Kia Optima DL3: Controller / Heater & A/C Control Unit (DATC)

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

Components and components location

Components

Connector

Pin NO	Funtion	Pin NO	Funtion
1	Ground	9	Ground
2	ILL-	10	-
3	-	11	-
4	-	12	-
5	HTD	13	LIN BUS
6	-	14	ISG B+
7	ILL+	15	IGN2
8	IGN1	16	Battery (+)

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.

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 connector (A).

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 (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.

Heater Control Unit❯

Components and components location Components Connector Pin Function [Connector A] Pin NO Funtion Pin NO Funtion 1 Ground 11 Ground 2 Clean signal 12 - 3 Humidity 13 - 4 Diagnosis (Ionizer) 14 Driver Temperature Control Actuator Feedback 5 Ambient Temperature Sensor (+) 15 Passenger Temperature Control Actuator Feedback 6 Evaporator Temperature Sensor (+) 16 Intake Actuator Feedback 7 Right Photo Sensor (-) 17 Mode Control Actuator Feedback 8 Left Photo Sensor (-) 18 Auto Defogging Actuator Feedback 9 CAN Low 19 - 10 CAN High 20 - [Connector B] Pin NO Funtion Pin NO Funtion 1 Passenger Temperature Control Actuator (WARM) 11 - 2 Passenger Temperature Control Actuator (COOL) 12 - 3 Auto Defogging Actuator (CLOSE) 13 - 4 Auto Defogging Actuator (OPEN) 14 - 5 Driver Temperature Control Actuator (COOL) 15 - 6 Driver Temperature Control Actuator (WARM) 16 - 7 Intake Actuator (REC) 17 - 8 Intake Actuator (FRE) 18 Blower Motor (+) 9 Mode Control Actuator (DEF) 19 FET Drain Feedback 10 Mode Control Actuator (VENT) 20 FET (GATE) [Connector C] Pin NO Funtion Pin NO Funtion 1 Battery (+) 9 IGN1 2 IGN2 10 - 3 LIN BUS 11 - 4 Sensor REF (+5V) 12 - 5 - 13 - 6 ECV (+) 14 - 7 ECV (-) Ground 15 - 8 Ground 16 Sensor Ground Repair procedures Replacement 1.

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