Suzuki Wagon R Manual page 1315

ENGINE AND EMISSION CONTROL SYSTEM 6E1-33
EVAP CANISTER PURGE VALVE INSPECTION
WARNING:
Do not suck the air through valve. Fuel vapor inside valve
is harmful.
1) With the ignition switch OFF position, disconnect coupler from
EVAP canister purge valve.
2) Check resistance between two terminals of EVAP canister
purge valve.
Resistance of EVAP canister purge valve:
30 – 34 Ω 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 pipe.
4) With coupler disconnected, blow into pipe "A". Air should not
come out of pipe "B".
5) Connect 12 V-battery to EVAP canister purge valve terminals.
In this state, blow pipe "A".
Air should come out of pipe "B".
If check result is not as described, replace canister purge valve.
6) Connect vacuum hoses.
7) Connect EVAP canister purge valve coupler securely.