Hyundai Elantra: Controller / Heater & A/C Control Unit (Manual) Repair procedures

Hyundai Elantra AD (2016-2020) Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (Manual) Repair procedures

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the glove box upper cover assembly. (Refer to Body - "Glove Box Upper Cover Assembly")

3.	Loosen the mounting screws and remove the crash pad center lower cover [LH](A).

4.	After loosening the mounting screws, remove the A/C & heater controller unit (A).

5.	Disconnect the A/C & heater controller connectors (A) and hose (B).

To intall, 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 ConnectorPin NOFunctionConnectorPin NOFunctionA1LowB18ILL- (RHEO)2Common19Sensor ground3Ground20Ground4Middle Low21Battery (+)5Middle High22ISG DC6High23ISG B+B1IGN224ILL+ (TAIL)2PAB I ...

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

Components ConnectorPin NOFunctionConnectorPin NOFunctionA1Battery (+)A21IGN12IGN222ILL+ (TAIL)3ISG B+23Sensor ground REF (+5V)4Mode control actuator (Vent)24C_CAN High5Mode control actuator (Def ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: System Malfunction
Check Driver Attention Warning (DAW) system When the warning message appears, the system is not working properly. In this case, have the vehicle inspected by an authorized HYUNDAI dealer. WARNING The Driver Attention Warning system is not a substitute for safe driving practices, but a c ...

Hyundai Elantra AD (2016-2020) Service Manual: Auto Defoging Actuator Specifications
Specifications Door positionVoltage (V)Error detectingMax. cooling0.3 ± 0.15Low voltage : 0.1V or lessMax. heating4.7 ± 0.15High voltage : 4.9V or more ...