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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 3 (2003 release)

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Mazda 3
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Mazda
3
Operation and maintenance of car
Engine
General description new engines models L8, LF, L3
The mechanical part of engines
Appendix 1
Annex 2
Appendix 3
Control system
The principle of operation and the appointment of some components of the control system
Camshaft position sensor (CMP)
Camshaft position sensor (CKP)
The regulator of idling (IAC)
Management duct with varying characteristics (VAD)
Start-up system with variable characteristics (VIS)
The control system of mixing the intake air (VTCS)
Control valve timing change mechanism
Fuel injection control
Office off the air conditioning system
Management of the electric fan
Controller Area Network (CAN)
System of onboard diagnostics
Fault codes
Engine Z6 - mechanical part
Lubrication system
Cooling system
Intake system
Fuel system
Exhaust and Emission
Ignition system
Control system
Tables
Transmission
Chassis
Steering Gear
Brakes
Onboard electric
Body
 


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The control system of mixing the intake air (VTCS)



VTCS system actuates the flap in the intake manifold to increase the flow rate of intake air and create turbulence in the combustion chamber to improve atomization of fuel injected into the cylinder. This reduces the number of CH and CO in the exhaust gases at low loads.
The PCM includes a solenoid valve VTCS, which closes the valve in the intake manifold, if the following conditions are met:
- Engine speed - below 3750 min -1;
- Throttle opening angle - below 1500 min -1 - throttle closed, between 2000 and 3000 min -1 min -1 - 26-29% above 2500 min-1 - throttle fully open;
- Coolant temperature below 63 ?� C.
The PCM turns off the solenoid valve VTCS to preserve the quality and stability of starting the engine is started and for 0.2 seconds after starting the engine.




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Start-up system with variable characteristics (VIS)
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Control valve timing change mechanism

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