Hyundai Tucson (NX4) 2022-2025 Service Manual / Body Electrical System / Smart Key System / Smart Key Unit

Hyundai Tucson: Smart Key System / Smart Key Unit

- Components (1) Integrated Body Control Unit (IBU)

Connector Pin Information

No	Connector A	Connector B	Connector C	Connector D
1	Speed_input	-	ECU ground	Blower motor operate_output
2	-	Rear washer switch_output	power ground	-
3	Front washer switch_input	ESCL (+)_output	Battery (+) ECU	-
4	PDW-R power_input	ESCL (-)_output	Battery (+) power	-
5	RPM_input	Front wiper low relay_output	-	-
6	-	-	Immobilizer antenna power_output	Start feedback_output
7	ACC relay_output	PDW switch IND_output	Immobilizer antenna ground_output	-
8	Multifunction switch ground_output	-	IGN 1_output	-
9	ESCL COM	-	-	Passenger outside handle _output
10	Front wiper switch_output	-	-	-
11	IGN1 relay_output	-	B_CAN (Low)	-
12	Head lamp (High) switch_output	-	B_CAN (High)	-
13	IGN2 relay_output	Auto light sensor signal_output	Start relay_output	Front bumper antenna(+)_output
14	Mirror unfolding_output	-	P_CAN (Low)	Bumper antenna power_output
15	wiper relay power_output	-	P_CAN (High)	Passenger outside handle antenna(+)_output
16	Rear right seat belt IND_output	SSB switch 2_input	Sunroof status_output	Driver outside handle antenna(+)_output
17	Rear left seat belt IND_output	PDW OPT_output	PDW-R switch_output	Liftgate antenna(+)_output
18	-	Front wiper back up switch_input	IFU door unlock signal_output	Interior antenna2 power_output
19	Rear wiper relay	Front wiper high relay_output	LIN3	Interior antenna1 power_output
20	-	SSB symbol illumination (+)_output	LIN4	ESCL Enable_output
21	PDW power_output	-	-	-
22	-	-	ATM solenoid_output	-
23	-	Auto light sensor ground_output	ACC_output	-
24	Brake switch_output	-	-	-
25	Rear wiper relay_output	-	-	Driver outside handle switch_output
26	UIPROA OPT_output	-	-	-
27	Front wiper volume switch_output	-	-	-
28	-	-	-	-
29	Light switch_output	-	kline IMMO	-
30	Puddle lamp_output	SSB switch1_output	RVM switch_output	Front bumper antenna(-)_output
31	Fog lamp switch_output	ESCL unlock switch_IN	P-Position_output (AT)	Bumper antenna ground_output
32	Mirror folding_output	Wiper parking switch_output	Clutch ignition lock switch_output (MT)	Passenger outside handle antenna(-)_output
33	-		IGN2_output	Driver outside handle antenna (-)_output
34	Rear center seat belt IND_output		LIN1	Liftgate antenna (-)_output
35	-		LIN2	Interior antenna2 ground_output
36	-		Auto light sensor power_output	Interior antenna1 ground_output
37	External amplifier_output
38	PDW-R power_output

- Circuit Diagram

- Removal Integrated Body Control Unit (IBU)

1.Disconnect the negative (-) battery terminal.

2.Remove the heater control unit.(Refer to Heating, Ventilation And Air Conditioning - "Heater Control Unit")

3.Remove the IBU (A) after loosening mounting bolt, nut and screw.

4.Disconnect IBU connectors and then remove the IBU (A).

- Inspection Smart Key Unit (Refer to Smart Key System - "Smart Key Diagnostic")Smart Key Switch (Refer to Smart Key System - "Smart Key Diagnostic")Smart Key Antenna Refer to Smart Key System - "Smart Key Diagnostic") - Installation Integrated Body Control Unit (IBU)

1.Install the IBU and connect the connector.

2.Install the heater control unit.

3.Install the negative (-) battery terminal and check the smart key system.

Smart Key

- Smart Key Smart Key Code Saving 1.Connect the DLC cable of diagnostic tool to the data link connector (16 pins) in driver side crash pad lower panel, turn the power on diagnostic tool. 2. ...

Smart key antenna

- Removal Interior 1 Antenna • Take care not to scratch the crash pad and related parts. 1.Disconnect the negative (-) battery terminal. 2.Remove the crash pad center pan ...

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