Kia Optima: Controller / Heater & A/C Control Unit (Manual)

Kia Optima DL3 2019-2025 Service and Repair Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (Manual)

Components and components location

Components

Connector Pin Function

[Connector A]

Pin NO	Funtion	Pin NO	Funtion
1	Battery (+)	21	IGN2
2	ILL+ (TAIL)	22	IGN1
3	Sensor REF (+5V)	23	-
4	Mode Control Actuator Feedback	24	-
5	Temperature Actuator Feedback	25	-
6	Intake Actuator Feedback	26	-
7	EVAP Sensor (+)	27	-
8	AMB Sensor (+)	28	-
9	-	29	CAN High
10	Max Blower signal	30	CAN Low
11	Blower on signal	31	-
12	Temperature Control Actuator (Warm)	32	HTD (Rear Defrost)
13	Temperature Control Actuator (Cool)	33	P_CAN High
14	Intake Actuator (Recirculated Air)	34	P_CAN Low
15	Intake Actuator (Fresh Air)	35	-
16	Mode Control Actuator (Defrost)	36	-
17	Mode Control Actuator (Vent)	37	-
18	Sensor Ground	38	ECV+
19	ILL - (RHEO)	39	ECV- (Ground)
20	Ground	40	Ground

[Connector B]

Pin NO	Funtion	Pin NO	Funtion
1	Low	4	Middle Low
2	Common	5	Middle High
3	Ground	6	High

Repair procedures

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Using a screwdriver or remover, remove the floor console upper garnish (A).

3.	Loosen the mounting screws and remove the A/C & heater controller unit (A).

4.	Disconnect the A/C & heater control connectors (A).

To install, reverse the removal procedure.

•	Make sure the connector are connected in properly.

•	Replace any damaged clips (or pin-type retainers).

Controller

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Heater & A/C Control Unit (DATC)

Components and components location Components Connector Pin NO Funtion Pin NO Funtion 1 Ground ...

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