Fuel Shut-Off Valve Function; Fuel Shut-Off Valve Construction/Operation; Charcoal Canister Function; Charcoal Canister Construction/Operation - Mazda 2006 MX-5 Service Highlights

FUEL SHUT-OFF VALVE FUNCTION [LF]
• The fuel shut-off valve prevents fuel from flowing to the charcoal canister during tight turns or vehicle rollover.
• The fuel shut-off valve releases evaporative gas to the charcoal canister.
• During refueling, the fuel shut-off valve closes to prevent a fuel overflow.
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FUEL SHUT-OFF VALVE CONSTRUCTION/OPERATION [LF]
• The fuel shut-off valve is built into the fuel tank.
• The fuel shut-off valve mainly consists of a valve, float, spring, and by-pass valve.
• During refueling or due to fuel sloshing, the float
is flooded with fuel and the floating force causes
the valve to close. Also, during vehicle rollover,
the valve closes due to balance between the float
gravity and spring.
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CHARCOAL CANISTER FUNCTION [LF]
• The charcoal canister contains activated charcoal that temporarily absorbs evaporative gas.
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CHARCOAL CANISTER CONSTRUCTION/OPERATION [LF]
• Installed on the rear of the fuel tank.
• During purge solenoid valve operation,
atmosphere enters the charcoal canister from the
atmospheric orifice to entirely flood the activated
charcoal and release the evaporative gas.
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EMISSION SYSTEM
E5U011642990N01
E5U011642990N02
VALVE
FLOAT
SPRING
E5U116ZS5006
E5U011613970N01
E5U011613970N02
TO PURGE
SOLENOID VALVE
TO FUEL
TANK
TO EVAP SYSTEM LEAK
DETECTION PUMP
EPU116ZT4502
01–16–13
01–16