Hyundai Kona: Controller / Heater & A/C Control Unit (DATC) Repair procedures

Hyundai Kona (OS) 2018-2026 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (DATC) Repair procedures

Self Diagnosis
1.
Self-diagnosis process.

  
•
When operating the self-diagnostics, the below fault(self-diagnostics code) will blink at 0.5 seconds interval on the temperature display settings(driver's side only) and the remaining symbols are OFF .
2.
Fault code display
(1)
Continuance operation : DTC code.
(2)
Continuance operation : DTC code.
(3)
STEP operation.
A. Nomal or one fault code is same as a continuance operation.
B. DTC code.

3.
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Display
Fail description
0
 Normal
11
 Incar sensor OPEN
12
 Incar sensor SHORT
13
 Ambient sensor OPEN
14
 Ambient sensor SHORT
17
 Evaporator sensor OPEN
18
 Evaporator sensor SHORT
19
 Driver temp door potentionmeter OPEN or SHORT
20
 Driver temp door potentionmeter Error
21
 Mode door potentionmeter OPEN or SHORT
22
 Mode door potentionmeter Error
25
 Intake door potentionmeter OPEN or SHORT
26
 Intake door potentionmeter Error
31
 Auto defog sensor (OPEN)
Auto defog sensor (SHORT)
32
 Passenger temp door potensionmeter OPEN or SHORT
40
 Auto defogging actuator OPEN or SHORT
41
 Defog door potentiometer Error
44
 Cluster anion generator Error
45
 APT CAN Signal Error
47
 RPM CAN Signal Error
48
 Vehicle speed CAN Signal Error
49
 Engine coolant temprature CAN Signal Error

4.
Fail safe
NO
Item
Fault
Fail Safe
1
 Incar sensor
 Open or Short
 Control with the value of 25°C(77.0°F)
2
 Amblent sensor
 Open or Short
 Control with the value of 20°C(67°F)
3
 Evaporator sensor
 Open or Short
 Control with the value of -2°C(28.4°F)
4
 Mode door potentiometer
 Open or Short
 Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
Fix vent position, while selecting IG ON → OFF.
Fix defrost position, while selecting floor purge.
5
 Temperature door potentiometer (MTC)
 Open or Short
 If temperature setting 1 - 7 step, fix at maximum cooling position.
If temperature setting 8 - 15 step, fix at maximum heating position.
6
 Temperature door potentiometer (DATC)
 Open or Short
 If temperature setting 17°C(62.6°F) - 24.5°C(76.1°F), fix at maximum cooling position.
If temperature setting 25°C(77°F) - 32°C(89.6°F), fix at maximum heating position.
7
 Intake door potentiometer
 Open or Short
 Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Crash Pad - "Crash Pad Lower Panel")
3.
Remove the crash pad garnish assembly [RH].
(Refer to Crash Pad - "Crash Pad Garnish Assembly [RH]")
4.
Remove the console upper front garnish.
(Refer to Floor Console - "Floor Console Assembly")
5.
After loosening the mounting screws, remove the A/C & heater controller unit (A).
6.
Disconnect the connector (A) and the air hose (B).
7.
To install, reverse the removal procedure.
  
•
Make sure the connector are connected in properly.
•
Replace any damaged clips (or pin-type retainers).
Heater & A/C Control Unit (DATC) Components and components location
Components Connector [A] Pin NO Function Pin NO Function 1 Battery ...

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