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Components And Components Location: Components

WARNING: This page is about a different car, the 2017 Hyundai Tucson. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Heater & A/C Control Unit (DATC) Components And Connector Terminals
G12043525Courtesy of HYUNDAI MOTOR AMERICA

Connector [A] 

Pin No. Function
1 Battery (+)
2 ILL+ (TAIL)
3 IGN2
4 Mode control actuator (Vent)
5 Mode control actuator (Def)
6 Driver's temperature control actuator (Cool)
7 Driver's temperature control actuator (Warm)
8 Intake actuator (Fresh)
9 Intake actuator (Recirculation)
10 Mode control actuator (Feedback)
11 Driver's temperature control actuator (Feedback)
12 Intake actuator (Feedback)
13 Detent signal
14 C CAN High
15 C CAN Low
16 Blower motor (+)
17 FET Drain (Feedback)
18 FET (Gate)
19 -
20 ILL- (RHEO)
21 IGN1
22 ISG DC
23 Rear defog switch (Low)
24 HTD (Rear defog indicator)
25 Photo sensor (-) LH
26 Photo sensor (-) RH
27 In-car sensor
28 EVAP sensor
29 AMB Sensor
30 Ionizer diagnosis
31 Clean signal
32 -
33 PTC on signal (Low)
34 PTC Relay 2
35 PTC Relay 3
36 -
37 ECV- (Ground)
38 ECV+
39 -
40 Ground

Connector [B] 

Pin No. Function
1 Sensor REF (+5V)
2 Passenger's temperature control actuator (Feedback)
3 Passenger's temperature control actuator (Cool)
4 Passenger's temperature control actuator (Warm)
5 Driver's seat heat switch
6 Driver's seat heat indicator (High)
7 Driver's seat heat indicator (Mid)
8 Driver's seat heat indicator (Low)
9 Driver's seat cool switch
10 Driver's seat cool indicator (High)
11 Driver's seat cool indicator (Mid)
12 Driver's seat cool indicator (Low)
13 Passenger's seat cool switch
14 Passenger's seat cool indicator (High)
15 Passenger's seat cool indicator (Mid)
16 Passenger's seat cool indicator (Low)
17 Passenger's seat heat switch
18 Passenger's seat heat indicator (High)
19 Passenger's seat heat indicator (Mid)
20 Passenger's seat heat indicator (Low)
21 Defogging actuator (Feedback)
22 Defogging actuator (On)
23 Defogging actuator (Off)
24 Auto defogging temperature
25 Auto defogging SCK
26 Auto defogging data
27 Steering wheel heat switch
28 Steering wheel heat indicator
29 -
30 -
31 Sensor ground
32 Ground