Hyundai Elantra (CN7): Exhaust Emission Control System / Catalytic Converter

Description and operation

Description
The catalytic converter of the gasoline engine is a three way catalyst. It oxidizes carbon monoxide and hydrocarbons (HC), and separates oxygen from the oxides of nitrogen (NOx).

Repair procedures

Removal
[Catalytic Converter (WCC)]
1.
Remove the exhaust manifold.
(Refer to Engine Mechanical System - "Exhaust Manifold")
[Catalytic Converter (UCC)]
1.
Remove the Center Muffler.
(Refer to Engine Mechanical System - "Center Muffler")
Installation
1.
Install in the reverse order of removal.

    DescriptionExhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components.Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control 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.

    Other information:

    Hyundai Elantra (CN7) 2021-2026 Service Manual: A/C Pressure Transducer

    Description and operation DescriptionThe A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Smart Cruise Control (SCC) Switch

    Schematic diagrams Circuit DiagramTRIP / SCC / LFA Repair procedures Inspection1.Check for resistance between terminals in each switch position (LH).[LH : Audio + Hands free] Switch Resistance (±5%) SEEK Up430 ΩSEEK Down1.

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