Suzuki Swift User Manual page 465

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-37
1) Disconnect purge hose (1) from EVAP canister.
2) Place finger against the end of disconnected hose and check
that vacuum is not felt there when engine is cool and running at
idle speed.
3) Connect purge hose to EVAP canister and warm up engine to
normal operating temperature.
4) Disconnect purge hose from EVAP canister.
5) Also check that vacuum is felt when engine is running at idle
speed.
NOTE:
The EVAP canister purge system does not perform purging
(vacuum is not detected at the purge hose) unless the en-
gine is sufficiently warmed up and the heated oxygen sen-
sor is activated fully. Also, when the purge hose is discon-
nected in Step 4), the air is drawn into the purge line. As a
result, ECM (PCM) detects a change in the purge gas con-
centration and sometimes stops purging but this indicates
nothing abnormal.
If check result is not satisfactory, check vacuum passage, hoses,
EVAP canister purge valve, wire harness and ECM (PCM).
Vacuum Passage Inspection
Start engine and run it at idle speed. Disconnect vacuum hose (1)
from EVAP canister purge valve (2). With finger placed against
hose disconnected, check that vacuum is applied.
If it is not applied, clean vacuum passage by blowing compressed
air.
Vacuum Hose Inspection
Check hoses for connection, leakage, clog and deterioration. Re-
place as necessary.
EVAP Canister Purge Valve Inspection
Check EVAP canister purge valve referring to step 1 of DTC P0443
Flow Table.
If found malfunction, replace.