MPG HONDA INTEGRA 1998 4.G Workshop Manual

Evaporative Emission (EVAP) Controls
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a
DescriDtion
The evaporative emission controls are designed to minimize the amount of luel vapor escaping to the atmosphere. Thesystem consists of the following components:
A. EvaporativeEmission lEVAPlControlCanister
An EVAP control canister is used for the temporary storage of fuel vapor until the fuel vapor can be purged from theEVAP control canister into the engine and burned.
B. Vapol Purge Control System
EVAP control canister purging is accomplished by drawing fresh air through the EVAP control canister and into a pon
on the intake manifold. The purging vacuum is controlled by the EVAP purge control solenoid valve.
C. Fuel Tank Vapor Control System
When fuel vapor pressure in the fuel tank is higher than the set value of the EVAP two way valve, the varve opens anoregulates the flow of fuel vapor to the EVAP control canister.
FrcmNo. 15FUELTANKPRESSURESENSOR
EVAPTHREE WAYVALVE
EVAP CONTROLCANISTENVENT SHUT VALVE
YEL/- BLK
EVAPBYPASSSOLENOIDVALVE
LT GRN
RED/EVAPTWO WAYVALVE
FUEL TANKEVAP VALVE
FUEL TANK
EVAP PURGE CONTROL SOLENOID VALVE DUTY CON-
TROLLED AFTER STARTING ENGINE
?!l ---- 311'AiS-*(7.s Al
FromPGM.FIMAIN RELAY
VARIOUSSENSORS
----<
YEL
EVAP PURGECONTROLSOLENOID VALVE
(cont'd)
-141

i'4l:
iL
BLU/BLK + ft'rtltt *r*,r.,
8LlffiED
T
BLK/]'I/HT - Shnsrsolenoid
BLKWHT - Slanorsolenoid
lPi[ 8i:t'Jl.,i (")
V
J--
; 8LK,,r,vHT STAFTEF| | cUT RELAY
tt+
tttil
i l_L i-l_
I l==_ |
ii?;19$'dlYi6 F-
Inlegraled control unil
ECMPGM'FImain relay
Key inlerlock solenoid (A/T)lnteiock conlrol un 1 (fuT)
COMSINAT]ON LIGHT SWITCH(To page 23 60)N0.43(Fom
Dara inh conneclof (olc)- C€ilinq liqhl
Cargo area lighl- Power antenna molof conneclor
(cont'd)
23-59
BLIffiED
UNDER.DASH FUSE/FEtAY 8OX
(Fuse/@lay box soc*el)
(7.54)FUSEpage 23'54)
f.7
I
N0.31 (7 5A)--l
N0.33 (7.54)
stuMHT-
I_
N0.20 (Nolused)
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