Car engine management system Hyundai Matrix

Checking the engine management system with distributed injection
Malfunction of elements of a control system of the engine with the distributed injection (sensors, ECU, injectors, etc.) causes fuel cutoff and insufficient fuel supply...

Malfunction indicator lamp (with European OBD)
The malfunction indicator lamp illuminates to alert the driver that there is a malfunction in the vehicle. However, if the detected malfunction does not occur after 3...

Malfunction indicator lamp (without European OBD)
The malfunction indicator lamp illuminates to alert the driver that there is a malfunction in the vehicle. However, if the detected malfunction does not occur after 3...

Correlation Between Fault Codes and Driving Performance
Pic. 2.237. Scheme of the relationship between fault codes and the characteristics of the process of driving a car 1. If the same malfunction is detected and persists...

Absolute pressure sensor
The absolute pressure sensor is a load cell that measures the pressure in the receiver. Inside the sensor is a metal diaphragm connected to a small wire. A change in...

Absolute pressure sensor malfunction indicator lamp
Malfunction indicator lamp (control lamp of malfunction of a control system of the engine) lights up or diagnostic trouble codes are displayed on the HI-SCAN tool in the...

Intake air temperature sensor
The intake air temperature sensor is integrated into the intake manifold absolute pressure sensor. The sensor is made in the form of a variable resistor, the resistance...

Control lamp of malfunction of the gauge of temperature of the taken-in air
Malfunction indicator lamp (control lamp of malfunction of a control system of the engine) lights up or diagnostic trouble codes are displayed on the HI-SCAN tool in the...

Coolant temperature sensor
The coolant temperature sensor is installed in the coolant line on the cylinder head. The sensor is made in the form of a thermistor, the resistance of which varies...

Throttle position sensor
Pic. 2.244. Throttle position sensor The throttle position sensor is shown in fig. 2.244. The throttle position sensor is mounted on the side of the throttle body, the...

Oxygen concentration sensor (heated)
The engine control unit uses the signals from the oxygen sensor to adjust the air/fuel mixture for optimum fuel economy and reduced emissions. Based on information about...

Causes of injector failure
1. Insufficient fuel pressure and fuel leaks at the injectors may be a possible cause of a hot engine starting problem. 2. If the injectors do not work when the engine...

Checking the performance of injectors by ear
Pic. 2.251. Checking injectors with a stethoscope Use a stethoscope to listen to the clicks of the injectors at idle (pic. 2.251). Verify that the click rate increases...

Checking the resistance at the injector terminals
Pic. 2.253. Checking the resistance at the injector terminals Disconnect the injector electrical connector and check the resistance at its terminals (pic. 2.253). Rated...

Ignition coil
When the ignition key is turned to the ON position («Ignition») or START («Starter») voltage is applied to the ignition coil. The ignition coil consists of two coils....

Knock sensor
The knock sensor is mounted on the cylinder block. The sensor perceives the vibrations of the walls of the cylinder block that occur during detonation. The piezoelectric...

Crankshaft position sensor
The crankshaft position sensor is an electromagnetic coil with a magnetic core and is installed next to the flywheel. The signal of the sensor is generated by passing in...

Camshaft position sensor
Camshaft position sensor (DPRV) serves to determine the TDC of the compression stroke of the 1st cylinder. Based on information from the camshaft position sensor, the...

Catalytic converter
The efficiency of a catalytic converter is manifested in its ability to oxidize carbon monoxide and hydrocarbons (CH). The engine control unit compares the front and...

Canister purge solenoid valve
The canister purge solenoid valve is part of the fuel vapor recovery system. The valve supplies purge air to the fuel vapor canister. Pic. 2.262. Canister purge solenoid...

Idle speed controller
The idle speed controller has two windings controlled by two separate stages of the engine control unit. Depending on the duty cycle of the sequence of control pulses,...

Mixture control system
The system for regulating the composition of the working mixture, in addition to a certain number of sensors, includes the following elements and systems: intake tract...

Vehicle speed sensor
The acceleration sensor is used to detect road irregularities. The sensor signal is used by the engine control unit to prevent erroneous detection of misfiring. The...

Electronic engine control unit
Pic. 2.267. Electronic control unit The electronic control unit is shown in fig. 2.267. Pic. 2.268. ECU connection diagram with «weight»

Air conditioner switch and relay
Pic. 2.269. Wiring diagram for air conditioning relay and computer When you turn on the air conditioner on the engine control unit from the air conditioner switch (pic....

Nozzles — general description
Nozzles - electromagnetic type. When voltage is applied (control pulse) on the injector winding, the needle valve of the injector opens and the fuel is sprayed under...

Checking the health of the oxygen sensor
If the oxygen sensor malfunctions, the toxicity of exhaust gases can increase dramatically. If the oxygen sensor is OK, but its signal voltage is not correct, check for...