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

Hyundai Kona (OS) 2018-2025 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (DATC) Repair procedures

Self Diagnosis

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 .

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.

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)
31	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

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).

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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