Mazda 626

1991-1998 of release

Repair and operation of the car

Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Heating and ventilation
+ 5. Fuel system
- 6. Exhaust system
   + 6.1. Exhaust system
   - 6.2. Systems of decrease in toxicity of exhausts and management of operation of the engine
      6.2.1. Introduction
      6.2.2. System of self-diagnostics and codes of malfunction
      6.2.3. Central control unit
      6.2.4. Sensor of provision of a butterfly valve
      6.2.5. Air stream sensor
      6.2.6. The sensor of temperature of the arriving air
      6.2.7. Sensor of temperature of cooling liquid
      6.2.8. Sensor of provision of a bent shaft
      6.2.9. Sensor of position of the camshaft
      6.2.10. Switch of system of hydrostrengthening of steering
      6.2.11. Oxygen sensor
      6.2.12. Sensor of detonation combustion of fuel
      6.2.13. Speed sensor
      6.2.14. Air valve
      6.2.15. System of additional air supply on low turns
      6.2.16. System of ventilation of a case
      6.2.17. System of recirculation of exhaust gases
      6.2.18. System of collecting vapors of fuel
      6.2.19. Switch of fires of a stoplight
      6.2.20. Catalytic converter
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electrical circuitries
+ 14. Useful tips


6.2.18. System of collecting vapors of fuel


The system of collecting vapors of fuel consists of the coal filter, the blowing-off valve and connecting hoses.


1. Check a condition of hoses and connections.
2. Disconnect a vacuum hose from the coal filter and connect the vacuum manometer. When the engine is not heated-up and idles, depression has to be absent. If depression is present probably the blowing-off valve is faulty. Warm up the engine and check depression existence. If is not present, replace the blowing-off valve.
3. Check that the two-sided valve located near the coal filter did not pass air.
4. Check giving of tension for the blowing-off valve.
5. Check the coal filter for leak existence.


Coal filter
1. Disconnect hoses from the filter, turn off fixing bolts and remove the coal filter.
2. Installation is carried out upside-down removals.
Blowing-off valve
3. Disconnect vacuum hoses from the valve. Turn off a fixing bolt and remove the valve.
4. Installation is carried out upside-down removals.

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