Hyundai Sonata: Immobilizer System / Immobilizer Control Unit Repair procedures

Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the driver crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the knee airbag module.
(Refer to Restraint - "Knee Airbag (KAB) Module")
4.
Disconnect the connector of the immobilizer unit and then remove the immobilizer unit (A) after loosening a nut.

Installation
1.
Install the immobilizer control unit after connecting the unit connector.
2.
Install the crash pad lower panel and knee airbag module.
3.
Connect the negative (-) battery terminal.
Repair procedures
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Antenna Coil Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel") 3. Disconnect the 6P connector (B) of the coil ante ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Ambient Temperature Sensor (ATS) Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the ATS connector. 3. Measure resistance between the ATS terminals 1 and 2 [B1/S1]. 4. Check that the resistance is within the specification. Specification: Refer to "Specification" Removal 1. Turn the ig ...

Hyundai Sonata LF 2014-2019 Service Manual: Water pump Components and Components Location
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