Suzuki 2000 Grand Vitara SQ625 Service Manual page 92

6-88 ENGINE DIAGNOSIS (G16 / J20 ENGINES)
EVAP Canister Purge System Check
1) Warm up engine to normal operating temperature.
2) Hoist vehicle so that all wheels rotate freely.
3) Set M/T in "Neutral" or A/T in "P" position and parking brake.
4) Disconnect purge hose from EVAP canister.
5) Place finger against the end of disconnected hose and check
that vacuum is not felt there when engine is running at idle
speed.
6) Release parking brake lever, set transfer in "2H" and M/T in "1st"
or A/T in "L".
WARNING:
Make sure that transfer is set to "2H" range position for
this check. If it is set to "4H" or "4L" position, front and
rear wheels turn at high speed and a very dangerous situ-
ation may occur.
7) Also check that vacuum is felt when engine speed is increased
to higher than about 1,500 r/min. and keep it for 3 min. or more.
If check result is not described in steps 5) and 7), check EVAP
canister purge valve, wire harness and vacuum passage.
1. Purge hose
EVAP Canister Purge Valve Inspection
1) With ignition switch OFF, disconnect coupler from canister
purge valve.
2) Check resistance between two terminals of EVAP canister
purge valve.
Resistance of EVAP canister purge valve:
28 – 35 W at 20_C (68_F)
If resistance is as specified, proceed to next operation check. If
not, replace.
3) Disconnect vacuum hoses from intake manifold and its EVAP
canister.
4) With coupler disconnected, blow into hose "A". Air should not
come out of hose "B".
1. Hose "A"
2. Hose "B"
3. EVAP canister
purge valve