Toyota 22R-E - Evaporative Emission (EVAP) Control System; Inspection of Fuel Vapor Lines, Fuel Tank and Tank Cap; Visually Inspect Lines and Connections; Visually Inspect Fuel Tank

INSPECTION OF FUEL VAPOR LINES,FUEL
TANK AND TANK CAP
1. VISUALLY INSPECT LINES AND CONNECTIONS
Look for loose connections,sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK
Look for deformation,cracks or fuel leakage.
To reduce HC emission, evaporated fuel from the fuel tank is routed through the charcoal canister to the throttle body
for combustion in the cylinders.
EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
HC from tank is absorbed
in the canister.
HC from tank is absorbed
in the canister.
HC from canister is led
into throttle body.
Check Valve in
Charcoal Canister
Check Valve
in Fuel Tank Cap
Positioned below
purge port
Positioned above
purge port
(Air is led into the tank.)
Throttle Valve
Opening
High pressure
in tank
Evaporated Fuel (HC)
High vacuum
in tank
CLOSED
CLOSED
CLOSED
CLOSED
OPEN
OPENOPEN
OPEN
–ENGINE EMISSION CONTROL SYSTEMS
EG1–86