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: Alternator

- Specification ItemSpecification Rated voltage13.5V, 130A Speed in use 1,000 - 18,000 rpm Voltage regulatorIC Regulator built-in type Regulator Setting VoltageExternal mode 10.6 - 16 ± 0.3V Internal mode14.5 ± 0.3V Temperature GradientExternal mode0 ± 2 mV / °C  Internal mode-3.5 ± 2 mV / °C - Description The Alternator has eight built-in diodes, each rectifying AC current to DC current.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Description and Operation

- OBD-II Review 1. Overview The California Air Resources Board (CARB) began regulation of On Board Diagnostics (OBD) for vehicles sold in California beginning with the 1988 model year. The first phase, OBD-I, required monitoring of the fuel metering system, Exhaust Gas Recirculation (EGR) system and additional emission related components.

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