Suzuki GRAND VITARA XL-7 Owner's Manual page 263

6-1-102 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)
5) Connect 12 V-battery to EVAP canister purge valve (3) termi-
nals. In this state, blow hose "A" (1).
Air should come out of hose "B" (2).
If check result is not as described, replace EVAP canister
purge valve.
WARNING:
Do not suck the air through valve. Fuel vapor inside valve
is harmful.
6) Connect vacuum hoses.
7) Connect EVAP canister purge valve coupler securely.