Hyundai Elantra: Controller / Heater & A/C Control Unit (Manual) Components and Components Location

Hyundai Elantra AD (2016-2020) Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (Manual) Components and Components Location

Components

Connector	Pin NO	Function	Connector	Pin NO	Function
A	1	Low	B	18	ILL- (RHEO)
	2	Common		19	Sensor ground
	3	Ground		20	Ground
	4	Middle Low		21	Battery (+)
	5	Middle High		22	ISG DC
	6	High		23	ISG B+
B	1	IGN2		24	ILL+ (TAIL)
	2	PAB IGN1		25	Sensor REF (+5V)
	3	HTD (Rear defog indicator)		26	EVAP sensor (+)
	4	Detent Out (-)		27	AMB sensor (+)
	5	PTC Relay 2		28	Mode control actuator (Feedback)
	6	PTC Relay 3		29	Temperature control actuator (Feedback)
	7	PTC on signal		30	Intake actuator (Feedback)
	8	PAB Off signal		31	Mode control actuator (Vent)
	9	SBR		32	Mode control actuator (Def)
	10	Rear SBR [LH]		33	Temperature control actuator (Cool)
	11	Rear SBR [Center]		34	Temperature control actuator (Warm)
	12	Rear SBR [RH]		35	Intake actuator (Fresh)
	13	ECV+		36	Intake actuator (Recirculation)
	14	ECV- (Ground)		37	C_CAN High
	15	Max blower on signal		38	C_CAN Low
	16	Rear defogging swich (On)		39	Blower common signal
	17	Hazard signal		40	Ground

Controller

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Heater & A/C Control Unit (Manual) Repair procedures

Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the glove box upper cover assembly. (Refer to Body - "Glove Box Upper Cover Assembly") 3. Loosen the mounting screw ...

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