Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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6E2-48 ENGINE AND EMISSION CONTROL SYSTEM (H25 ENGINE)
Evaporative emission control system
EVAP CANISTER PURGE INSPECTION
1) Warm up engine to normal operating temperature and keep
idling 5 min. or more.
2) Disconnect purge hose (1) from EVAP canister when engine
is running at idle speed.
3) Place finger against the end of disconnected hose and check
that vacuum is not felt but vibration is felt there when engine
is running at idle speed.
4) Also check that vacuum is felt when engine speed is
increased to higher than about 2,000 r/min.
If check result is not satisfactory, check vacuum passage,
hoses, EVAP canister purge valve, wire harness and ECM
(PCM).
EVAP CANISTER PURGE VALVE INSPECTION
Refer to “EVAP Canister Purge Valve Inspection” in Section 6E1.
EVAP CANISTER INSPECTION
Refer to “EVAP Canister Inspection” in Section 6E1.
TANK PRESSURE CONTROL VALVE INSPECTION
Refer to “Tank Pressure Control Valve Inspection” in Section 6E1.
PCV system
PCV Hose
Check hoses for connection, leakage, clog, and deterioration.
Replace as necessary.
PCV Valve
1) Disconnect PCV valve (1) from cylinder head cover and plug
head cover hole.
2) Run engine at idle.
3) Place your finger over end of PCV valve to check for vac-
uum.
If there is no vacuum, check for clogged valve. Replace as
necessary.
NOTE:
Be sure to check that there is no obstruction in PCV
valve or its hoses (1) before checking engine idle speed/
IAC duty for obstructed PCV valve or hose hampers its
accurate checking.