Hyundai Tucson: Mass Air Flow Sensor (MAFS)
Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Control - Fuel System / Mass Air Flow Sensor (MAFS)
Description
MAFS uses a hot-film type sensing element to measure the mass of intake air entering the engine, and send the signal to ECM.
A large amount of intake air represents acceleration or high load conditions while a small amount of intake air represents deceleration or idle.
The ECM uses this information to control the EGR solenoid valve and correct the fuel amount.
Specifications
Circuit Diagram
Harness Connector
Inspection
- Check the MAFS visually.
- Mounting direction correct.
- Any contamination, corrosion or damage on connector.
- Air cleaner's clogging or wet.
- MAFS cylinder's deforming or blocking by any foreign material.
- Check any leakage on intake system and intercooler system.
Removal
- Turn the ignition switch OFF and disconnect the battery (-) cable.
- Disconnect the mass air flow sensor connector (A) and the installation clamp (B).
- Remove the mass air flow sensor (C) after loosening mounting bolt.
Tightening Torque : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)
Installation
- Install the component with the specified torques.
- Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
- Be careful not to damage or deformation the sensing element and front grid.
- Insert the sensor in the installation hole and be careful not to damage when installation.
- Install in the reverse order of removal.
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Boost Pressure Sensor (BPS)
Description
Boost pressure sensor (BPS) is installed on top of intercooler output pipe to
measures the pressure of
supercharged air in the turbocharger.
Specification
Circuit Diagram
Harness Connector
Inspection
Connect th
ETC (Electronic Throttle control) System
Description
The Electronic Throttle Control (ETC) System consists of a throttle body with
an integrated control motor and throttle
position sensor (TPS). Instead of the traditional throttle cable, an Accelerator
Position Sensor (APS) is used to
Manifold Absolute Pressure Sensor (MAPS)
Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and
is installed on the
surge tank. It senses absolute pressure of the surge tank and transfers the
analog signal proportional to
the pressure to the ECM. By u
SEE MORE:
Engine Oil - Removal and Installation
Disconnect the battery negative terminal.
Remove the engine room under cover.
(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")
Drain the coolant.
(Refer to Cooling System - "Coolant")
D
Active Air Flap(AAF)
Remove the front bumper.
(Refer to Body (Interior and Exterior) - "Front Bumper Cover")
Disconnect the active air flap connector (A).
RH
LH
Remove the active air flap (A) after loosening the mounting screws.
RH
Information
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- Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual
