Hyundai Accent (HC): Heater / Mode Control Actuator

Hyundai Accent (HC) (2017 - 2022) Service Manual / Heating, Ventilation and Air Conditioning / Heater / Mode Control Actuator

- Components Location

1. Mode control actuator


- Description The mode control actuator is located at the heater unit.It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit. Pressing the mode select switch makes the mode control actuator shift in order of Vent → Bi-Level → Floor → Mix. - Specifications
Door positionVoltage (V)Error detecting
Vent0.3 ± 0.15 Low voltage : 0.1V or less
Defrost4.7 ± 0.15 High voltage : 4.9V or more

- 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 6 and grounding terminal 5.Verify that the mode control actuator operates to the vent mode when connected in reverse.

Pin NOFunction
1-
2-
3Defrost mode
4Sensor ground
5Feedback signal
6Sensor (+5V)
7Vent 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.Remove the BCM (Body Control Module) cluster.(Refer to Body Electrical System - "BCM (Body Control Module)")

4.Disconnect the connector (A) and then remove the mode control actuator (B) after loosening the mounting screws.

5.To install, reverse the removal procedure.

Temperature Control Actuator

Auto Defoging Actuator

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: TJ Joint

- Components [RH] 1. BJ assembly 2. BJ circlip 3. BJ boot band 4. BJ boot 5. Dynamic damper band 6. Dynamic damper7. Shaft8. TJ boot band9. TJ boot10. Spider assembly11. Snap ring12. TJ case13. Clip [LH] 1. BJ assembly 2. Circlip 3. BJ boot band 4. BJ boot 5. Shaft6. TJ boot band7. TJ boot8. Spider assembly9. Snap ring10. TJ Case11. Clip - Disassembly     • Special grease must be applied to the driveshaft joint.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Heated Oxygen Sensor (HO2S)

- Description Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed on upstream and downstream of the Warm up Catalytic Converter (WCC).After it compares oxygen consistency of the atmosphere with the exhaust gas, it transfers the corresponding voltage signal to the ECM.In order that this sensor normally operates, the temperature of the sensor tip must be higher than predetermined temperature.

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