Hyundai Accent (HC): Controller / Heater & A/C Control Unit (Manual)

- Components

ConnectorPin NOFunctionConnectorPin NOFunction
B1Battery (+)B17IGN2
2-18ILL+ (TAIL)
3IGN119-
4-20Sensor ground REF (+5V)
5Intake actuator (Fresh)21HTD (Rear defog indicator)
6Intake actuator (Recirculation)22Hazard signal
7Intake actuator (Feedback)23Rear defog swich
8Evaporator Temperature Sensor (+)24-
9Ambient Temperature Sensor (+)25-
10Blower on signal common26-
11Max blower on signal27
12-28ECV+
13C_CAN High29ECV- (Ground)
14C_CAN Low30ILL- (RHEO)
15-31Sensor ground
16Ground32Ground

- Replacement

1.Disconnect the negative (-) battery terminal.

2.Remove the crash pad lower panel.(Refer to Body - "Crash Pad Lower Panel")

3.Remove the audio unit.(Refer to Body Electrical System - "Audio Unit")

4.Remove the glove box.(Refer to Crash Pad - "Glove Box Upper Cover Housing")

5.Remove the driver's side shower duct (A) after loosening the screw.

6.Disconnect the mode control cable (A).

7.Remove the passenger's side shower duct (A) after loosening the screw.

8.Disconnect the temperature control cable (A).

9.After loosening the mounting screws, remove the A/C & heater controller unit (A).

10.Disconnect the A/C & heater controller connectors (A).

11.To install, reverse the removal procedure.

Other information:

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

Standard Flow of Diagnostic Troubleshooting Notes With Regard To Diagnosis The phenomena listed in the following table are not abnormal.ConditionExplanation System check soundWhen starting the engine, a thudding sound can sometimes be heard coming from inside the engine compartment. This is because the system operation check is being performed.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Stop Lamp Switch

- Components 1. Brake pedal member assembly2. Stop lamp switch3. Brake pedal arm 4. Pedal pad - Schematic Diagram - System circuit diagram - Terminal function TerminalDescription 1IGN 2BS 3- 4B+ 5BLS 6GND - Adjustment 1.Turn ignition switch OFF and disconnect the negative (-) battery cable. 2.Remove the lower crash pad.

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