air conditioning amplifier assembly determines whether the A/C compressor is locked or not by using those signals and engine speed signals.

  5. No. 1 COOLER THERMISTOR

    The No. 1 cooler thermistor detects the temperature of the cool air immediately after it passes through the evaporator in the form of resistance changes, and outputs the temperature to the air conditioning amplifier assembly.

  6. BLOWER WITH FAN MOTOR SUB-ASSEMBLY

    The blower with fan motor sub-assembly has a built-in blower controller, and is controlled by the air conditioning amplifier assembly using duty control.

  7. AIR CONDITIONING HARNESS ASSEMBLY (BUS CONNECTOR)


    1. A BUS connector is used in the wire harness that connects the servo motor to the air conditioning amplifier assembly.

      A00JYIFE02
      Connector Type Connected to
      *1: Bus connector Damper servo sub-assembly LH (mode damper servo)
      *2: Bus connector Damper servo sub-assembly RH (air mix damper servo)
      *3: Bus connector Recirculation damper servo sub-assembly
      *4: Bus connector Air conditioning amplifier assembly
      *5: Connector No. 1 cooler thermistor

    2. Each BUS connector has a built-in communication/driver IC which communicates with each servo motor connector, actuates the servo motor, and has a position detection function.

      A00JYUWE01

  8. SERVO MOTOR


    1. The pulse pattern type servo motor detects the relative position using 2-bit on/off signals.

      The forward and reverse revolutions of this motor are detected using two signals, A and B, which output four types of patterns. The air conditioning amplifier assembly counts the number of pulse patterns in order to determine the stopped position.

      A00JYOFE01

  9. COOLER THERMISTOR (AMBIENT TEMPERATURE SENSOR)

    The cooler thermistor (ambient temperature sensor) detects the outside temperature based on changes in the resistance of its built-in thermistor and sends a signal to the air conditioning amplifier assembly.