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 ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Troubleshooting
Troubleshooting • The battery must be in good condition and fully charged for this troubleshooting. ...

Hyundai Elantra AD (2016-2020) Owners Manual: Owner Maintenance. Owner Maintenance Schedule
WARNING Performing maintenance work on a vehicle can be dangerous. If you lack sufficient knowledge and experience or the proper tools and equipment to do the work, have it done by an authorized HYUNDAI dealer. ALWAYS follow these precautions for performing maintenance work: Park your vehi ...