KIA Niro: Mass Air Flow Sensor (MAFS)
Description
MAFS uses a sensing element made of a hot-film to measure the mass of intake
air entering the engine
and to send the signal to the 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.
Circuit Diagram
Harness Connector
Mass Air Flow Sensor (MAFS) Repair procedures
Inspection
- Visually check the MAFS for the following:
- Correct mounting direction
- Any contamination, corrosion or damage on connector
- Clogged or wet air cleaner
- Deformation or blocked MAFS cylinder by foreign material
- Check for any leakage on intake system and intercooler system.
Removal
- Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
- Disconnect the mass air flow sensor connector (A) and the installation clamp (B).
- Remove the mass air flow sensor (C).
Mass air flow sensor mounting bolt : 3.9 - 5.8 N*m (0.4 - 0.6 kgf*m, 2.8 - 4.3 lb*ft) Mass air flow sensor clamp mounting screw : 2.9 - 4.9 N*m (0.3 - 0.5 kgf*m, 2.2 - 3.6 lb*ft)
Installation
Warning
- Install the component to the specified torque.
- Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
Warning
Be careful not to damage the sensing element and the honey cell.
- Install in the reverse order of removal.
READ NEXT:
Intake Air Temperature Sensor (IATS)
Specification
Description
Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature
Sensor (IATS) detects
the intake air temperature.
To precisely calculate the amount of air, correction of the air temperature is
requ
Engine Coolant Temperature Sensor (ECTS)
Specification
Description
Located in the engine coolant passage of the cylinder head, Engine Coolant
Temperature Sensor
(ECTS) detects the engine coolant temperature. The ECTS uses a thermistor with
resistance in
proportion to the tempera
Crankshaft Position Sensor (CKPS)
Specification
Crankshaft Position Sensor (CKPS) Description and operation
Description
Crankshaft Position Sensor (CKPS) is one of the most important sensors of the
engine control system
that detects the crankshaft position. Lack of CKPS sig
SEE MORE:
SRS Control Module (SRSCM) Repair procedures
SRS Control Module (SRSCM) Description and operation
The primary purpose of the SRSCM (Supplemental Restraints System Control
Module) is to determine
between an event that warrants restraint system deployment and an event that
does not. The SRS
Tire Repair procedures
Warning
Using tires and wheel other than the recommended sizes could cause
unusual handling characteristics
and poor vehicle control, resulting in a serious accident.
Measure the tread depth of the tires.
Tread depth (limit) : 1.6 mm (0.06
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