Hyundai Sonata LF: Immobilizer System / Antenna Coil Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Body Electrical System / Immobilizer System / 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 antenna and then remove the coil antenna (A) after loosening the screw.

Installation

1.	Install the coil antenna and connect the 6P connector.

2.	Install the crash pad lower panel.

3.	Connect the negative (-) battery terminal.

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...

Ignition Switch Assembly. Repair procedures

Repair procedures Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad") 3...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Heated Oxygen Sensor (HO2S) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the HO2S connector. 3. Measure resistance between the HO2S terminals 2 and 5 [B1/S1]. 4. Measure resistance between the HO2S terminals 3 and 4 [B1/S2]. 5. Check that the resistance is within the specification...

Hyundai Sonata LF 2014-2019 Service Manual: Ambient Temperature Sensor Description and Operation