L3 Turbo Engine
Air Bypass Valve Function
M6-MPS_01028
1 Charge air cooler 2 Air bypass valve
• Too high overpressure in the air charging system can cause the air hose to come off or
damage the air charging system.
• To prevent this, if the air pressure in the air charging system exceeds a specified value
(approx.1.4 bar), the bypass valve opens and the pressure is released upstream of the
turbocharger.
• When the throttle is closed, vacuum applied to the air bypass valve diaphragm opens the
valve directly and the pressure is released upstream of the turbocharger.
01-28 Service Training Mazda6 MPS Supplement
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