Hyundai Santa Cruz (NX4A OB) 2021-2025 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (Manual)

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

- Terminal Function

Connector Pin Function

Pin No	Connector A	Pin No	Connector A
1	Battery	17	IGN2
2	ISG B+	18	IGN1
3	ILL+ (TAIL)	19	Blower Relay
4	Sensor REF (+5V)	20	Blower INH
5	Mode Actuator Feedback	21	Blower IS
6	Temperature Actuator Feedback	22	Blower PWM IN
7	Intake Actuator Feedback	23	-
8	Evaporator Temperature Sensor (+)	24	PTC Relay
9	Ambient Temperature Sensor (+)	25	-
10	Mode Actuator (Vent)	26	E_CAN High
11	Mode Actuator (Defrost)	27	E_CAN Low
12	Temperature Control Actuator (Cool)	28	-
13	Temperature Control Actuator (Warm)	29	ECV +
14	Intake Actuator (Fresh Air)	30	ECV - (Ground)
15	Intake Actuator (Recirculated Air)	31	Sensor Ground
16	ILL- (RHEO)	32	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)

- Terminal Function Connector Pin Function Pin NoConnector A 1Battery (+) 2- 3- 4LIN BUS (Climate control) 5- 6- 7- 8- 9IGN2 10ISG B+ 11IGN1 12- 13Incar sensor (+) 14- 15Sensor G ...

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