Purge System Test - Subaru Forester Technicians Reference Booklet

2
000 Model Year Evaporative System Diagnosis

Purge System Test

Purge System Test Purge System Test
Purge System Test Purge System Test
(1) Disconnect CPC-1 from M-1.
(2) Start engine and check for strong
vacuum source at M-1.
(3) Engine off and ignition off
(4) Connect select monitor to data link
connector.
(5) Connect inspection mode connectors.
(6) Ignition on and engine off
(7) Turn on select monitor and adjust to
system operation check mode.
Activate a component and turn it off to establish
full control of all system operation check mode
items.
Step 8 and 9 will test the air tightness of the
vacuum line from the intake manifold to the
canister purge control solenoid. The air tightness
of the solenoid is checked at this time also.
(8) Connect PT-1 to CPC-1 and
"pressurize".
(9) Did pressure hold?
YES go to step (10).
NO go to step (10F).
Step 10 and 11 will test the electrical and
mechanical operation of the canister purge control
solenoid and the vacuum line from the out put
side of the solenoid to the canister for restrictions
or blockages.
(10) Disconnect CPC-16 from canister.
Picture 112.
Purge Hose
CPC-16
Fuel Tank
Drain Hose
D-1
F-1
112
(11) Activate CPC solenoid with select monitor.
(12) Did pressure go to zero immediately?
YES go to step (13).
NO go to step (13F).
Step 13 and 14 will test the vacuum hose from the
canister purge control solenoid to the canister for
air tightness.
(13) Insert ST plug into CPC-16 to block
hose.
(14) Pressurize.
(15) Did pressure hold?
YES go to step (16).
NO go to step (16F).
(16) Turn CPC solenoid off with select
monitor.
(17) Remove PT-1 from CPC-1.
(18) Connect CPC-1 to M-1.
(19) Remove ST plug from CPC-16.
(20) Connect CPC-16 to canister.
Notes:
9
STOP STOP STOP
STOP STOP
Effective 09-25-03