Mazda 3 since 2003
	1. Operation and maintenance of the car
	2. Engine
		2.1. General description of new engines of the L8, LF and L3 models
		2.2. Mechanical part of engines
		2.3. Appendix 1
		2.4. Appendix 2
		2.5. Appendix 3
			2.5.1. Control system
			2.5.2. Principle of work and purpose of some components of a control system
			2.5.3. Codes of malfunctions
				2.5.3.1. Codes of malfunctions
				2.5.3.2. Synchronization of provision of a cam-shaft
				2.5.3.3. Heater of the sensor of concentration of oxygen
				2.5.3.4. Pressure sensor in an inlet collector
				2.5.3.5. Pressure sensor in an inlet collector
				2.5.3.6. The air temperature sensor on an admission (air temperature on an admission)
				2.5.3.7. Sensor of provision of a butterfly valve
				2.5.3.8. Fuel system
				2.5.3.9. Monitoring of the admission of ignition
				2.5.3.10. Detonation sensor
				2.5.3.11. The valve of recirculation of the fulfilled gases
				2.5.3.12. System of neutralization
				2.5.3.13. Electromagnetic valve of a purge
				2.5.3.14. Control system of cooling system fans
				2.5.3.15. Neutral switch
				2.5.3.16. The electromagnetic valve of system of an admission with variable characteristics (VAD)
				2.5.3.17. PCM block
				2.5.3.18. Control system of air hashing
				2.5.3.19. Sensor of barometric pressure
				2.5.3.20. Generator
		2.6. The Z6 engine – a mechanical part
		2.7. Lubrication system
		2.8. Cooling system
		2.9. System of an admission
		2.10. Fuel system
		2.11. System of production of the fulfilled gases and system of decrease in toxicity
		2.12. System of ignition
		2.13. Control system
		2.14. Tables
	3. Transmission
	4. Running gear
	5. Steering mechanism
	6. Brake system
	7. Onboard electric equipment
	8. Body

2-5-3-12-sistema-nejjtralizacii.html

2.5.3.12. System of neutralization

System effectiveness of neutralization is lower than the threshold level (P0420)

The PCM block compares the number of inversions of forward and back sensors of concentration of oxygen to heating during certain time. The PCM block controls the number of inversions of the back sensor at the set number of inversions of the forward sensor when the following conditions are satisfied. The PCM block finds a ratio of inversions:

– frequency of rotation of the engine – 1410–3000 ^min.-1 (models with the mechanical transmission);

– frequency of rotation of the engine – 1281–3000 ^min.-1 (models with the automatic transmission);

– settlement loading of 15-50% *.

If the ratio of inversions – below threshold level, the PCM block decides that work of system of neutralization worsened.

* The maximum calculated value of loading changes depending on the frequency of rotation of the engine

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2.5.3.11. The valve of recirculation of the fulfilled gases

following page"
2.5.3.13. Electromagnetic valve of a purge