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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 (Manual) Components And Connector Terminals
G12043520Courtesy of HYUNDAI MOTOR AMERICA

Connector [A] 

Pin No. Function
1 Middle High
2 Middle Low
3 Ground
4 High
5 -
6 Low

Connector [B] 

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

Connector [C] 

Pin No. Function
1 Sensor REF (+5V)
2 Driver's seat heat switch
3 Driver's seat heat indicator (High)
4 Driver's seat heat indicator (Mid)
5 Driver's seat heat indicator (Low)
6 Driver's seat cool switch
7 Driver's seat cool indicator (High)
8 Driver's seat cool indicator (Mid)
9 Driver's seat cool indicator (Low)
10 Passenger's seat cool switch
11 Passenger's seat cool indicator (High)
12 Passenger's seat cool indicator (Mid)
13 Passenger's seat cool indicator (Low)
14 Passenger's seat heat switch
15 Passenger's seat heat indicator (High)
16 Passenger's seat heat indicator (Mid)
17 Passenger's seat heat indicator (Low)
18 -
19 -
20 -
21 -
22 -
23 Sensor ground
24 Ground