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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (Heater & A/C Control Unit (HEV)) >> Heater & AC Control Unit(Dual) >> Repair Procedures >> Self Diagnosis

Self Diagnosis

WARNING: This page is about a different variant/trim than selected.
  1. Self-diagnosis process
    Fig 1: Self-Diagnosis Process Chart
    G11818559Courtesy of KIA MOTORS AMERICA, INC.
  2. How to read self-diagnostic code

    After the display panel flickers three times every 0.5 second, the corresponding fault code flickers on the setup temperature display panel every 0.5 second and will show two figures. Codes are displayed in numerical format

    Fault code 

    Display Fail description
    00 Normal
    11 In-car sensor open
    12 In-car sensor short
    13 Ambient sensor open
    14 Ambient sensor short
    17 Evaporator sensor open
    18 Evaporator sensor short
    19 Temp door potentiometer open/short - Drive
    20 Temp door potentiometer fault - Drive
    21 Mode door potentiometer open/short
    22 Mode door potentiometer fault
    23 Auto defog sensor open
    24 Auto defog sensor short
    25 Intake door potentiometer open
    26 Intake door potentiometer short
    32 Temp door potentiometer open/short - Passenger
    33 Temp door potentiometer fault - Passenger
    43 Defog door potentiometer open/short
    44 Defog door potentiometer fault
    45 APT CAN signal fault
    47 RPM CAN signal fault
    48 Vehicle speed CAN signal fault
    49 Engine coolant temp CAN signal fault
    50 Cluster ion generator fault
    71 ECV fault (open)
  3. Fault code display
    1. Continuance operation: DTC code is one.
      Fig 2: DTC Code Timing Pattern (One)
      G11818560Courtesy of KIA MOTORS AMERICA, INC.
    2. Continuance operation: DTC code is more two.
      Fig 3: DTC Code Timing Pattern (Two)
      G11818561Courtesy of KIA MOTORS AMERICA, INC.
    3. STEP operation
      1. Normal or one fault code is same as a continuance operation.
      2. DTC code as more two.
      Fig 4: DTC Code Timing Pattern (Two Or More)
      G11818562Courtesy of KIA MOTORS AMERICA, INC.
  4. If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
  5. Fail safe
    1. In-car temperature sensor: Control with the value of 25°C(77°F)
    2. Ambient temperature sensor: Control with the value of 20°C(67°F)
    3. Evaporator temperature sensor: Control with the value of -2°C(28.4°F)
    4. Water temperature sensor: Control with the value of -2°C(28.4°F)/Estimated torque calculation: 90°C(194°F)
    5. Temperature control actuator (Air mix potentiometer):

      If temperature setting 17°C-24.5°C, fix at maximum cooling position.

      If temperature setting 25°C-32°C, fix at maximum heating position.

    6. Mode control actuator (Direction potentiometer):

      Fix vent position, while selecting vent mode.

      Fix defrost position, while selecting all except vent mode.

    7. Intake control actuator:

      Fix fresh position, while selecting fresh mode.

      Fix recirculation position, while selecting recirculation mode.