Hyundai Tucson (NX4) 2022-2026 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (Manual)

Hyundai Tucson: Controller / Heater & A/C Control Unit (Manual)

- Component

Connector Pin Function

Pin No	Connector A (Blower)	Connector B (Main)
1	Low	Battery (+)
2	Common	ISG B+
3	Ground	ILL+ (TAIL)
4	Middle Low	Sensor REF (+5V)
5	Middle High	Mode control actuator feedback
6	High	Temperature control actuator feedback
7		Intake actuator feedback
8		Evaporator temperautre sensor (+)
9		Ambient temperature sensor (+)
10		Mode control actuator (Vent)
11		Mode control actuator (DEF)
12		Temperature control actuator (Cool)
13		Temperature control actuator (Warm)
14		Intake actuator (FRE)
15		Intake actuator (REC)
16		-
17		-
18		-
19		Blower ON signal (Common)
20		ILL - (RHEO)
21		IGN2
22		IGN1
23		Blower INH
24		Blower IS
25		Blower PWM IN
26		-
27		Blower MAX signal
28		IBU Active Low
29		PTC realy 2
30		PTC ON signal
31		-
32		-
33		CAN FD (High)
34		CAN FD (Low)
35		-
36		Blower relay
37		ECV (+)
38		ECV (-)
39		Sensor ground
40		Ground

- Replacement

1.Disconnect the negative (-) battery terminal.

2.Remove the front monitor.(Refer to Body Electrical System - "Front Monitor")

3.Remove the heater & A/C control unit (A).

4.Install in the reverse order of removal.

• Replace any damaged clips.

• Make sure the connector is connected properly.

Controller

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Heater & A/C Control Unit (DATC)

- Components Connector Pin Function Pin NoConnector A 1Battery (+) 2IGN2 3IGN1 4Local CAN (High) 5Local CAN (Low) 6In-car sensor (+) 7- 8Sensor ground 9ISG B+ 10ILL+ (TAIL) 11- 12- ...

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