Hyundai Santa Fe: Controller / Heater & A/C Control Unit (Manual). Components and components location

Component

Connector Pin Function

Pin No	Connector A	Connector B
1	Battery	Low
2	ISG B+	Common
3	ILL+ (TAIL)	Ground
4	Sensor REF (+5V)	Middle Low
5	Mode Actuator Feedback	Middle High
6	Temperature Actuator Feedback	High
7	Intake Actuator Feedback	-
8	Evaporator Temperature Sensor (+)
9	Ambient Temperature Sensor (+)
10	Mode Actuator (Vent)
11	Mode Actuator (Defrost)
12	Temperature Control Actuator (Cool)
13	Temperature Control Actuator (Warm)
14	Intake Actuator (Fresh Air)
15	Intake Actuator (Recirculated Air)
16	HTD (Rear Defrost)
17	Rear Defogging Swich
18	Rear C-LINE
19	Blower Common Signal
20	ILL - (RHEO)
21	IGN2
22	IGN1
23	-
24	Rear Blower Motor (+)
25	Rear Mosfet (GATE)
26	Rear Mosfet (DRAIN F/B)
27	Max Blower on Signal
28	PTC Relay 2 (DIESEL) PTC Relay 1 (GASOLINE)
29	-
30	PTC ON Signal (DIESEL) - (GASOLINE)
31	-
32	-
33	P-CAN_(HIGH)
34	P-CAN_(LOW)
35	-
36	ECV (+)
37	ECV (-)
38	Sensor Ground
39	Ground
40	Ground

Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the console upper cover (A)...

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