Suzuki 2000 Grand Vitara SQ625 Service Manual page 213

6-1-102 ENGINE (H25 ENGINE)
2
EVAP Canister Purge Valve and Its Circuit Check.
1) Disconnect vacuum hoses from vacuum pipes.
2) With ignition switch ON, blow into hose "A". Air should not come
out of hose "B".
Using SUZUKI scan tool
3) Connect SUZUKI scan tool (1) to DLC (2) with ignition switch
OFF.
3-1) Turn ON EVAP canister purge valve by using SUZUKI scan
tool with ignition switch ON.
In this state, blow hose "A".
Air should come out of hose "B".
WARNING:
Do not suck the air through valve. Fuel vapor inside
valve is harmful.
If check results are as described above, EVAP canister purge valve
and its circuit are in good condition, connect vacuum hoses secure-
ly.
If not, proceed to step 4).
Not using SUZUKI scan tool
3) Using service wire, connect C51-2-1 terminal of ECM (PCM)
coupler and body ground with ignition switch OFF.
3-1) Turn ON ignition switch.
In this state, blow hose "A".
Air should come out of hose "B".
WARNING:
Do not suck the air through valve. Fuel vapor inside
valve is harmful.
If check results are as described above and C51-2-1 terminal to
ECM connection is OK, EVAP canister purge valve and its circuit
are in good condition, connect vacuum hoses securely.
If not, proceed to step 4).