Car engine management Hyundai Accent 3

Engine management system
Sensors 1. Mass Air Flow Sensor (MAFS) 2. OX temperature sensor(ECTS) 3. Crankshaft Position Sensor (CKPS) 4. Camshaft Position Sensor (CKPS) 5. Front Oxygen Sensor...

Engine management system components
1. Engine control unit (MCU) or powertrain control unit (PCU) 2. Mass Airflow Sensor (MAPS) 3. Air temperature sensor (IATS) 4. Throttle Position Sensor (TPS) 5. Coolant...

Checking the input and output signals of the engine control unit (models with automatic transmission)
Connector C101-1 Connector C01-2

Checking the input and output signals of the engine control unit (models with manual transmission)
Connector C01

Peripherals of the engine management system
A significant part of faults in the engine management system occurs due to violation of the conditions of switching of the peripheral devices of the system and the...

Checking the electromagnetic valve of the camshaft phase adjuster (OCV)
Checking the valve Turn off the ignition and disconnect the valve connector. Measure the resistance of the valve winding with an ohmmeter. Nominal value: 6.9-7.9 Ohm (at...

Checking the crankshaft position sensor (CKPS) and camshaft position sensor (CMPS)
Checking the signal shape The figure shows the shapes of typical sensor signals at the engine crankshaft idle speed. Checking CMPS Wiring With the ignition on, measure...

Checking the oxygen sensor (HO2S)
Checking the signal shape To speed up the warm-up of the oxygen sensor, the ECM supplies power to the sensor heating elements, except during cold starts and sudden...

Checking the mass air flow (MAFS) and temperature (IATS) sensors
Checking the MAFS signal shape The ECM constantly compares the signals from the air flow sensor and the throttle position sensor. During acceleration, the sensor output...

Checking the coolant temperature sensor (ECTS)
Checking the sensor Remove the coolant temperature sensor and place the measuring part of the sensor in water. Slowly heating the water, measure the resistance of the...

Checking the Throttle Position Sensor (TPS)
Checking the sensor With the ignition off, disconnect the sensor connector and measure the resistance of the circuit between contacts 2 and 3. Nominal value: 1.6-2.4...

Checking the knock sensor (KS)
Checking the wiring With the ignition on, measure the voltage between the contacts of the wire part of the connector and the ground. Circuit under test Nominal voltage...

Checking the Idle Air Control Valve (ISCA)
Checking the signal shape With the engine idling, check the regulator signal: 1 - Closing control signal; 2 - Opening control signal. Checking the regulator Turn off the...

Possible malfunctions and their causes
Mechanical part Charging system Ignition system Launch system Toxicity reduction system Power supply system

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