Hyundai Accent (HC): Heater / Temperature Control Actuator
1. Temperature control actuator
| Door Position | Voltage (V) | Error Detecting |
| Max. cooling | 0.3 ± 0.15 | Low voltage : 0.1V or less High voltage : 4.9V or more |
| Max. heating | 4.7 ± 0.15 |
1.Turn the ignition switch OFF.
2.Disconnect the temperature control actuator connector.
3.Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 6 and grounding terminal 5.Verify that the temperature control actuator operates to the warm position when connected in reverse.
| Pin NO | Function |
| 1 | - |
| 2 | - |
| 3 | Warm position |
| 4 | Sensor ground |
| 5 | Feedback signal |
| 6 | Sensor (+5V) |
| 7 | Cool position |
4.Connect the temperature control actuator connector.
5.Turn the ignition switch ON.
6.Check the voltage between terminal 5 and 6.
7.If the measured voltage is not within specification, check the operation by replacing the existing temperature control actuator with a new genuine part. After that, determine whether replacement of the temperature control actuator is required or not.
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 Temperature Control Actuator can be checked.
4.To perform compulsory operation on Temperature Control Actuator input factors, select "ACTUATION TEST".
1.Disconnect the negative (-) battery terminal.
2.Remove the glove box upper cover housing assembly.(Refer to Body - "Glove Box Upper Cover Housing Assembly")
3.Remove the passenger's side shower duct (A) after loosening the screw.
4.Disconnect the connector (A) and then remove the temperature control actuator (B) after loosening the mounting screws.
5.To install, reverse the removal procedure.
Other information:
Hyundai Accent (HC) (2017 - 2022) Service Manual: Heater & A/C Control Unit (FATC)
- Components ConnectorPin NOFunctionConnectorPin NOFunction A1Battery (+)A21IGN2 2ADS Sensor (PWM)22IGN1 3ILL+ (TAIL)23HTD (Rear defog indicator) 4C_CAN High24PAB off signal 5C_CAN Low25PAB IGN1 6Defrost actuator (Open)26Sensor ground REF (+5V) 7Defrost actuator (Close)27Detent out (-) 8Mode control actuator (Vent)28Ambient Temperature Sensor (+) 9Mode control actuator (Def)29Evaporator Temperature Sensor (+) 10Temperature control actuator (Cool)30Photo sensor (-) 11Temperature control actuator (Warm)31- 12Intake actuator (Fresh)32- 13Intake actuator (Recirculation)33Hazard signal 14Mode control actuator (Feedback)34Rear defog swich 15Tmperature control actuator (Feedback)35- 16Intake actuator (Feedback)36Blower motor (+) 17Defrost actuator (Feedback)37Fet (Drain feedback) 18ECV+38Fet (Gate) 19ECV- (Ground)39Sensor ground 20ILL- (RHEO)40Ground - Self Diagnosis 1.Hyundai Accent (HC) (2017 - 2022) Service Manual: Fuel Pressure Test
- Fuel Pressure Test 1.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line") • When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the GDS after completion of "Release Residual Pressure in Fuel Line" work. 2.Install the Special Service Tool (SST).
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