Hyundai Sonata: 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
AJAR Switch
Motor 2
2
COM
Motor 1
3
Lock / UnLock switch
-
4
Key Lock switch
Key Unlock switch
5
Key Unlock switch
Key Lock switch
6
-
Lock / UnLock switch
7
Motor 1
COM
8
Motor 2
AJAR switch

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
AJAR Switch
Motor 2
2
COM
Motor 1
3
Lock / UnLock switch
-
4
-
-
5
-
-
6
-
Lock / UnLock switch
7
Motor 1
COM
8
Motor 2
AJAR Switch

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.
Trunk Open Switch
1.
Disconnect the negative (-) battery terminals.
2.
Remove the trunk lid trim
(Refer to Body - "Trunk Lid Trim")
3.
Disconnect the trunk open switch assembly connector (A).

4.
Check for continuity between terminals in half latching condition according to the table.

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")

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 Sonata LF 2014-2019 Service Manual: CVVT (Continuously Variable Valve Timing) System Description and Operation
Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load. By controlling CVVT, the valve over-lap or under-lap occurs, which m ...

Hyundai Sonata LF 2014-2019 Service Manual: Injector Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the injector connector. 3. Measure resistance between the injector terminals 1 and 2. 4. Check that the resistance is within the specification. Specification: Refer to “Specification” Removal     ...

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