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Control Logic

WARNING: This page is about a different car, the 2005 Kia Spectra5, 2005 Kia Spectra, and 2004 Kia Spectra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The manufacturer provides following information regarding control logistics. No additional information is available.
  1. Defroster, Mix control 
    1. When defroster or mix selected, A/C ON, A/C select and A/C output signal are ON, the A/C indicator shall maintain its prior status, working in the fresh mode to help defrost.
    2. When A/C OFF is selected, the A/C indicator goes out but A/C select and A/C output signal shall remain ON.
    3. In doing defroster logic, the user can select the fresh/recirculation mode or A/C.
    4. Detailed control logics are as follows:
    Fig 1: Control Logic Chart
    G00333139Courtesy of KIA MOTORS AMERICA, INC.
    NOTE:
    • When initial battery application and IG ON, Fresh and A/C ON with the defroster or mix is selected (Only when blower is ON).
    • A/C ON: A/C select & A/C output signal ON, A/C OFF: A/C select & A/C output signal OFF
    • Logic is reentered when Floor, Defroster and Mix is selected.
  2. Fresh/recirculation control in the Vent/Bi-level mode 
    1. With IG OFF --> ON or blower OFF, ON in the Vent/Bi-level mode, fresh/recirculation maintain the memory status.
    2. When returned to the Vent/Bi-level mode after being converted to the different mode, fresh/recirculation shall maintain the memory status.
  3. Initialization (Initial Battery Application) 
    1. With battery applied, It controls with A/C OFF and the fresh mode.
    2. With Defroster or MIX in the blower ON mode, it controls with A/C ON and the fresh mode.
  4. Memory Function 
    1. The system control status prior to IG OFF shall be remembered and IG ON shall be controlled with the status prior to IG OFF (A/C & Blower is ON).
    2. Fresh/Recirculation shall be controlled by fresh in the IG OFF, independently from the prior status of IG ON. (Memory is preserved in the vent/Bi-level mode)
    3. Defroster, Mix logic shall be redone (Which is done irrelevant with the status prior to IG OFF)
  5. MAX A/C Control 
    1. When MAX A/C is selected, it controls with A/C ON, Fresh and Vent.
    2. When MAX A/C is cancelled, A/C, fresh/recirculation, controlled following the prior status.
    3. A/C, fresh/recirculation cannot be selected by user (including the indicator)
    4. No change by the blower and temperature switch selection
  6. Fresh/recirculation control by the blower 
    1. With the Blower OFF, controlled by defroster and fresh
    2. Controlled by the mode that is selected with Blower OFF to ON and fresh/recirculation shall be controlled by fresh (Excluding vent and Bi-level).
  7. Floor selection control 
    1. When Floor is selected, controlled by fresh
  8. Key control 
    1. With IG OFF, fresh/recirculation is controlled by fresh for 10 +/- 1 seconds and the system is off.
    2. With IG ON, fresh/recirculation is non-conditionally controlled by fresh (Memory maintained in the vent or Bi-level mode).
  9. Compressor Control: Compressor ON/OFF 

    With A/C ON, the A/C output signal turns ON/OFF according to the temperature that is identified by the thermostat (Duct sensor) for the evaporator frost prevention.

    Fig 2: Compressor Cycling Chart
    G00333140Courtesy of KIA MOTORS AMERICA, INC.
  10. A/C Control 
    NOTE:
    1. At initial battery application, A/C OFF (A/C ON when the mode is mix, defroster, MAX A/C when the Blower is ON)
    2. When IG ON, A/C will be controlled by the prior status. (A/C ON when the mode is mix, defroster, MAX A/C)
    Fig 3: A/C Control Status Chart
    G00333141Courtesy of KIA MOTORS AMERICA, INC.
  11. Fresh/Recirculation Control 
    NOTE:
    1. With battery application and IG ON, control with fresh regardless of the prior status (With MAX A/C, control with recirculation).
    2. With IG ON, Fresh/recirculation is controlled by fresh (Fresh/recirculation maintain memory in the vent/Bi-level mode)
    3. With IG OFF, Fresh/recirculation is controlled by fresh for 10+/-1 seconds and the system is off.
    Fig 4: Fresh/Recirculation Control Status Chart
    G00333142Courtesy of KIA MOTORS AMERICA, INC.
  12. Dissolution & Reinstatement of logic 
    1. Turn off the blower switch.
    2. Move to defrost mode.
    3. Press the intake button more than 5 times within 3 seconds.
    4. Indicator of intake button is flashed 3 times.
    5. Dissolution & reinstatement of logic is completed.
    6. A/C and intake status is initialized to "A/C off" and "fresh status".
NOTE: When the battery happens to be disconnected or discharged, the logic is reinstated.
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