Hyundai Tucson: Controller / Heater & A/C Control Unit(Dual) Repair procedures

Hyundai Tucson (LM) 2010-2015 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit(Dual) Repair procedures

Self Diagnosis

1.	Self-diagnosis process

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
25	Intake door potentiometer open
26	Intake door potentiometer short
32	Temp door potentiometer open/short - Passenger
33	Temp door potentiometer fault - Passenger
45	APT CAN signal fault
46	-
47	RPM CAN signal fault
48	Vehicle speed CAN signal fault
49	Engine coolant temp CAN signal fault
50	Cluster ion generator fault

Fault code display

(1)	Continuance operation : DTC code is one.

(2)	Continuance operation : DTC code is more two.

(3)

STEP operation

A.	Nomal or one fault code is same as a continuance operation.

B.	DTC code os more two.

4.	If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.

Fail safe

(1)	In-car temperature sensor: Control with the value of 23°C(73.4°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 85°C(185°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.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the under cover (A).

3.	Remove the console upper cover (B).

4.	Remove the connectors (A).

5.	Using the screwdriver, remove the center facia lower cover (A).

6.	Using the screwdriver, remove the center facia lower switch assembly (A).

7.	Disconnect the connectors and then remove the center facia lower switch assembly (A).

8.	Loosen the control panel mounting screws and then remove the control panel (A).

9.	Disconnect the connectors (A).

10.	Install in the reverse order of removal.

Heater & A/C Control Unit(Dual) Components and Components Location

Components Control Panel Connector Pin Function ConnectorPin NOFunctionConnectorPin NOFunctionConnector(A)1BatteryConnector(B)1CAN (LOW)2Tail Lamp (ILL+)2CAN (HIGH)3IG23Intake Actuator (F/B)4DR ...

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