Hyundai Elantra: Keyless Entry And Burglar Alarm / Repair procedures

Inspection
   
Wrap the protective tape on the tool to disassemble with the screwdriver or remover.
Use caution in keeping and handling during disassembling/assembling because it is easily contaminated with lubricant and oil.
Front Door Lock Module Inspection
1.
Remove the front door trim.
(Refer to Body - "Front Door Trim")
2.
Remove the front door module.
(Refer to Body - "Front Door Module")
3.
Disconnect the connector from the actuator.

No
Pin Information
LH
RH
1
-
-
2
Lock / Unlock switch
Motor 2
3
COM
Motor 3
4
Key Lock switch
Key Unlock switch
5
Key Unlock switch
Key Lock switch
6
Motor 3
COM
7
Motor 2
Lock / Unlock switch
8
-
-

4.
Check actuator operation by connecting power and ground according to the table. To prevent damage to the actuator, apply battery voltage only momentarily.

Rear Door Lock Module Inspection
1.
Remove the rear door trim.
(Refer to Body - "Rear Door Trim")
2.
Remove the rear door module.
(Refer to Body - "Rear Door Module")
3.
Disconnect the connectors from the actuator.

No
Pin information
LH
RH
1
-
-
2
Lock / Unlock switch
Motor 2
3
COM
Motor 3
4
-
-
5
-
-
6
Motor 3
COM
7
Motor 2
Lock / Unlock switch
8
-
-

4.
Check actuator operation by connecting power and ground according to the table. To prevent damage to the actuator, apply battery voltage only momentarily.

Tailgate Lock Module Inspection
1.
Remove the trunk lid trim.
(Refer to Body - "Trunk Lid Trim")
2.
Disconnect the connector from the actuator

3.
Check actuator operation by connecting power and ground according to the table. To prevent damage to the actuator, apply battery voltage only momentarily.

4.
Checking the trunk of the vehicle power option power refers to the trunk module.
Hood Switch
1.
Disconnect the connector (A).

2.
Check for continuity between the terminals and ground according to the table
(Refer to Body - "Hood Latch")

Burglar Horn Inspection
1.
Remove the burglar horn (A) after loosening the mounting bolts and disconnecting the connector (B).

2.
Test the burglar horn by connecting battery power to the terminal 2 and ground the terminal 1.

Description and Operation
Description Burglar Alarm State [B/A State] B/A StateDescriptionDISARM 1. In "DISARM" state, no vehicle start inhibition. So, when door, hood, or Tailgate is opened, there is no alarm sound ...

BCM (Body Control Module)
...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Lift And Support Points
General Information     • When heavy rear components such as suspension, fuel tank, spare tire, tailgate and trunk lid are to be removed, place additional weight in the luggage area before hoisting. When substantial weight is removed from the rear of the vehicle, the ...

Hyundai Elantra AD (2016-2020) Service Manual: Master Cylinder Repair procedures
Removal 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the battery. (Refer to Engine Electrical System - "Battery") 3. Remove the ECM (A). 4. Loosen the mounting bolts (A) and then remova the ECM bracket (B). 5. Disconnect the brake fluid l ...

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