Hyundai Elantra: Heater / Mode Control Actuator Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the mode control actuator connector.
3.
Verify that the mode control actuator operates to the defrost mode when connecting 12V to terminal 3 and grounding terminal 4.
Verify that the mode control actuator operates to the vent mode when connected in reverse.

Pin NO
Function
1
-
2
-
3
Vent mode
4
Sensor (+5V)
5
Feedback signal
6
Sensor ground
7
Defrost mode

4.
Connect the mode control actuator connector.
5.
Turn the ignition switch ON.
6.
Check the voltage between terminal 6 and 5.
7.
If the measured voltage is not within specification, check the operation by replacing the existing mode control actuator with a new genuine part. After that, determine whether replacement of the temperature control actuator is required or not.
Diagnosis With GDS
1.
The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
? The diagnostic system (GDS) provides the following information.
(1) Self diagnosis : Checking the failure code (DTC) and display.
(2) Current data : Checking the system input/output data state.
(3) Actuation test : Checking the system operation condition.
(4) Additional function : Other controlling such as he system option and zero point adjustment.
2.
Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.
3.
Select the 'Current data' menu to search the current state of the input / output data.
The input / output data for the sensors corresponding to the Mode Control Actuator can be checked.

4.
To perform compulsory operation on Mode Control Actuator input factors, select "ACTUATION TEST".

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the main crash pad assembly.
(Refer to Body - "Main Crash Pad Assembly")
3.
Disconnect the connector (A) and then remove the mode control actuator (B) after loosening the mounting screws.

4.
To intall, reverse the removal procedure.
Mode Control Actuator Specifications
Specifications Door positionVoltage (V)Error detectingMax. cooling0.3 ± 0.15 Low voltage : 0.1V or lessMax. heating4.7 ± 0.15 High voltage : 4.9V or more ...

Auto Defoging Actuator Components and Components Location
Components Location 1. Auto logging actuator ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Input Speed Sensor Repair procedures
Inspection 1. Using the GDS, check the input/output speed sensor waveforms. A. Turn OFF the ignition switch. B. Connect the GDS to the Data Link Connector(DLC) on the lower crash pad. C. Ignition "ON" & Engine "ON". D. Check the input/output speed sensor waveforms at high spe ...

Hyundai Elantra AD (2016-2020) Service Manual: Rear Door Latch Repair procedures
Replacement 1. Remove the rear door module. (Refer to Rear Door - "Rear Door Module") 2. Remove the rear door inside handle cage (A). 3. Disconnect the rear door latch connector (A). 4. Loosen the mounting bolt and remove the rear door latch (A). 5. Remove the rear door outside ...

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