Subaru XT 1988 Service Manual page 137

EMISSION CONTROL SYSTEM AND VACUUM FITTING
Purge control
solenoid valve
Throttle body
Vacuum line
Purge line
Tank vapor line
Canister
Fig. 9 2700 cc
CANISTER
The purge control valve on the canister is controlled by the
intake manifold vacuum_ When the purge control valve is
opened, the absorbed vapor is introduced from the canister
into the throttle body.
When the engine is not running, the purge control valve is
closed by the return spring.
9
Two-way valve
+--
Fuel filler cap
(Vacuum relief)
Vapor volume
-
--~----
Fuel tank~
Purge vent
Vacuum orifice:
0.4 mm (0.016 in)
Purge control valve
Fig. 10
Activated
carbon
Fi Iter
Fuel tank volume
From fuel tank
100 mm (3.94 in)
2-1
L2-1261
L2-1262