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: Resetting the System
The last break time is set to 00:00 and the driver's attention level is set to 5 (very attentive) when the driver resets the Driver Attention Warning (DAW) system. The Driver Attention Warning (DAW) system resets in the following situations. - The engine is turned OFF. - The drive ...

Hyundai Elantra AD (2016-2020) Owners Manual: Service information
If the remaining mileage or time reaches 900 miles (1,500 km) or 30 days, the service symbol () will blink for several seconds each time you set the ignition switch or Engine Start/Stop button to the ON position. Information To change or deactivate the service interval, consult an authoriz ...