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2.7. Control system, fuel system and system of decrease in toxicity

Main malfunctions and their reasons
Check of technical condition (Check of frequency of rotation of the crankshaft of the engine idling)
Check of operability of the fuel pump
System of compulsory ventilation of a case
System of catching of vapors of fuel
Fuel supply system
Check of a control system of the engine with the distributed injection
 Control lamp of malfunction (cars with the European onboard system of diagnostics)
 Cars without the European onboard system of diagnostics
 Ratio between codes of malfunctions and the characteristic of process of driving of the car
 Sensor of absolute pressure
 Conditions of storing of codes of malfunctions
 Control lamp of malfunction
 The sensor of temperature of the soaked-up air
 Conditions of storing of codes of malfunctions
 Control lamp of malfunction
 Sensor of temperature of cooling liquid
 Conditions of storing of codes of malfunctions
 Sensor of provision of a butterfly valve
 Conditions of storing of codes of malfunctions
 The sensor of concentration of oxygen (with heating)
 Conditions of storing of codes of malfunction (P0130 code)
 Conditions of storing of codes of malfunction (P0136 code)
 Conditions of storing of codes of malfunction (P0131 code)
 Conditions of storing of codes of malfunction (P0131 code)
 Conditions of storing of codes of malfunction (P0132 code)
 Conditions of storing of codes of malfunction (P0138 code)
 Conditions of storing of codes of malfunction (P0133 code)
 Conditions of storing of codes of malfunction (P0134 code)
 Conditions of storing of codes of malfunction
 Causes of defect
 Working capacity check aurally
 Check of resistance on nozzle conclusions
 Ignition coil
 Conditions of storing of codes of malfunction
 Detonation sensor
 Conditions of storing of codes of malfunction
 Sensor of position of the crankshaft
 Conditions of storing of codes of malfunction (P0335)
 Conditions of storing of codes of malfunction (P0335)
 Sensor of position of the camshaft
 Conditions of storing of codes of malfunction
 Catalytic converter
 Conditions of storing of codes of malfunction
 Electromagnetic valve of a purge of an adsorber
 Conditions of storing of codes of malfunction
 Idling regulator
 Conditions of storing of codes of malfunction
 System of regulation of composition of working mix
 Conditions of storing of codes of malfunction (short-term regulation of composition of mix)
 Conditions of storing of codes of malfunction (long-term regulation of composition of mix)
 Sensor of speed of the movement of the car
 Conditions of storing of codes of malfunction (at P1307)
 Conditions of storing of codes of malfunction (at P1308, P1309)
 Electronic control unit engine
 Check of a chain of connection with "weight"
 Switch and relay of the conditioner
 Check by means of a tester
Removal, check and installation of fuel nozzles
System of decrease in toxicity of the fulfilled gases
Removal and installation of the main muffler
Check of tightness of system of production of the fulfilled gases
Cars with catalytic converter in system of production of the fulfilled gases
Service regulations of cars with catalytic converter in system of production of the fulfilled gases



On cars the electronic control system of the engine, that is system of the distributed fuel injection is applied. Is called distributed injection because for each cylinder fuel is injected by a separate nozzle. The system of injection of fuel allows to reduce toxicity of the fulfilled gases at improvement of riding qualities of the car.
There are systems of the distributed injection with feedback and without it. In the present section only the short description of the general principles of the device, work and repair is given
systems of injection of fuel.
Engines of Hyundai have a control system with feedback. At it in system of release catalytic converter and the sensor of concentration of oxygen which provides feedback is established. The sensor traces concentration of oxygen in the fulfilled gases, and the controller on its signals supports such ratio air/fuel which ensures the most effective functioning of converter.
In system of injection without feedback converter and the sensor of oxygen are not established, and for adjustment of concentration WITH serves in the fulfilled gases WITH - a potentiometer. In this system also the system of catching of vapors of gasoline is not applied.


Fig. 2.206. The scheme of a control system of the engine of 1,6 l with the OBD-II system




Fig. 2.207. The scheme of a control system of the engine of 1,8 l with the OBD-II system




Fig. 2.208. The scheme of a control system of the l engine 1,6 and 1,8 without the OBD-II system




Fig. 2.209. The scheme of a control system of the l engine 1,6 and 1,8 for ethylated gasoline