Hyundai Elantra (CN7): Engine Control / Fuel System

Hyundai Elantra (CN7) 2021-2026 Service Manual / Engine Control / Fuel System

Description and operation DescriptionContinuous 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.

Basic TroubleshootingBasic Troubleshooting GuideCustomer Problem Analysis SheetBasic Inspection ProcedureMeasuring Condition of Electronic Parts' ResistanceThe measured resistance at high temperature after vehicle running may be high or low.

Other information:

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.

Hyundai Elantra (CN7) 2021-2026 Service Manual: Troubleshooting

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

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