Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: Immobilizer System / Immobilizer Control Unit

Hyundai Elantra (CN7) 2021-2025 Service Manual / Body Electrical System / Immobilizer System / Immobilizer Control Unit

Components and components location
Components (1)
With Smart Key

Connector Pin Information
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


-
-

Without Smart Key

Connector Pin Information
Pin no
Connector A
Connector B
Connector C
Connector D
1
-
-
-
-
2
Front heated nozzle_output
-
-
-
3
-
-
-
Mirror folding_output
4
Front washer switch _Input
-
-
PDW option_input
5
-
LIN(PDW)
-
-
6
Ground_Power
R-PDW power_input
-
-
7
Ground_ECU
R-PDW power_output
-
-
8
-
F-PDW power_output
-
-
9
Battery (+) ECU
ATM solenoid_output
-
Auto light sensor ground_output
10
Battery (+) Power
Head lamp high beam switch_input
-
Rear view camera switch_input
11
IGN_Input
Front washer switch _Input
-
R-PDW switch_input
12
Kiline_IMMO
Front wiper INT volume switch_input
-
P-Position_input
13
-
Wiper parking switch_input
-
-
14
-
-
-
Multifunction Switch ground _Input
15
-
R-PDW switch IND_output
-
ACC_input
16
-
-
-
IGN2_input
17

-
-
Front wiper low back up switch_input
18

-
-
Brake switch_input
19

-
-
-
20

-
-
-
21

-
-
-
22

LIN 3(Rain sensor)
-
-
23

Wiper power relay_output

Mirror unfolding_output
24

-

-
25

Wiper low relay_output

B-CAN High
26

Wiper high relay_output

B-CAN Low
27

-

P-CAN High
28

Fog lamp switch_input

P-CAN Low
29

Light switch_input

Auto light sensor power_output
30

-

Auto light sensor signal_input
31

-

Sunroof status_input
32

-

Key solenoid_output
33

Key hall illumination_output

Start inhibit relay_output
34

EMS ECU wake up_output/Dood unlock signal_output

key in switch_input
35

-

-
36

-

-
37



Immobilizer antenna power_output
38


Immobilizer antenna ground_output
39


-
40


-

Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box housing cover.
(Refer to Body - "Glove Box Housing Cover")
3.
Loosen the mounting bolts, nuts and remove the immobilizer unit (A).

4.
Press the lock pin and disconnect the immobilizer unit connectors (A).

Installation
1.
Install the immobilizer control unit after connecting the unit connector.
2.
Install the glove box housing cover.
3.
Connect the negative (-) battery terminal.

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