Hyundai Elantra: Smart Key System / Smart Key Unit

Hyundai Elantra (CN7) 2021-2024 Service Manual / Body Electrical System / Smart Key System / Smart Key Unit

Components and components location

Components (1)

Connector Pin InformDation

Pin no	Connector A	Connector B	Connector C	Connector D	Connector E
1	ESCL (+)_output	-	-	-	-
2	Front heated nozzle_output	-	-	-	-
3	-	Puddle pocket lamp_output	-	Mirror folding_output	-
4	Front washer switch _Input	-	-	-
5	-	LIN(PDW)	-	-	ESCL enable_output
6	Ground_Power	R-PDW power_input	-	-	RPM_input
7	Ground_ECU	R-PDW power_output	-	-	Start relay_output
8	ESCL (-)_output	F-PDW power_output	-	-	ACC relay_output
9	Battery (+) ECU	ATM solenoid_output	-	Auto light sensor ground_output	Start feedback_input
10	Battery (+) Power	Head lamp high beam switch_input	-	Rear view camera switch_input	SSB switch2_input
11	IGN_Input	Front washer switch _Input	-	R-PDW switch_input	Trunk antenna (-)_output
12	Kiline_IMMO	Front wiper INT volume switch_input	-	P-Position_input	Interior2 antenna power(-)_output
13	-	Wiper parking switch_input	-	Passenger outside handle switch_input	-
14	-	External buzzer_output	-	Multifunction Switch ground _Input	Passenger outside handle antenna (-)_output
15	-	R-PDW switch IND_output	-	ACC_input	-
16	-	-	-	IGN2_input	-
17		-	-	Front wiper low back up switch_input	-
18		-	-	Brake switch_input	Driver outside handle antenna (-)_output
19		-	-	-	Immobilizer antenna ground_output
20		-	-	-	-
21		-	-	-	-
22		LIN 3(Rain sensor)	-	PDW option_input	-
23		Wiper power relay_output		Mirror unfolding_output	-
24		-		-	-
25		Wiper low relay_output		-	-
26		Wiper high relay_output		-	Wheel speed sensor_input
27		-		-	IGN2 relay_output
28		Fog lamp switch_input		-	IGN1 relay_output
29		Light switch_input		Auto light sensor power_output	SSB symbol illumination(+)_output
30		-		Auto light sensor signal_input	SSB switch1_input
31		-		Sunroof status_input	Trunk antenna (+)_output
32		-		ESCL unlock switch_input	Interior2 antenna power(+)_output
33		ESCL_COM		Clutch lock switch_input (MT)	-
34		EMS ECU wake up_output/Dood unlock signal_output		Driver outside handle switch_input	Passenger outside handle antenna (+)_output
35		-		B-CAN High	-
36		-		B-CAN Low	-
37				P-CAN High	-
38				P-CAN Low	Driver outside handle antenna (+)_output
39				-	Immobilizer antenna power_output
40				-	-

Schematic diagrams

Circuit Diagram

Repair procedures

Removal

Smart Key Unit (IBU)

1.	Disconnect the negative (-) battery terminal.

2.	Remove the glove box housing cover.. (Refer to Body - "Glove Box Housing Cover.")

3.	Remove the smart key unit(IBU) (A) after loosening bolt and nuts.

4.	Disconnect smart key unit (IBU) connectors.

Inspection

Smart Key Unit

(Refer to Smart Key System - "Smart Key Diagnostic")

Installation

Smart Key Unit

1.	Install the smart key unit.

2.	Install the smart key unit mounting bolts and connect the connector.

3.	Install the Glove box housing cover..

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

Smart Key

Repair procedures Smart KeySmart Key Code Saving1.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...

Smart Key Diagnostic

Repair procedures InspectionSelf Diagnosis With Scan ToolIt will be able to diagnose defects of SMART KEY system with Diagnostic tool quickly. Diagnostic tool can operates actuator forcefully, input/output value monitoring and self diagnosis...

Other information:

Hyundai Elantra (CN7) 2021-2024 Service Manual: Turn Signal Lamp

Repair procedures Removal1.Disconnect the negative (-) battery terminal.2.Remove the front bumper.(Refer to Body - "Front Bumper Cover")3.Remove the head lamp.4.Remove the bulb socket (A) and turn signal lamp bulb (B) from the lamp assembly.Replacement1...

Hyundai Elantra (CN7) 2021-2024 Owner's Manual: Seats

The actual layout of the vehicle may differ from the illustration. Driver’s seat (1) Forward and rearward (2) Seatback angle (3) Seat cushion height (4) Seat cushion angle (5) Lumbar support Front passenger’s seat (1) Forward and rearward (2) Seatback angle..

Side air bags

Front seat

Your vehicle is equipped with a side air bag in each front seat. The purpose of the air bag is to provide the vehicle’s driver and the front passenger with additional protection than that offered by the seat belt alone.