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Components and Components Location: Components

WARNING: This page is about a different car, the 2016 Hyundai Elantra GT and 2015 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Heater & AC Control Unit (DATC)
G10751962Courtesy of HYUNDAI MOTOR AMERICA
CONNECTOR PIN FUNCTION (1 Of 2)

Connector Pin No Function Connector Pin No Function
A 1 Tail Lamp (+) A 21 Detent Out (+)
2 Sensor REF (+5V) 22 PAB IGN 1
3 C-CAN (High) 23 Seat heater Switch (Left)
4 C-CAN (Low) 24 Seat heater Switch (Right)
5 Mode Actuator (Vent) 25 Seat Heater Indicator - Low (Left)
6 Mode Actuator (Defog) 26 Seat Heater Indicator - Low (Right)
7 Mode Actuator Feedback 27 Ambient Temperature Sensor (+)
8 Intake Actuator (Fresh) 28 Evaporator Temperature Sensor (+)
9 Intake Actuator (Recirculation) 29 Humidity (PWM)
10 Intake Actuator Feedback 30 Photo Sensor (-) - Left
11 K-Line 31 PAB OFF Signal
12 HTD (Rear Defrost Indicator) 32 Photo Sensor (-) - Right
13 Rear Defrost Switch 33 ECV +
14 Temperature Actuator (Cool) - Driver 34 ECV - (Ground)
15 Temperature Actuator (Warm) - Driver 35 FET (Gate)
16 Temperature Actuator Feedback - Driver 36 Seat Heater Indicator - High (Left)
17 - 37 -
18 - 38 PTC Relay
19 - 39 -
20 Rheostat (ILL-) 40 Seat Heater Indicator - High (Right)
CONNECTOR PIN FUNCTION (2 Of 2)

Connector Pin No Function Connector Pin No Function
B 1 Ground B 17 Ground
2 Sensor Ground 18 Hazard Signal
3 FET (Drain Feedback) 19 Temperature Actuator (Cool) - Passenger
4 Ionizer Diagnosis 20 Temperature Actuator (Warm) - Passenger
5 Clean Signal 21 Temperature Actuator Feedback
6 Ion Signal 22 -
7 - 23 -
8 - 24 Blower Motor (+)
9 - 25 -
10 - 26 -
11 PAB ON Signal 27 -
12 Active ECO Signal 28 -
13 - 29 -
14 - 30 -
15 - 31 Battery
16 IGN 2 32 IGN 1