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.