AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE

Note


  • If the battery voltage is low, the heater may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the battery, referring to On-vehicle Inspection for the charging system.

    Click here

  • If the battery voltage is low, the heater may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

    Click here

  • Before replacing the ECM, refer to Service Bulletin.

Tech Tips


  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.


  1. DISPLAY RELATED:

    Symptom Suspected Area Link

    Operations are never accepted by the integration control and panel assembly.


    • (With the exception of the switch indicator, everything is turned off.)

    • Air conditioning amplifier assembly

    • Blower with fan motor sub-assembly

    • Integration control and panel assembly

    • Evaporator or heater core fin clogging

    • Clean air filter clogging

    Click here

    Operations are never accepted by the integration control and panel assembly.


    • (LCD panel displayed.)

    		 Integration control and pane assembly

    Click here

    Operations are never accepted by the integration control and panel assembly only immediately after starting the engine.


    • (LCD panel displayed.)

    • (Only AUTO indicator illuminates.)

    • (A/C stop light does not illuminate.)

    		 Refer to "INITIALIZATION"

    Click here

    A/C switch display turns off.

    • Air conditioning amplifier assembly

    • Radio receiver assembly

    • A/C switch (multi-display)

    • Malfunction in one of the servo motors (initialization incomplete)

    • Damper and link operation (jamming)

    • Low ambient temperature (including thermistor assembly)

    Click here

    With the engine switch turned off, start the engine with the air conditioner off.


    • (Starts at 25.0 when AUTO is pressed.)

    • Air conditioning amplifier assembly (+B short)

    • Malfunction in one of the servo motors (initialization incomplete)

    • Damper and link operation (jamming)

    Click here

  2. COOLING FUNCTION:

    Symptom Suspected Area Link

    No cooling at all.


    • (Air is discharged.)

    • Cooler compressor assembly

    • Refrigerant pressure malfunction

    • Lack of refrigerant

    • Dirty cooler condenser

    • Cooling fan system malfunction

    • Damper and link operation (jamming)

    • No. 1 cooler thermistor (determined as cold, conflicting with actual temperature)

    • Warm air flow

    Click here


    • Cooling is poor.

    • Takes time to cool down.

    • ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected)

    • Cooler compressor assembly

    • Excessive refrigerant

    • Lack of refrigerant

    • Dirty cooler condenser

    • Cooling fan system malfunction

    • Damper and link operation (jamming)

    • Automatic light control sensor

    • Warm air flow

    Click here

    Different temperature for left and right air outlets.


    • (Left and right stand-alone type)

    • Cooler compressor assembly

    • Lack of refrigerant

    • Damper and link operation (jamming)

    • Automatic light control sensor

    • Warm air flow

    Click here

    Refrigerant pressure does not decrease even with the A/C switch turned off.

    • Air conditioning amplifier assembly

    • Blower with fan motor sub-assembly

    • Integration control and panel assembly

    • Evaporator or heater core fin clogging

    • Clean air filter clogging

    Click here

  3. HEATER FUNCTION:

    Symptom Suspected Area Link

    • No heating at all.


      • (Airflow volume control is normal.)

    • Air outlet temperature does not increase.


      • (Airflow volume control is normal.)

    • Low engine coolant temperature

    • Lack of refrigerant

    • Air mix damper servo motor

    • Warm-up Control

    • Heater core closed waterway

    • Heater accessory assembly

    Click here

    Different temperature for left and right air outlets.


    • (Either left or right is warm.)

    • Heater accessory assembly (low water)

    • Damper and link operation (jamming)

    • Heater core closed waterway

    Click here

  4. BLOWER RELATED:

    Symptom Suspected Area Link

    Blower does not operate at all.


    • (No air comes out.)

    • Blower with fan motor sub-assembly (battery and ground circuit)

    • Control signal malfunction between air conditioning assembly and blower with fan motor sub-assembly

    • Blower with fan motor sub-assembly

    • Air condition amplifier assembly

    • Warm-up Control

    • Water temperature sensor

    Click here

    Blower airflow volume cannot be changed.

    • Air conditioning amplifier assembly

    • Blower with fan motor sub-assembly

    • Integration control and panel assembly

    • Evaporator or heater core fin clogging

    • Clean air filter clogging

    Click here


    • Blower airflow volume is continuously weak.


    • Blower airflow volume is sometimes weak.

    • Communication signal malfunction between air conditioning assembly and blower with fan motor sub-assembly

    • Blower with fan motor sub-assembly

    • Air condition amplifier assembly

    • Evaporator or heater core fin clogging

    • Clean air filter clogging

    • ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected)

    • Aspirator loser

    Click here

  5. INTAKE RELATED:

    Symptom Suspected Area Link

    • Fresh/recirculation mode changes without permission.

    • Fresh/recirculation mode light blinks.

    • Change of frash air temperature

    • Refrigerant pressure drop

    • Pressure sensor circuit

    • High engine coolant temperature

    Click here

    Fresh/recirculation mode changes without permission.

    • Automatic function set to ON in the customize setting

    • Change of frash air temperature

    • Refrigerant pressure drop

    • Pressure sensor circuit

    • High engine coolant temperature

    • Smog ventilation sensor false opinion on Infringement

    Click here


    • Fresh/recirculation mode does not change.

    • Fresh/recirculation mode does not change automatically.

    • Exhaust gas odor when set to recirculation.

    • Servo motor module

    • Servo motor

    • Link drop

    • Foreign object jammed in door

    • High engine coolant temperature

    • Smog ventilation sensor false opinion on Infringement

    Click here

  6. AIR OUTLED RELATED:

    Symptom Suspected Area Link

    Air vent cannot be changed.


    • (Display changes)

    • Servo motor module

    • Servo motor

    • Link drop

    • Air conditioning unit

    Click here

    Air vent cannot be changed.


    • (Display does not change)

    		 Integration control and panel assembly

    Click here

  7. DEFFOGER RELATED:

    Symptom Suspected Area Link

    Front glass fogs up.


    • (Does not cool)

    • Cooler compressor assembly

    • Quantity of refrigerant gas lack

    • Cooler expansion valve (opened too far)

    • Servo motor malfunction

    • Damper and link operation (jamming)

    Click here