Hyundai Elantra (CN7): Body Electrical System / Immobilizer System

Components and components location Component Repair procedures Removal1.Disconnect the negative(-) battery terminal.2.Remove the AVN Head unit.

DescriptionThe immobilizer system will disable the vehicle unless the proper ignition key is used, in addition to the currently available anti-theft systems such as car alarms, the immobilizer system aims to drastically reduce the rate of auto theft.

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Hyundai Elantra (CN7) 2021-2026 Service Manual: Repair procedures

Diagnosis with Diagnostic tool1.In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).The diagnostic system (Diagnostic tool) provides the following information.(1)Fault Code Searching : Checking failure and code number (DTC)(2)Data Analysis : Checking the system input/output data s

Hyundai Elantra (CN7) 2021-2026 Service Manual: Compressor oil

Repair procedures Oil Specification1.The HFC-134a system requires synthetic (PAG) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed.2.Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of compressor.

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