Suzuki GA413, Service Manual

Page: 930 / 1246

EVAPORATIVE EMISSION (EVAP) CONTROL
SYSTEM
EVAP CANISTER PURGE INSPECTION
NOTE:
Before inspection, check to make sure that gear shift lever is
in neutral position and that parking brake lever is pulled all the
way up.
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) Turn ignition switch OFF.
5) Restart engine and run it at 2000 r/min. for 2 min. or more.
6) Disconnect purge hose from EVAP canister.
7) Also check that vacuum is felt when engine is running at 3000
r/min.
NOTE:
ECM detects a change in the purge fuel vapor concentra-
tion and sometimes stops purging for several seconds but
this is nothing abnormal.
8) If vacuum is not felt in Step 7), run engine at idle for 8 min. or
more and then repeat check in Step 7).
If check result is not satisfactory in Steps 2) and 8), check vacuum
passage, hoses, EVAP canister purge valve, wire harness and ECM.
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.
6E-38 ENGINE AND EMISSION CONTROL SYSTEM
GA413
supple