Mazda 626

1991-1998 of release

Repair and car operation

Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Heating and ventilation
- 5. Fuel system
   + 5.1. Nikki 30/34 carburetor
   + 5.2. Power supply system (l engines 1,6 and 1,8)
   - 5.3. Power supply system (l engines 2,0 and 2,5)
      5.3.1. Introduction
      5.3.2. Technical characteristics
      5.3.3. Pressure dumping in fuel system
      5.3.4. Fuel pump and fuel pressure
      5.3.5. Fuel tubes and connections of tubes
      5.3.6. Sensor of a measuring instrument of level of fuel
      5.3.7. Fuel tank
      5.3.8. Casing of the air filter
      5.3.9. Accelerator rope
      5.3.10. Electronic system of injection of fuel
      5.3.11. Butterfly valve casing
      5.3.12. Regulator of pressure of fuel
      5.3.13. Fuel highway and injectors
+ 6. Exhaust system
+ 7. Transmissions
+ 8. Coupling and semi-axes
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electroschemes
+ 14. Good advice

5.3.10. Electronic system of injection of fuel


The pulse multipoint system of injection of fuel includes three subsystems: system of a fence of air (air filter, airintaking branch pipes, sensor of a stream of air, throttle, monitoring system of idling and inlet collector), system of electronic control and system of supply of fuel (fuel pump, regulator of pressure of fuel, fuel injectors and fuel highway, relay of fuel system).


Check of system of electronic injection of fuel includes check of functioning of all its subsystems and elements of subsystems.

1. To check injectors, get the engine and put to each of them a special stethoscope. If you hear clicks, means, the injector functions normally.
2. If the injector does not click, connect to contacts of a wire of an injector a special lamp. If the lamp blinks, means, on contacts of an injector the correct tension moves.
3. Muffle the engine, disconnect wires from the general sockets of injectors and measure resistance of each injector of the right head of the cylinder, having connected one of ohmmeter wires to contact And, and another in turn to each of other three contacts.
4. Similarly measure resistance of each injector of the left head, having connected one изи ohmmeter wires to contact of D, and another in turn to each of other three contacts (1 – the left head, 2 – right). Compare the received results to technical requirements.
5. If necessary remove injectors and measure resistance of injectors, having connected an ohmmeter to its contacts.
6. Measure resistance of wires of injectors.