Hyundai Elantra: Heater / Evaporator Core Repair procedures

Hyundai Elantra AD (2016-2020) Service Manual / Heating, Ventilation and Air Conditioning / Heater / Evaporator Core Repair procedures

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the heater and blower assembly. (Refer to Heater - "Heater Unit")

3.	Remove the heater unit lower case (A) after loosening the mounting screws.

4.	Pull out the evaporator core (A) from the heater unit.

To intall, reverse the removal procedure.

A.	If you're installing a new heater core, add refrigerant oil (PAG OIL).

B.	Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a to avoid leakage.

C.	Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.

D.	Do not spill the refrigerant oil on the vehicle; it may damage the paint, if the refrigerant oil contacts the paint, wash it off immediately.

E.	Apply sealant to the grommets.

F.	Make sure that there is no air leakage.

G.	Charge the system and test its performance.

H.	Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.

PTC Heater Repair procedures

Inspection Operating Logic Test (Manual only) Inspect the PTC operation by confirmation logic as follows. 1. Entering (1) Set the Floor mode and maximum heating position. (2) Turn off the ...

Temperature Control Actuator Components and Components Location

Components Location 1. Temperature control actuator [LH]2. Temperature control actuator [RH] ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: 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 IGN125Sensor REF (+5V)3HTD (Rear defog indicator)26EVAP sensor (+)4Detent Out (-)27AMB sensor (+)5PTC ...

Hyundai Elantra AD (2016-2020) Service Manual: ETC (Electronic Throttle Control) System Troubleshooting
Fail-Safe Mode ItemFail-SafeETC MotorThrottle valve stuck at 7°TPSTPS 1 faultReplace it with TPS 2TPS 2 faultReplace it with TPS 1TPS 1,2 faultThrottle valve stuck at 7°APSAPS 1 faultReplace it with APS 2APS 2 faultReplace it with APS 1APS 1,2 faultEngine idle state ...