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: Compressor

- Components 1. Clutch bolt2. Limiter & Hub assembly3. Clutch hub spacer4. Snap ring5. Pulley6. Clutch magnetic coil7. Compressor assembly8. Electric control valve (ECV) - Removal     Precautions for using the plastic pulley • Take care not to give physical impact to the plastic pulley.If exposed to the impact of dropping and collision, the pulley should not be used although not damaged.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Troubleshooting

- Troubleshooting Trouble symptomSuspect areaRemedy  Clutch slipping • Car will not respond to engine speed during acceleration • Insufficient vehicle speed • Lack of power during uphill driving  Insufficient pedal free playAdjust Clogged hydraulic systemCorrect or replace parts Excessive wear of clutch disc facingReplace Hardened clutch disc facing, or oil on surfaceReplace Damaged pressure plate or flywheelReplace Weak or broken pressure springReplace Diff

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