Suzuki 2000 Grand Vitara SQ416, Service Manual

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YH4
GRAND
VITARA
6E1-50 ENGINE AND EMISSION CONTROL SYSTEM (G16 / J20 ENGINES)
1. Tank pressure
control valve
2. Orange side
3. Black side
4. To canister
5. From fuel tank
1. PCV valve
1. PCV valve
1
Tank Pressure Control Valve Inspection
1) Remove tank pressure control valve installed around EVAP can-
ister.
2) Air should pass through valve smoothly from fuel tank side
(black side of tank pressure control valve) to orange side when
blown hard.
3) From orange side, even when blown softly, air should come out
of black side.
4) If air doesn’t pass through valve in step 2) or hard blow is re-
quired in step 3), replace tank pressure control valve.
WARNING:
DO NOT SUCK air through tank pressure control valve.
Fuel vapor inside the valve is harmful.
5) Install tank pressure control valve.
NOTE:
When connecting tank pressure control valve between
hoses, refer to figure at the left for installing direction.
PCV SYSTEM
NOTE:
Be sure to check that there is no obstruction in PCV valve or
its hoses before checking engine idle speed / IAC duty for ob-
structed PCV valve or hose hampers its accurate checking.
PCV HOSE
Check hoses for connection, leakage, clog, and deterioration.
Replace as necessary.
PCV VALVE
1) Disconnect PCV valve 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 vacuum.
If there is no vacuum, check for clogged valve. Replace as nec-
essary.
4) After checking vacuum, stop engine and remove PCV valve.
Shake valve and listen for the rattle of check needle inside the
valve. If valve does not rattle, replace valve.
5) After checking, connect PCV valve, PCV hose and clamp se-
curely.