Honda 2004 Odyssey Service Manual page 363

Fuel and Emissions Systems
System Descriptions (cont'd)
Evaporative Emission (EVAP) Control Diagram ('01-04 Models)
The EVAP controls minimize the amount of fuel vapor escaping to the atmosphere. Vapor from the fuel tank is
temporarily stored in the EVAP control canister until it can be purged from the canister into the engine and burned.
• The EVAP canister is purged by drawing fresh air through it and into a port on the intake manifold. The purging
vacuum is controlled by the EVAP canister purge valve, which operates whenever engine coolant temperature is
above 147°F (64°C).
• When vapor pressure in the fuel tank is higher than the set value of the EVAP two way valve, the valve opens and
regulates the flow of fuel vapor to the EVAP control canister.
• During refueling, the fuel tank vapor control valve opens with the pressure in the fuel tank, and feeds the fuel vapor
to the EVAP control canister.
'01 model:
FUEL TANK VAPOR
SIGNAL TUBE
FUEL TANK VAPOR FUEL TANK VAPOR
RECIRCULATION CONTROL VALVE
TUBE
FUEL
FILL
CAP
FUEL TANK VAPOR
RECIRCULATION
VALVE
11-54
FUEL TANK VAPOR
VENT TUBE
FTP SENSOR
EVAP
TWO WAY
VALVE
FUEL TANK
EVAP BYPASS
SOLENOID VALVE
EVAP CONTROL
CANISTER
EVAP CANISTER
VENT SHUT
VALVE
YEL/BLU
LT GRN
GRN/BLK
BLU
LT GRN/WHT
from
No.6 ECU
(PCM)
CRUISE
BLK/YEL CONTROL
(15A)
(in the driver's
under-dash
fuse/relay box)
VARIOUS
PCM
SENSORS
RED/YEL
BLK
EVAP CANISTER
PURGE VALVE
EVAP CONTROL
CANISTER
FILTER