Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

Page: 259 / 834

6-1-118 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
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”.
3) If you have SUZUKI scan tool, perform Step a). If not, per-
form Step b).
a) Using SUZUKI scan tool
i) Connect SUZUKI scan tool (1) to DLC (2) with ignition
switch OFF.
ii) 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”.
If check results are as described above, EVAP canister purge
valve and its circuit are in good condition, connect vacuum hoses
securely.
If not, proceed to Step 4).
b) Not using SUZUKI scan tool
i) Using service wire, connect C51-2-1 terminal of ECM
(PCM) coupler and body ground with ignition switch OFF.
ii) Turn ON ignition switch.
In this state, blow hose “A”.
Air should come out of hose “B”.
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).
4) With ignition switch OFF, disconnect coupler from EVAP can-
ister purge valve.
WARNING:
Do not suck the air through valve. Fuel vapor inside valve
is harmful.
WARNING:
Do not suck the air through valve. Fuel vapor inside valve
is harmful.